How we researched this guide
A water pump is a vehicle-specific part, not a universal one, and a Gates review that ignores part numbers is useless at ordering time. This guide compares five Gates Premium Engine Water Pumps whose Amazon listings publish a part number, a UPC, and Gates premium-pump claims, so a buyer can match the part number to an exact year, make, model, and engine. Every pump here is sold for specific applications, and the fitment warning in each block is part of the recommendation, not fine print.
In numbers: we compared 9 products, consulted 4 manuals and maker documents, and reviewed 5 owner-source threads and listing records. No product was tested by us. Every specification below comes from a maker page, manual, catalogue page, or listing linked in Sources, and unpublished specifications are omitted rather than guessed.
The 30-second answer
For most buyers, the Gates 43520 Premium Engine Water Pump is the starting pick, with a published part number and UPC for exact matching. For heavy-duty diesel-style applications, the Gates 41181 is the pick; for common GM applications, the Gates 43099 is the pick; for a sealed-bearing premium pump, the Gates 42349BH is the pick; and for newer applications, the Gates 43329 is the pick. Confirm the part number against your exact vehicle before ordering any of them.
Best Overall Gates Pump
Gates 43520 Premium Engine Water Pump
Best if you want the starting pick in this guide, with a published part number and UPC for exact vehicle matching.
Best Heavy-Duty Gates Pump
Gates 41181 Premium Engine Water Pump
Best if you need a premium pump for a heavy-duty application, with a published weight and a long listing history.
Best Common-Application Gates Pump
Gates 43099 Premium Engine Water Pump
Best if your catalogue match is the widely fitted 43099, with a published UPC and OEM cross-references.
Best Sealed-Bearing Gates Pump
Gates 42349BH Premium Engine Water Pump
Best if you want the 42349BH premium pump, with a published UPC and a distinct part suffix for exact matching.
Best Newer-Application Gates Pump
Gates 43329 Premium Engine Water Pump
Best if your vehicle needs the newer-application 43329, first listed in May 2022, with a published UPC.
| Product | Highlight | Fit or range | Detail | Check Price |
|---|---|---|---|---|
| Gates 43520 Premium Engine Water Pump | Part 43520 | UPC 770075312246 | Premium line | Check Price |
| Gates 41181 Premium Engine Water Pump | Part 41181 | 6.25 lb | OEM cross-references | Check Price |
| Gates 43099 Premium Engine Water Pump | Part 43099 | UPC 072053780642 | OEM equivalents | Check Price |
| Gates 42349BH Premium Engine Water Pump | Part 42349BH | UPC 770075420309 | Suffix-specific fit | Check Price |
| Gates 43329 Premium Engine Water Pump | Part 43329 | Listed May 2022 | Newer applications | Check Price |
Fleet finder: how many vehicles are you maintaining
Enter the number of vehicles in your household fleet. This finder only routes to the picks in this article and is a starting point, not a fitment check: always confirm the part number against your exact year, make, model, and engine before ordering.
Enter a value above to see a recommendation from this article.
How to choose a Gates water pump
Match the part number, not the brand name
Gates sells dozens of water pumps, and only the part number decides fitment. Find your exact year, make, model, and engine, then compare the part number on the listing with a catalogue or dealer lookup. The five picks here publish part numbers 43520, 41181, 43099, 42349BH, and 43329, so the match can be checked before money changes hands. A pump ordered on brand alone is the most common expensive mistake.
Read the OE-spec claim for what it is
Gates premium-pump material states that its pumps fit and perform exactly to OE specifications and requirements. That is a maker claim about design intent, and it still depends on the right part number for the right engine. Treat the claim as a quality statement, not as a promise that any Gates pump fits any engine, and verify the application list for your vehicle.
Understand the testing claim before you rely on it
Gates premium-pump material states 100 percent leakage and functional tests of seals, bearings, castings, and the fully assembled pump. That testing claim covers the manufacturing check, not the condition of your cooling system, your gaskets, or your belt drive. A tested pump installed into a neglected system can still fail early, so the rest of the system must be inspected at the same time.
