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Identifying A Strange Looking Engine Block

• CATEGORIES: Engine, Features, How To

Brian wrote me asking if I knew what type of engine this was.  He pulled it out of a old WWII Jeep and didn’t recognize it.  He wrote that the Head cast was #634816 and the block casting#630282. In particular, he noted the exposed cylinder tubes.

I told him I didn’t know what it was, and confessed that I had never worked with any MB/GPW motors, but I would do my best to figure it out (I do enjoy a good internet hunt). After searching through various images I could see it was similar to a MB and GPW motor, but was also different.

For example, you can see examples of GPW heads here at Dino’s site and though it looks similar, it’s missing various features.  Here is an example of MB block.  In fact, if you go here, you can review all kinds of WWII engines.

After trying various keyword images searches, I tried typing in the casting numbers and that is when I discovered that the head was a pre war head from a Willys Model 37. So, then I looked at prewar Willys.  On this page http://clubs.hemmings.com/clubsites/wocv/willywilly/willywilly.htm on the fourth pic down, you can just make out, just below the distributor, similar indentations on a 1938 Willys.  Here is a better look at a prewar block.

 

10 Comments on “Identifying A Strange Looking Engine Block

  1. mark

    That’s one beast of a flathead. There’s a new internet game called, Stump Ewillys. So far not too many have been able to stump da’ master.

  2. Brian Parmeter

    This engine turns freely,sounds like it has compressiom when it is turned over.Homemade motor mounts.make offer

  3. Brian Parmeter

    When I got this one, I thought I had something very rare.So I brought this one home to Kennewick wa,just over the state line from Hermiston Or.Brian 509-460-2577

  4. Brian Parmeter

    No worrys,the stuff in hermiston is not for my collection,just parts.The really good stuff comes home for good.I am always looking for the weird,so this one I thought,I would keep.So far what I thought was a 46 vec,has turned out to be this engine,T84,gpw t18,mb axles/frame,and a vec tub.

  5. Brian 58 cj3b

    “Brian wrote me asking if I knew what type of engine this was. He pulled it out of a old WWII Jeep and didn’t recognize it. He wrote that the Head cast was #634816 and the block casting#630282. In particular, he noted the exposed cylinder tubes”

    Interesting, Could this be an early jeep that the factory put this engine in?
    Don’t throughout the baby with the bath water. I would try to see if early MB engines were in short supply and Car engines were use until supply and demand were in sync.

  6. mmdeilers Post author

    If they did, I’ve never heard of it. It wouldn’t be the strangest thing they ever did. However, I’d think if it was put in during production that it would be a 40 or 41 engine.

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