Double Groove Crankshaft Pulley
Fits 41-71 Jeep & Willys with 4-134 engine

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Double Groove Crankshaft Pulley
Fits 41-71 Jeep & Willys with 4-134 engine
New Double Groove Crankshaft Pulley

Proper style double groove pulley for multiple belt applications. Originally used for M38 & M38A1. Fits both flat head and overhead valve motor.

4-134 engine

41-45 MB
41-45 GPW
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

Note: Must be machined for proper fit prior to install.
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Questions: Will this pulley fit a L134 motor with gear driven timing cover with the dust baffles? My original has 2 grooves (small and large) and fit just on just past the baffles.
Question By: Kris Kyzer on Apr 5 2018 12:54 PM
Please email and we can get your vehicle information and help out.
Answer By: Willys Jeep Parts Tech on Apr 5 2018 6:13 AM
Questions: Is this the correct crank pulley for an M38 or A1, with both belt sheaves the same width? My understanding is that there is also a CJ double pulley that has one wide and one narrow sheave for use with Jeeps equipped with governors. Please verify as I am looking for M38, with double gen and water pump pulleys.
Question By: Mark on Sep 17 2016 8:01 PM
Yes, this is for the M38 and M38A1. We also sell part number: 646699 too
Answer By: Willys Jeep Parts Tech on Sep 19 2016 5:47 AM
Questions: Is this pulley considered the harmonic balancer as well?
Question By: Dave on Oct 22 2014 12:00 AM
Yes some people do call it that.
Answer By: Willys Tech on Oct 23 2014 12:00 AM
Questions: Does your company sell a bolt on timing pointer for the L134 engines? Or is there a any suggestions on how to set TDC on the pulley? Thanks
Question By: Lucas on Apr 24 2014 12:00 AM
They really dont make anything like that. You should be able to get that from your flywheel markings.
Answer By: Willys Tech on Apr 29 2014 12:00 AM
Questions: I have a 46 CJ2A that I have had for years... It runs great & lots of fun, until I heard a noise coming from the crank pully. I removed the fan belt and noticed that the pully was very loose and rotated back and forth on the crank shaft ?? I tried tighting the crank shaft bolt which was tight and did not fix the problem? Do you think the pully key failed or do you think the pully & key need to be replaced? How do you get the old pully off without damaging it? What kind of puller do I need?
Question By: Richie on Jan 17 2013 12:00 AM
There is a key that locks it into place. That is probably worn. I would take a look at that. You will probably have to go buy a puller to get it off.
Answer By: Willys Tech on Jan 17 2013 12:00 AM
Questions: Hello good day my question isif the Crankshaft Pulley have the timing mark thanks best regards
Question By: Jose Reynoso on Jan 1 1970 12:00 AM
No they are not marked.
Answer By: Willys Tech on Apr 6 2012 12:00 AM
Questions: What machining is required for proper fit? Do you sell the key that goes between the pulley and the crank? Are the sheaves for wide or narrow belts?
Question By: Kirk on Jan 1 1970 12:00 AM
They are for the narrow belts. You have to lathe the inside diameter hole to fit.
Answer By: Willys Tech on Jan 18 2011 12:00 AM
Questions: Is the pulley diameter wide enough to fit an M38A1? Original is 6 3/8.
Question By: Jasper on Oct 23 2010 12:00 AM
Yes this should work just fine for it.
Answer By: Willys Tech on Oct 25 2010 12:00 AM