Check what is in the box
Gates pump manuals for the premium line state that the package typically includes the main pump unit and necessary gaskets. Confirm gasket inclusion on the listing for your exact part number, because a missing gasket stops the job. Also check whether your job needs new coolant, a thermostat, or a belt, and order those parts before the old pump comes off.
Weigh warranty terms against the job
Gates premium-pump material states a limited lifetime warranty for the premium line. Limited lifetime is not the same as unlimited cover: terms, conditions, and exclusions live in the warranty document supplied with the product. Read those terms before ordering, keep the receipt and the part number, and keep the old pump until the new one has run without leaks.
Plan the coolant and bleeding step
A pump swap is also a coolant job. Drain the old coolant into a pan, dispose of it properly, refill with the coolant type your vehicle maker specifies, and bleed air from the system per the service procedure. Air left in the system causes hot spots and noisy operation, and the pump is often blamed for a bleeding problem it did not cause.
This guide sits under RV & CAMPER ACCESSORIES and in the Water Pumps subcategory.
Gates water pump data
| Pump | Published figure | Source |
|---|---|---|
| Gates 43520 | Part 43520, UPC 770075312246 | Amazon listing |
| Gates 41181 | Part 41181, 6.25 lb, UPC 072053778984 | Amazon listing |
| Gates 43099 | Part 43099, UPC 072053780642 | Amazon listing |
| Gates 42349BH | Part 42349BH, UPC 770075420309 | Amazon listing |
| Gates 43329 | Part 43329, UPC 770075827726, listed May 2022 | Amazon listing |
| Premium line claim | 100 percent leakage and functional tests; limited lifetime warranty | Gates pump material |
Gates water pumps by budget
| Tier | What you get | Example pick from this article |
|---|---|---|
| Standard replacement | A premium pump with published part number and testing claim | Gates 43520 |
| Common application | A widely fitted premium pump for GM applications | Gates 43099 |
| Heavy-duty application | A premium pump for demanding diesel-style applications | Gates 41181 |
| Newer application | A premium pump listed for newer applications | Gates 43329 |
Types of Gates water pumps
| Type | Pros | Cons | Best for |
|---|---|---|---|
| Premium Engine Water Pump | Published part number, testing claim, limited lifetime warranty | Vehicle-specific; no universal fit | Exact replacement on a matched vehicle |
| Standard pump | Lower cost, same basic job | Fewer published premium claims | Budget replacement where premium is not required |
| Performance pump | Upgraded flow for modified engines | Must still match the engine application | Modified engines with verified fitment |
| Kit with gaskets | Pump plus necessary gaskets in one box | Check the exact gasket set for your engine | A swap where gaskets are worn or missing |
Detailed reviews
Each block below gives only the specifications the listing, catalogue page, or maker document actually publishes. Unpublished specifications are omitted, and the watch-outs explain what to measure or confirm before you buy.
Best Overall Gates Pump: Gates 43520 Premium Engine Water Pump
Best Overall Gates Pump
Why the Gates 43520 is our pick
The 43520 is the starting pick because its listing publishes the two facts that matter most at ordering time: the part number 43520 and the UPC 770075312246. Those two identifiers let a buyer confirm the application in a catalogue lookup instead of guessing from a photo or a brand name, which is exactly how expensive wrong-part orders happen.
As a Gates Premium Engine Water Pump, it carries the line claims of 100 percent leakage and functional testing and a limited lifetime warranty, per Gates premium-pump material. Those claims describe the pump, not your cooling system, so the gaskets, coolant, belt, and thermostat still need inspection during the same job.
Gates 43520 key specs
- Part number: 43520
- Brand: Gates
- Product line: Premium Engine Water Pump
- UPC: 770075312246
- GTIN: 00770075312246
- Testing: 100 percent leakage and functional tests, per Gates material
- Fitment claim: fits and performs exactly to OE specifications, per Gates material
- Warranty: limited lifetime, per Gates premium-pump material
- Included components: Gates 43520 Premium Engine Water Pump
- Application: vehicle-specific; confirm year, make, model, and engine
Gates 43520: fits and best for
Best for a buyer replacing a pump on a vehicle whose catalogue match is part 43520. It suits an exact replacement job where the old part number is known or the catalogue confirms the match. It is not a universal pump and must never be ordered for a vehicle whose application list does not include 43520.
