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Caterpillar 2W-8004 is the gear driven engine coolant pump: cast body, drive gear, bearing, seal and impeller. It is used on Caterpillar 3304 and 3306 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Water Pump |
| Replaces | Caterpillar 2W-8004 |
| Drive | Gear |
| Fits | Caterpillar 3304, 3306, 3304B and 3306B engines, D6D dozer, SR4 generator and 140, 141 and 143 motor graders |
| Condition | New, aftermarket |
| Stat. HS-Code | 841330 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 2W-8004(SPM-HEP-4452) | Caterpillar 3304, 3306, 3304B and 3306B engines, D6D dozer, SR4 generator and 140, 141 and 143 motor graders |
What it does
It circulates coolant through the block, head and radiator. A worn seal or bearing lets coolant out and the engine overheat.
Where it is used
Made for the Caterpillar 3304, 3306, 3304B, 3306B engines and 5 more. The full list is in the tables above.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (4 aftermarket sellers) | USD 262.55 to 386.05 | 29 Oct 2026 |
| FridayParts | USD 292.94 | 29 Oct 2026 |
| Spare Part Mart | USD 221.07 | Today |
Our price of USD 221.07 is 16% to 43% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Caterpillar 3304, and 8 more listed under compatible equipment. Check the old water pump is marked 2W-8004 or one of the cross references, because makers change parts between serial ranges.
On the Caterpillar 3304, often 5,000 to 10,000 hours with clean fluid, much less with dirt or air in the system. It is usually changed on condition, not by hours.
Leaks from the seal or weep hole, noise or whining, overheating, or falling pressure or flow under load.
If the coolant is old or dirty, yes. Worn coolant is the usual cause of seal failure, and a new pump in old coolant fails the same way.
Clean them right back to metal and fit the new gasket or O-ring dry, unless the engine manual calls for sealant.
No. It is an aftermarket water pump made to replace the Caterpillar 2W-8004. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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