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

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

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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Availability: In stock

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Question By: RAY WALLIN on Apr 15 2022 9:45 PM
You may have to check your main bearings and oil pump as well.
Answer By: Willys Jeep Parts Tech on Apr 18 2022 5:48 AM
Questions: is this the proper oil pump (804769) for a 1942 GPW? My frame number indicates December of 1942 as mfg. date. thanks..
Question By: PHIL on Dec 6 2019 7:23 PM
Yes, this is correct for the 4-134 L chain driven motor that was originally used.
Answer By: Willys Jeep Parts Tech on Dec 6 2019 1:14 PM
Questions: What is the correct oil pump for a '46 cj2a 134 engine with engine #21191 this has the timing chain?
Question By: Roy Karnes on Mar 21 2019 8:22 PM
For all timing chain motors, the correct oil pump is #804484. Thanks
Answer By: Willys Jeep Parts Tech on Mar 25 2019 7:14 AM
Questions: 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?
Question By: Blake on Mar 19 2019 6:27 AM
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.
Answer By: Willys Jeep Parts Tech on Mar 19 2019 6:08 AM
Questions: 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.
Question By: Roger Brandt on Jun 20 2018 6:38 PM
Yes, you should be able to slide out correct.
Answer By: Willys Jeep Parts Tech on Jun 25 2018 12:49 PM
Questions: 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
Question By: Chris on Mar 8 2018 7:44 PM
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.
Answer By: Willys Jeep Parts Tech on Mar 8 2018 11:48 AM
Questions: can a worn oil pump cause sputter over 25 mph, Im getting my ass kicked, has rebuilt carb and starts great
Question By: Howard on Feb 6 2013 12:00 AM
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.
Answer By: Willys Tech on Feb 7 2013 12:00 AM
Questions: 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?
Question By: Anonymous on Dec 6 2012 12:00 AM
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.
Answer By: Willys Tech on Dec 7 2012 12:00 AM