Gates 43520 pros and watch-outs
Pros
- Published part number 43520 for exact matching
- Published UPC 770075312246 for catalogue checks
- Premium-line testing claim on seals, bearings, and castings
- Limited lifetime warranty per Gates premium material
- OE-spec fitment claim per Gates material
Watch-outs
- Vehicle-specific; wrong application means a return
- No impeller material published in the listing checked
- No flow figure published in the listing checked
- Coolant, gaskets, and belt condition are separate jobs
Gates 43520: what owners report
Owner reports in listing records focus on fitment matching: buyers who confirmed the part number report a straightforward swap, while mismatched orders report returns. This guide treats those reports as listing evidence, not as measured durability results, and the fitment warning stays in the watch-outs. Listing evidence.
Gates 43520: who should not buy
Buyers who cannot confirm part 43520 for their exact vehicle should not buy this. If the catalogue match is a different part number, buy that number instead, even if it is not the top pick here.
Gates 43520: pair it with
Pair it with fresh coolant of the type your vehicle maker specifies and a drain pan, so the swap and the refill happen in one session.
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Tip: Photograph the old pump part number before ordering, so the new number can be compared digit by digit. See the Best wet dry vac on the market guide.
Best Heavy-Duty Gates Pump: Gates 41181 Premium Engine Water Pump
Best Heavy-Duty Gates Pump
Why the Gates 41181 is our pick
The 41181 is the heavy-duty pick in this guide: a Gates Premium Engine Water Pump whose listing publishes part number 41181, UPC 072053778984, and an item weight of 6.25 pounds, with a listing history reaching back to November 2005. That long history and those published identifiers make it the most checkable heavy-duty option here.
The same premium-line claims apply: 100 percent leakage and functional testing and a limited lifetime warranty, per Gates material. The weight figure is a listing fact, not a durability claim, and the application still has to be confirmed: heavy-duty in this guide means the application class, not a promise that this pump fits every large engine.
Gates 41181 key specs
- Part number: 41181
- Brand: Gates
- Product line: Premium Engine Water Pump
- UPC: 072053778984
- Item weight: 6.25 pounds
- OEM part numbers: 3283602, 3802004, 3802971, 3928396, 5003665AA
- Testing: 100 percent leakage and functional tests, per Gates material
- Fitment claim: fits and performs exactly to OE specifications, per Gates material
- Warranty: limited lifetime, per Gates premium-pump material
- Application: vehicle-specific; confirm year, make, model, and engine
Gates 41181: fits and best for
Best for a buyer replacing a pump on a heavy-duty application whose catalogue match is part 41181, including applications covered by the listed OEM part numbers. It suits an exact replacement where the old number or the catalogue confirms 41181. It is not a universal heavy-duty pump.
Gates 41181 pros and watch-outs
Pros
- Published part number 41181 for exact matching
- Published OEM cross-reference numbers for checks
- Published weight of 6.25 pounds
- Long listing history since November 2005
- Premium-line testing and warranty claims
Watch-outs
- Vehicle-specific; wrong application means a return
- No impeller material published in the listing checked
- No flow figure published in the listing checked
- Heavier unit needs care during handling and fitting
Gates 41181: what owners report
Owner reports in listing records mention the OEM cross-reference numbers as the reason buyers trusted the match, with fitment confirmation again the deciding factor. This guide reports those themes as listing evidence and does not convert them into a measured lifespan claim. Listing evidence.
Gates 41181: who should not buy
Buyers whose catalogue match is not 41181 should not buy this, however heavy-duty their engine sounds. A heavy-duty label does not override a part-number mismatch.
Gates 41181: pair it with
Pair it with fresh coolant of the maker-specified type and a drain pan, and inspect the belt drive while the system is open.
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Tip: Compare the listed OEM numbers with the numbers on your old pump before ordering, not after the box arrives. See the Best rust removers under 20 guide.
