Kaiser Willys Jeep Parts
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Thread: Engine identification ?

  1. #21
    Senior Member
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    Jan 2015
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    The military did what the military does...just caused more confusion. According to the military manuals the MB and GPW engine put out 54 HP at 4000 rpm and the M38 engine put out 51 at 4000 rpm. Both claimed 6.48:1 compression ratio. I did find 2 different manufacturer part numbers for cylinder heads in those books. I like the numbers in the CJ books better.

  2. #22
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    Jan 2015
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    I have been learning a lot the last few days while researching the heads. Not hard since I didn't know much to start with but one of the surprises was finding the CJ3A listed as a military vehicle 2 pages after the MB and the page before the M38 and again on the very next page (TM 9-2800-1 pages 151-155). It is the only "CJ" specifically called out in that manual (1953).
    Last edited by 51 CJ3; 01-26-2018 at 10:20 PM.

  3. #23
    Super Moderator gmwillys's Avatar
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    Aug 2017
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    Here is a listing for a duel carb set up for the Willys L head. Performance parts are out there, but few and far between.

    http://www.ewillys.com/2018/02/02/bu...ebay/#comments

  4. #24
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    That’s cool. And very tempting to bid on.

  5. #25
    Junior Member
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    Feb 2018
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    just bought a 53 m38-a1 has kaiser willys supersonic 4l134 engine with L head is this correct engine for the m38a1

  6. #26
    Super Moderator gmwillys's Avatar
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    The correct engine for the M38A1 is the 134 F head.

    M38 engine;
    https://www.kaiserwillys.com/diagram...-l-head-engine

    M38A1 engine;
    https://upload.wikimedia.org/wikiped...bulance_el.jpg
    Last edited by gmwillys; 02-12-2018 at 06:38 AM.

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