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New Replacement Oil Pump
Fits 46-71 Jeep & Willys with 4-134 engine

Part # 804484

New Replacement Oil Pump

For both flat head and overhead valve gear driven motors. Guaranteed proper high volume pump for proper lubrication.

4-134 engine

46-49 CJ-2A
49-53 CJ-3A
53-64 CJ-3B
55-71 CJ-5
50-52 M38
52-66 M38A1
46-53 Truck
46-53 Station Wagon
48-51 Jeepster

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I have a134F Head engine that looses oil preasure when it heats up about 180 degrees is it it time for a new oil pump?

Willys Jeep Parts Tech:
Yes and I would check your rear main for any leaks as well.

I got a replacement oil pump and the gasket matches the mounting holes but the oil flow holes are partially covered by the gasket. Will that cause any problems with flow rate?

Willys Jeep Parts Tech:
No it will not cause any issues.

i have a problem with my disturbator, being loose, how do you make sure it is seated into the oil pump? it has no way to tighten down. sorry about my spelling.

Willys Jeep Parts Tech:
You need to pull the oil pump and inspect for wear. Then seat the two out of the engine to make sure it seats properly then reinstall.

Is this for the gear driven camshaft L134?

Willys Jeep Parts Tech:
Correct, this is the gear driven oil pump.

I have a 1957 CJ3B could you tell me if the F134 engines were originally timing chain or gear driven and what serial # did they change.

Willys Jeep Parts Tech:
All 4-134 F heads were gear driven.

I order a new oil pump and a gasket that goes between the oil pump and block. I also receive the cover gasket which I didn't order. Does the new pumps come without the cover gasket installed? I can't seem to tell if there is one there or not, but I don't want to remove it unless that is how it is shipped because who know what will fall out if I do.

Willys Jeep Parts Tech:
Yes, they should have the gasket on the cover plate from the manufacturer.


Willys Jeep Parts Tech:
Yes, you should have the clearance you need to drop it.

How much does it weigh ? Regards.

Willys Jeep Parts Tech:
apprx 4 pounds unboxed.

Will this pump fit a continental y112 engine? It is in a kohler genset. Thank you

Willys Jeep Parts Tech:
Unless they use the same 4-134 motor I dont believe so.

Hello, Does this pump deliver a higher volume than the original?

Willys Jeep Parts Tech:
These provide the correct amount of oil pressure for you 4-134 motor.

Does the new gear set come with a new pinion nut, Will the stock U bolts from the old yoke work?

Willys Jeep Parts Tech:
No, you will need to buy the pinion nut separately. And you will have to change out the yoke to a fine yoke but that comes with the ring and pinion. Thanks

Hi, I have a Kaiser Supersonic engine ( I believe it was a replacement ) in a 46' Cj2a with this oil pump. I need the oil pump cover gasket for this pump, and I am having trouble locating one. Do you sell the cover gasket for this pump ? Thank you, Justin

Willys Jeep Parts Tech:
Sorry, I dont have just the cover gasket for that pump

where are these made?

Willys Jeep Parts Tech:

Can the oil pump be replaced without having to pull the engine (i.e. just drop the oil pan)? If so, will the distributor need to be pulled to remove the pump?

Willys Jeep Parts Tech:
Yes, you can pull it out. Just make sure you note the position of your rotor and notch on the oil pump when reinstalling in case it shifts.

Do you have any information on how to correctly install the oil pump on an engine that has had the original pump and distributor removed?

Willys Jeep Parts Tech:
Make sure your timing is set properly The tooth on the end of the distributor fits into the notch on the oil pump. Make sure to prime your oil pump too. If you like i can email you information on timing your motor too.

I'm replacing the oil pump this replacement pump looks somewhat different bolt patterns match however there is a notch in the shaft of the original that is not in the replacement pump why is this

Willys Jeep Parts Tech:
It will bolt right up. There are different versions used thru the years 46-71. Thanks!

Are you aware of any problems that could arise with the pump or the engine if I use this pump and synthetic oil on an F-134 1962 Willys?

Willys Jeep Parts Tech:
We use 10W-30 non synthetic.

4-134 engine for 51 pickup. One drive tooth is chipped, can I replace just the gear?

Willys Jeep Parts Tech:
No, you would need to replace entire oil pump and check your camshaft as well.

i am guessing the tooth on the distributor shaft is off set along with the slot on the oil pump

Willys Jeep Parts Tech:
Yes, that is correct.

I bought a new pump for my L134 willys motor. The gear on the end is the wrong angle. Can I just change the gear or are the two different pumps for this motor?

Willys Jeep Parts Tech:
That is the difference between chain v. gear driven motor/camshaft. Please call us toll free and we can help.

My CJ2A is serial number 10618. Is oil pump 80434 the correct one to purchase?

Willys Jeep Parts Tech:
Its always always best to check if your chain driven or gear driven motor. Just remove the timing cover to check it. That appears early though.

Do you have a rebuild kit for this pump?

Willys Jeep Parts Tech:
No, I'm sorry. No one makes a rebuild kit for the oil pumps. Thanks!

hellos, what is the normal pressure of this pump? thank you.

Willys Jeep Parts Tech:
For the 4-134 engine minimum safe pressure is 6 psi at idle. at 2000 rpm it should be 20 psi minimum. Normal oil pressure is 35 psi at 2000 rpm.

My 49 willy jeep seems to have good oil psi when cool it is at 40 psi as it warms up the psi drops to 15 and some time 0 one the gage can it has sat fore 5 years . It started rite up and runs good and sounds good no lose of power it has new oil in it 10w30 is there a way to test the oil pump are can a gage case me a falls reding when it warms up the oil psi gose up when revd up to 30

Willys Tech:
Your oil pressure should always rise with more rpms...I would replace the gauge before you run it again to confirm you are not loosing pressure and doing damage to the engine.

I get a very (very) low flow of oil to the valves. Some what better to the gauge. Is there anyway to clean these oil lines that are in the block lines.? Can you force air in the reverse direction and hope to clean the lines?

Willys Tech:
Yes you can always tank them and blow them out with compressed air after removing them.

can the oil pump be removed without it affecting the timming with the engine stil in the jeep.

Willys Tech:
Yes, as long as you slide it out and I would mark its position so you can get it to line up with the tooth of the dist.

How can I check to see if oil pump is bad

Willys Tech:
The best way to check is by your oil gauge. You can also remove it and check for any damaged teeth on your old one.

Does the oil pump drive the distributor shaft?

Willys Tech:
Yes. The end of your distributor shaft has a tooth that fits into the slot on the end of the oil pump.

Does this pump include any necessary mounting gaskets?

Willys Tech:
Yes that is correct.

Do you ship to Brazil?

Willys Tech:
Yes, we ship daily USPS and UPS international.

will this fit a belt driven

Willys Tech:
I think you mean chain driven motor. This is for gear driven. The early chain driven pump part number is: 804769

Will this pump fit any 4-134 F head engine?

Willys Tech:
Yes, this is the proper replacement pump for any 4-134 engine. It is a direct bolt on pump and hi-flow.
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