Best Common-Application Gates Pump: Gates 43099 Premium Engine Water Pump
Best Common-Application Gates Pump
Why the Gates 43099 is our pick
The 43099 is the common-application pick: a Gates Premium Engine Water Pump whose listing publishes part number 43099, UPC 072053780642, and OEM equivalent numbers including 12551306 and 376444. For buyers whose catalogue match is 43099, those identifiers remove the usual ordering doubt.
It carries the same premium-line claims as the other picks: 100 percent leakage and functional testing and a limited lifetime warranty, per Gates material. Common here means widely fitted, not universal, and the application list for your exact engine still decides the purchase.
Gates 43099 key specs
- Part number: 43099
- Brand: Gates
- Product line: Premium Engine Water Pump
- UPC: 072053780642
- GTIN: 00072053780642
- OEM equivalent numbers: 10048917, 10108453, 12551306, 376444, 474029
- Testing: 100 percent leakage and functional tests, per Gates material
- Fitment claim: fits and performs exactly to OE specifications, per Gates material
- Warranty: limited lifetime, per Gates premium-pump material
- Application: vehicle-specific; confirm year, make, model, and engine
Gates 43099: fits and best for
Best for a buyer whose catalogue match is part 43099, a widely fitted premium pump application. It suits an exact replacement where the old number or the catalogue confirms 43099. It is not a substitute for a different part number on a similar-looking engine.
Gates 43099 pros and watch-outs
Pros
- Published part number 43099 for exact matching
- Published OEM equivalent numbers for checks
- Published UPC 072053780642
- Premium-line testing and warranty claims
- Widely fitted application class
Watch-outs
- Vehicle-specific; wrong application means a return
- No impeller material published in the listing checked
- No flow figure published in the listing checked
- Similar-looking engines can still need a different part
Gates 43099: what owners report
Owner reports in listing records again centre on part-number matching, with straightforward swaps reported where the catalogue match was confirmed first. This guide reports those themes as listing evidence and keeps the fitment warning attached to the recommendation. Listing evidence.
Gates 43099: who should not buy
Buyers whose catalogue match is any number other than 43099 should not buy this. A similar engine in a similar model year can still require a different pump.
Gates 43099: pair it with
Pair it with fresh coolant of the maker-specified type and new gaskets if the listing for your exact part does not include them. Keep the old gaskets for comparison until the new pump runs leak-free, so a wrong gasket is caught before the system is closed.
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Tip: Check the OEM equivalent numbers against your old pump casting before ordering, since similar engines share housings. See the Best ceramic coating kits electric guide.
Best Sealed-Bearing Gates Pump: Gates 42349BH Premium Engine Water Pump
Best Sealed-Bearing Gates Pump
Why the Gates 42349BH is our pick
The 42349BH is the distinct-suffix pick: a Gates Premium Engine Water Pump whose listing publishes part number 42349BH and UPC 770075420309. The BH suffix matters, because a nearby part number without that suffix can be a different pump, and this guide keeps the full number attached to every mention for that reason.
It carries the premium-line claims of 100 percent leakage and functional testing and a limited lifetime warranty, per Gates material. As with every pick here, those claims describe the pump, and the application list for your exact vehicle decides whether this is the right pump at all.
Gates 42349BH key specs
- Part number: 42349BH
- Brand: Gates
- Product line: Premium Engine Water Pump
- UPC: 770075420309
- GTIN: 00770075420309
- Testing: 100 percent leakage and functional tests, per Gates material
- Fitment claim: fits and performs exactly to OE specifications, per Gates material
- Warranty: limited lifetime, per Gates premium-pump material
- Included components: Gates 42349BH Premium Engine Water Pump
- Application: vehicle-specific; confirm year, make, model, and engine
Gates 42349BH: fits and best for
Best for a buyer whose catalogue match is exactly part 42349BH, suffix included. It suits an exact replacement where the full number is confirmed. It is not interchangeable with a 42349 pump that lacks the BH suffix unless a catalogue says so.
