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Replacement Connecting Rod #2-4
Fits 46-71 Jeep & Willys with 4-134 engine (Out of Stock)

Part # 641775

Replacement Connecting Rod #2-4 (2 required per vehicle)

New connecting rod for both flat head and overhead valve gear driven motors. For #2 or #4 pistons ensures proper oil port hole.

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

These are a rough cast connecting rods with some pitting on the machine surface and may required additonal machining.

Part # Price





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i need to know if do you have this part in stock

Willys Jeep Parts Tech:
No, we are unable to get this part.

please explain what type of additional machining is required to this connecting rod. thank you

Willys Jeep Parts Tech:
They need to be properly weighted to have a match set and honed.

My CJ-3b has an F-head engine cobbled together in the 1970s. When I pulled the oil pan I discovered that it has two different sized bolts in the piston rods (no wonder it vibrates). Will this require changing out the oddball pistons/rods so that they match?

Willys Jeep Parts Tech:
Yes, that is what i would do and make sure they balance out too.

so my rod #4 is a little beaten from being forced out via hammer but all my rods are balanced will buying an not balanced rod affect anything

Willys Jeep Parts Tech:
You would want to make sure all your rods are balanced to prevent any unnecessary vibration or wear.

My willys repair manual describes the stock connecting rods as forged units. These are described as cast. Is there a difference?

Willys Jeep Parts Tech:
This is just how they are currently made in new manufacter.

Can I use these connecting rods on a Willys Jeep engine (S/N MB356715)?

Willys Tech:
This is for all 4-134 L & F gear driven engines for Willys.
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