Complete Engine Overhaul Kit
Fits 46-53 Jeep & Willys with 4-134 L engine

Complete Engine Overhaul Kit
Fits 46-53 Jeep & Willys with 4-134 L engine

Complete Engine Overhaul Kit for the "Go Devil" Motor

Highest quality guarantee complete overhaul kit includes:

New Intake Valve Guides (4)
New Exhaust Valve Guides (4)
New Intake Valves (4)
New Stainless Exhaust Valves (4)
New Camshaft Timing Gear
New Crankshaft Timing Gear
New Oil Pump
New Camshaft Bearing
New Pistons with pins (4)
New Piston Ring Set
New Rod Bearing Set
New Main Bearing Set
New Hardened Exhaust Valve Seat Insert
New Engine Overhaul Gasket set

Please specify the following when ordering:
Piston size (std - .080" o.s)
Rod bearing size (std - .080 u.s.)
Main bearing size (std - .080 u.s.)

4-134 L engine (with gear driven camshaft)

46-49 CJ-2A
49-53 CJ-3A
50-52 M38
46-49 Truck
46-49 Station Wagon
48-49 Jeepster

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Availability: In stock

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Questions & Answers

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Questions: Do You sell the complete L4-134 overhaul kit without the oil pump?
Question By: Greg Leonard on Feb 1 2019 8:19 PM
Give us a call toll free and we can set you up. 888-648-4923. Thanks
Answer By: Willys Jeep Parts Tech on Feb 4 2019 5:21 AM
Questions: Does the complete overhaul kit come with thrust washers
Question By: Glen Roseboro on Jan 11 2019 1:56 AM
Please email and i can help. The camshaft thrust plate would be a separate item. Not typically part of a overhaul kit for a motor.
Answer By: Willys Jeep Parts Tech on Jan 11 2019 6:07 AM
Questions: Head gasket is metal one side and composite the other. Which side is up?
Question By: David jordan on May 17 2018 5:59 PM
Metal side goes down.
Answer By: Willys Jeep Parts Tech on May 17 2018 11:41 AM
Questions: I am rebuilding an M38 motor. I see that my factory exhaust valves/keepers/retaining plates are different than the CJs, and this kit comes with CJ valves. So along with this kit I'll need qty4 637044 and qty8 375994? Also, are the pictures of the valve you have on this page pictures of the actual valves? Because the valves shown here look like my exhaust valves (which are supposed to be anomalies) and look nothing like my intake valves (which are supposed to be normal). Thank you.
Question By: Daniel on Mar 2 2018 2:10 PM
They used different valves thru the years for retainers or rotators. The M38 with the 4-134L head could have 802639 or 800829 valves in there. I can make up the kit for you. Please call and ask for Mike M.
Answer By: Willys Jeep Parts Tech on Mar 2 2018 6:23 AM
Questions: Sorry, one last question before buy, (Im taking the parts overseas) this parts are for enginge 641087-L-W5 A-NI-CR-N2 CC? Thank you and Im sorry for so many question.
Question By: humberto figueiras on Apr 28 2017 7:13 PM
If you have a 4-134 L head gear driven engine then it is correct.
Answer By: Willys Jeep Parts Tech on Apr 28 2017 12:17 PM
Questions: Hello, do the pistons, ring, bearing and rod bearing came in standar size? because I see all start on .20
Question By: humberto figueiras on Apr 19 2017 8:03 PM
Yes, you can select those at checkout. See the drop down box. We carry all sizes for it. Scroll down for STD.
Answer By: Willys Jeep Parts Tech on Apr 19 2017 1:23 PM
Questions: How much Weight the Package. Thanks
Question By: Humber on Feb 27 2017 4:05 PM
These weight 24 pounds 24x12x8 box size
Answer By: Willys Jeep Parts Tech on Feb 27 2017 8:27 AM
Questions: I need to order a "Complete Engine Overhaul Kit" for my '48 CJ2A. Your parts catalog lists two kits: one for a 4-134L engine with Chain Driven Camshaft part no. 134L-HEAD-CHAIN ["application 41-46 MB, GPW. CJ-2A] and another kit for 4-134L engine with gear-driven camshaft part no. 134L-HEAD-GEAR [APPLICATION 46-53 Jeep and Willy's with 4-134L engine with gear driven camshaft].... Am I misreading the first kit in that it does NOT include the 48 CJ2a??? . How can I tell which one I need to order before tearing down the engine? Also, does this kit include gaskets for head and oil pan? Or do I need to order a separate gasket kit part no. 810584 ?
Question By: Daniel Baldwin on Jul 11 2016 4:24 PM
Early 1946-47 CJ-2A's used a chain driven engine. 47 + then used a gear driven engine. Its best to check. Just unbolt your timing cover. They come complete as shown with gasket set too.
Answer By: Willys Jeep Parts Tech on Jul 11 2016 10:57 AM