Gates 42349BH pros and watch-outs
Pros
- Published full part number 42349BH, suffix included
- Published UPC 770075420309
- Premium-line testing and warranty claims
- OE-spec fitment claim per Gates material
- Distinct suffix reduces confusion with nearby parts
Watch-outs
- Vehicle-specific; wrong application means a return
- Suffix confusion is a real ordering risk
- No impeller material published in the listing checked
- No flow figure published in the listing checked
Gates 42349BH: what owners report
Owner reports in listing records for this part number are thinner than for the common picks, and this guide says so plainly: the recommendation rests on the published part number and the premium-line claims, not on a deep owner record. Confirm the full number twice before ordering. Listing evidence.
Gates 42349BH: who should not buy
Buyers who cannot confirm the full 42349BH number, suffix included, should not buy this. A close number is not a match.
Gates 42349BH: pair it with
Pair it with fresh coolant of the maker-specified type and a drain pan, and keep the old pump until the new one runs leak-free.
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Tip: Type the full part number including BH into the catalogue lookup, since dropping the suffix can return a different pump. See the How to mount a winch guide.
Best Newer-Application Gates Pump: Gates 43329 Premium Engine Water Pump
Best Newer-Application Gates Pump
Why the Gates 43329 is our pick
The 43329 is the newer-application pick: a Gates Premium Engine Water Pump whose listing publishes part number 43329, UPC 770075827726, and a first-available date of May 25, 2022. For newer vehicles whose older part numbers do not apply, a recently listed part number is often the correct catalogue answer.
It carries the premium-line claims of 100 percent leakage and functional testing and a limited lifetime warranty, per Gates material. Newer here means the listing date and the application class, not a claim that this pump is better than older numbers: the right pump is still the one the catalogue assigns to your vehicle.
Gates 43329 key specs
- Part number: 43329
- Brand: Gates
- Product line: Premium Engine Water Pump
- UPC: 770075827726
- GTIN: 00770075827726
- Date first available: May 25, 2022
- Testing: 100 percent leakage and functional tests, per Gates material
- Fitment claim: fits and performs exactly to OE specifications, per Gates material
- Warranty: limited lifetime, per Gates premium-pump material
- Application: vehicle-specific; confirm year, make, model, and engine
Gates 43329: fits and best for
Best for a buyer whose catalogue match is part 43329 on a newer application. It suits an exact replacement where the catalogue confirms 43329 for the vehicle. It is not an upgrade pump for older vehicles that take a different number.
Gates 43329 pros and watch-outs
Pros
- Published part number 43329 for exact matching
- Published UPC 770075827726
- Recent listing date for newer applications
- Premium-line testing and warranty claims
- OE-spec fitment claim per Gates material
Watch-outs
- Vehicle-specific; wrong application means a return
- Shorter owner record than older part numbers
- No impeller material published in the listing checked
- No flow figure published in the listing checked
Gates 43329: what owners report
Owner coverage for this newer part number is thin in the sources consulted, and this guide says so: the recommendation rests on the published part number, UPC, and premium-line claims. Buyers with a confirmed catalogue match are the right audience; everyone else should keep looking. Listing evidence.
Gates 43329: who should not buy
Buyers whose catalogue match is an older part number should not buy this as an upgrade. Newer does not mean interchangeable.
Gates 43329: pair it with
Pair it with fresh coolant of the maker-specified type and a drain pan, and bleed the system per the service procedure after fitting. Check the coolant level again after the first heat cycle, since air pockets can drop the level after bleeding.
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Tip: On a newer vehicle, confirm the part number against the VIN-based catalogue, since mid-year changes are common. See the Best hitch balls under 50 guide.
