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New Replacement Oil Pump
Fits 41-46 MB, GPW, CJ-2A

Part # 804769

New Replacement Oil Pump

For early chain driven "Go Devil" motors. Guaranteed proper for your military build.

4-134 L engine (chain driven)

41-45 MB
41-45 GPW
46 CJ-2A

Related Parts:
See hardware kit - 375981 and gaskets - 646147 & 641482.

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I have a 2A 134 and it has a gear for cam drive but the oil pump looks just like chain drive one Can I put main bearings in with out pulling the motor?

Willys Jeep Parts Tech:
There wouldnt be a way for you to have a chain pump in a gear engine because the camshafts are different. Give us a call and we can help you.


Willys Jeep Parts Tech:
You may have to check your main bearings and oil pump as well.

Have a oilpump in My 45 willys is stamped GPW 6604 can I Get a new reales piston and spring for this . And if where did I find IT on your page

Willys Jeep Parts Tech:
356155 is what is available. Or we have complete oil pumps.

is this the proper oil pump (804769) for a 1942 GPW? My frame number indicates December of 1942 as mfg. date. thanks..

Willys Jeep Parts Tech:
Yes, this is correct for the 4-134 L chain driven motor that was originally used.

What is the correct oil pump for a '46 cj2a 134 engine with engine #21191 this has the timing chain?

Willys Jeep Parts Tech:
For all timing chain motors, the correct oil pump is #804484. Thanks

Hi Blake here I have a 52 Willys with a 1939 chain driven Willy's engine everything appears to be the same as the change of them blocks in the early Jeeps I'm wondering if this replacement oil pump is indeed a high-flow like the one offered for the gear driven engines my Jeep now has a turbocharger on it and I'm trying to figure out if I can get slightly more oil pressure before we did an engine rebuild and resealed the oil pump it seem to build more pressure than it does currently after resealing it and putting it back on the engine is there something we could have done wrong during assembly?

Willys Jeep Parts Tech:
These will put the proper amount of oil pressure for the 4-134 motor and have a high pressure relief valve as well. Sounds like it may not have been primed prior to install.

I need to drop the oil pump in my '42 GPW with L-134. Can I get the oil pump out while the engine is still in the looks like there should be enough room between the block and the frame.

Willys Jeep Parts Tech:
Yes, you should be able to slide out correct.

Trying to get oil pump off of cylinder block to replace - can this be done externally w/o getting into engine? (I have removed 3 bolts and faceplate on outside of engine - it is still stuck up aga engine really tight...) Thanks for help

Willys Jeep Parts Tech:
It should slide down. Keep in mind the notch on the end of the oil pump goes into the tooth on the end of the distributor too. This can cause it to stick as well as the gear to gear contact on the camshaft.

can a worn oil pump cause sputter over 25 mph, Im getting my ass kicked, has rebuilt carb and starts great

Willys Tech:
I wouldnt think so, it really will just give poor oil pressure. But if you have chipped/broken teeth on it then it could be doing serious damaged to your camshaft and cause vibration or worse.

My MB starts up and oil psi quickly goes to 40 -- after driving a while the psi drops to about 12 - 15 psi and remains there unless the speed is increased; However, it does not reach 40 psi. Is this normal or is there cause for concern?

Willys Tech:
It shouldnt ever go over 40, the relief valve opens at 40. At idle minimum safe pressure is 6 psi at idle. At 2000 rpm (35 mph) it should be at least 20. So it sounds like you are ok.
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