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Factory Reground Crankshaft Kit (with main & rod bearings)
Fits 46-71 Jeep & Willys with 4-134 engine (gear driven)

Part # 647078

Factory Reground Crankshaft Kit

Comes complete with new complete matching main and rod bearing sets to factory spec. Crankshaft is professionally reground and packaged for delivery. Save yourself a lot of shipping charges

For both flat and overhead valve four cylinder motors.

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

Please allow 1-2 weeks for delivery on this item.



-A fully prepaid return label will be included in the box.
-Just put your old case housing in the same box we send you and return your old core.
-As soon as we get it back we will refund you back the $500 core fee.
-Please make sure to package it properly to prevent damage.

Part # Price





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Do you buy cores outright? I have three that I don't need. I don't need a new one, these are just extra. One has been ground once while the other two are standard, but all three need to be ground before using.

Willys Jeep Parts Tech:
Email to help out. Thanks!

Hello, so it's the price of the crank plus the additional $500 core fee.?

Willys Jeep Parts Tech:
That is correct but that core fee is 100% refunded once we received your old crankshaft. Thanks

What oil hole do I need to drill if I have the timing chain crank and want to use it with timing gear?

Willys Jeep Parts Tech:
Please email and we can try to help out.

Bare stripped block? I can see the ones that have been populated. But how can you tell about a bare stripped block? What kind od cam?

Willys Jeep Parts Tech:
Not sure I understand the question. Please email and I can try to help. Thanks!

I see that you typically use a 3" foam for the CJ2A front seat bottoms. Would it be possible to get a 2" thick foam front seat bottom (cover and cushion)? This would allow for just a little more room. Thanks.

Willys Jeep Parts Tech:
Yes, we can do that. Please call us toll free and we can accommodate.

I have several L134 blocks. some have parts on them but one is bare. How can I tell if it is a chain or gear type?

Willys Jeep Parts Tech:
The front timing is where you can tell. If its gear to gear or chain. Or you can look at the oil pump if its there and see the orientation of the gear.

Is this item in stock and available to ship?

Willys Jeep Parts Tech:
The crankshaft usually takes us about a week to ship. Thanks

How can I tell if I have a gear driven crank or a timing chain crank

Willys Jeep Parts Tech:
Take the timing cover and see if your gear to gear or have a chain.

I have two L-134 engines. One is a new casting. One crank shaft has the bolt on counter weights and the other is completely cast. What are the difference between the two and are they interchangeable?

Willys Jeep Parts Tech:
They will interchange with each other. Just double check your dowel pins to the flywheel to make sure it matches there.

Are these blocks made in the USA?

Willys Jeep Parts Tech:
These are reground original cranks so yes, they are US made.

I would like to know what the postage is to Sarasota, Florida, 34249, and what is the shipping weight?

Willys Jeep Parts Tech:
These are oversize and $50 to ship. They weigh approx 65 pounds.

WIll this crank work in a 134 timing chain motor?

Willys Tech:
We can do one that will for you. Please call us toll free.

Do you know the size of standard main and rod bearing surfaces?

Willys Tech:
This varys depending on the crankshaft. They are factory reground and typically come in between .020-.040" u.s.

1954 willys jeep works for cj and its weight

Willys Tech:
Yes this is correct for all the vehicles listed above.

Will the crankshaft from a L 134 that had a timing chain work for a F 134 that has a timing gear

Willys Tech:
Yes, but you will have to drill the oil hole. A crankshaft from any 4-134 gear driven are the same L or F.

Is ther any other bolts in the crank to flywheel other than the 2 pins?

Willys Tech:
Also try part number: 632157

i have 1953 willys with overhead valve motor what size is it

Willys Tech:
134 cu. in.
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