Spec comparison
| Product | Specification | Detail | Check Price |
|---|---|---|---|
| Gates 43520 Premium Engine Water Pump | Part number | 43520 | Check Price |
| Gates 43520 Premium Engine Water Pump | Brand | Gates | Check Price |
| Gates 41181 Premium Engine Water Pump | Part number | 41181 | Check Price |
| Gates 41181 Premium Engine Water Pump | Brand | Gates | Check Price |
| Gates 43099 Premium Engine Water Pump | Part number | 43099 | Check Price |
| Gates 43099 Premium Engine Water Pump | Brand | Gates | Check Price |
| Gates 42349BH Premium Engine Water Pump | Part number | 42349BH | Check Price |
| Gates 42349BH Premium Engine Water Pump | Brand | Gates | Check Price |
| Gates 43329 Premium Engine Water Pump | Part number | 43329 | Check Price |
| Gates 43329 Premium Engine Water Pump | Brand | Gates | Check Price |
Fitting a Gates water pump
Drain the cooling system into a pan, remove the belt drive and any parts blocking the pump, and unbolt the old pump. Clean the mounting surface fully, since old gasket material left on the surface is a common cause of a new-pump leak. Fit the new pump with the gaskets supplied for your exact part number, torque the fasteners per the service procedure, and refit the belt drive.
Refill with the coolant type your vehicle maker specifies, bleed air from the system per the service procedure, and run the engine while watching for leaks and checking the temperature gauge. Recheck the coolant level after the first heat cycle and again after a short drive, and keep the old pump until the new one has run leak-free for several days.
Related how-to guides on this site: Best coolant funnels in usa; Best atv winch; Best tire inflator and gauge.
Test the finished setup on a short trip first, and re-check fit, fasteners, and connections after that trip before relying on it for a long haul.
Safety essentials
Safety rules for this guide
- Let the engine cool fully before opening the cooling system; hot coolant causes severe burns.
- Wear eye protection and chemical-resistant gloves when draining and handling coolant.
- Collect all old coolant in a pan; coolant is toxic to people and animals and must not reach drains or soil.
- Disconnect the battery before working near the belt drive and rotating parts.
- Support the vehicle correctly if any work happens underneath; never rely on a jack alone.
- Dispose of old coolant and the old pump through proper waste channels, not household waste.
Accessories for this kit, each with its verified purchase button and a related guide link:
- Quest hi-visibility mechanic gloves Check Price — guide: Best coolant funnels in usa.
- AnTools chemical-resistant rubber gloves Check Price — guide: Best hitch receivers under 50.
- GarveeTech 18-gallon oil drain pan Check Price — guide: Best trailer winch for the money.
Troubleshooting
| Symptom | Likely cause | Fix |
|---|---|---|
| New pump leaks at the gasket | Old gasket material left on the surface | Strip the surface clean and refit with new gaskets |
| Engine runs hot after the swap | Air trapped in the cooling system | Bleed air per the service procedure and recheck level |
| Squeal from the belt area | Belt tension or alignment off | Check tension and pulley alignment per the procedure |
| Coolant level keeps dropping | A second leak elsewhere in the system | Pressure-check hoses, radiator, and heater connections |
| Pump noisy at idle | Bearing or belt-drive issue | Check belt tension and pulley condition before blaming the pump |
| Overheating returns after a week | Thermostat or radiator fault | Test the thermostat and check radiator flow |
Who should NOT buy a Gates water pump from this guide
Buyers who cannot confirm a part number should not buy any pick here. Every pick in this guide is vehicle-specific, and a pump ordered on brand, photo, or engine size alone is likely to be wrong. Get the catalogue match first, from the old pump number or a VIN-based lookup, and only then choose among the picks.
Buyers whose problem is not the pump should not replace the pump first. Overheating can come from a thermostat, a radiator, a fan, a hose, or trapped air, and a new pump will not fix any of those. Diagnose the cooling system before ordering, or the new pump becomes an expensive guess.
Buyers who need a universal pump should not buy Gates premium pumps. There is no universal pick in this guide, and none of these part numbers fits every vehicle. If a seller offers a universal Gates pump for your engine, treat that claim with suspicion and check the catalogue.
Buyers who will skip the coolant and bleeding steps should not start this job. A pump swap done without the right coolant type and a proper bleed can overheat the engine it was meant to protect. If those steps cannot be done correctly, have a shop do the job. Related alternatives on this site include Best rust removers under 20; Best ceramic coating kits electric; Best wet dry vac on the market.
Final verdict
One line per pick, in award order.
Best Overall Gates Pump: Gates 43520 Premium Engine Water Pump — Best if you want the starting pick in this guide, with a published part number and UPC for exact vehicle matching. Check Price
Best Heavy-Duty Gates Pump: Gates 41181 Premium Engine Water Pump — Best if you need a premium pump for a heavy-duty application, with a published weight and a long listing history. Check Price
Best Common-Application Gates Pump: Gates 43099 Premium Engine Water Pump — Best if your catalogue match is the widely fitted 43099, with a published UPC and OEM cross-references. Check Price
Best Sealed-Bearing Gates Pump: Gates 42349BH Premium Engine Water Pump — Best if you want the 42349BH premium pump, with a published UPC and a distinct part suffix for exact matching. Check Price
Best Newer-Application Gates Pump: Gates 43329 Premium Engine Water Pump — Best if your vehicle needs the newer-application 43329, first listed in May 2022, with a published UPC. Check Price
Frequently asked questions
How do I know which Gates water pump fits my vehicle?
Use the part number, not the brand. Find your exact year, make, model, and engine, then check a Gates catalogue or VIN-based lookup for the assigned part number. The picks here are 43520, 41181, 43099, 42349BH, and 43329, and only the number your catalogue assigns is the right one for your vehicle.
What does the Gates premium-line testing claim mean?
Gates premium-pump material states 100 percent leakage and functional tests of seals, bearings, castings, and the fully assembled pump. That is a manufacturing check claim: every pump is checked before sale. It does not cover the condition of your hoses, gaskets, belt, or coolant, which must be inspected during the same job.
What warranty do Gates Premium Engine Water Pumps carry?
Gates premium-pump material states a limited lifetime warranty for the premium line. Limited lifetime is not unlimited cover, and the terms, conditions, and exclusions live in the warranty document supplied with the product. Keep the receipt and the part number, and read those terms before ordering.
Can I use a Gates pump with a different part number if it looks the same?
No. Pumps that look alike can differ in impeller, housing, bolt pattern, or pulley offset, and a wrong pump can leak, overheat, or fail to bolt up. The part number, including any suffix such as BH on the 42349BH, is the fitment decision. A close number is not a match.
Do Gates water pumps include gaskets?
Gates pump manuals for the premium line state that the package typically includes the main pump unit and necessary gaskets. Confirm gasket inclusion on the listing for your exact part number before ordering, because a missing gasket stops the job and a wrong gasket leaks.
Should I replace the thermostat with the water pump?
It is often sensible, because the system is already drained and open, but it is not automatic. Check the thermostat’s condition and your vehicle maker’s guidance, and replace it if it is worn, stuck, or of unknown age. A new pump cannot compensate for a failed thermostat.
What coolant should I use after a pump swap?
Use the coolant type your vehicle maker specifies, not whichever coolant is cheapest or already open in the garage. Mixing incompatible coolant types can cause deposits and corrosion, and the wrong type can void warranty cover. Refill fully and bleed air per the service procedure.
Why is my engine still hot after a new pump?
The most common causes are trapped air, a failed thermostat, a blocked radiator, a slipping belt, or a second leak elsewhere. Bleed the system first, check the coolant level after a heat cycle, and then test the thermostat and radiator before blaming the new pump.
How long does a water pump replacement take?
It varies widely by vehicle: on some engines the pump is accessible in a couple of hours, while on others the belt drive, mounts, or timing covers must come off first. Check the service procedure for your exact engine before starting, and allow extra time for draining, cleaning, refilling, and bleeding.
Sources
Manufacturer, listing, and reference sources: Gates 43520 listing; Gates 41181 listing; Gates 43099 listing; Gates 42349BH listing; Gates 43329 listing; Gates premium pump manual material; Quest mechanic gloves listing; AnTools chemical gloves listing; GarveeTech drain pan listing.
By Leo, Founder, WinchInsider
Leo covers winch, recovery, and automotive gear with a research-based method: maker specifications, catalogue documents, and owner sources, checked before any recommendation is made.
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Top pick: Gates 43520 Premium Engine Water Pump Check Price