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Old 09-25-2012, 08:12 PM   #1
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Question About an CJ -3A Engine

Hello, new here and I am trying to buy a 1951 Willys but am not sure about the engine. The body looks OK but the enging has quite a bit of rust on the exterior. I have not been able to inspect it up close (only seen pictures)but was wondering what the general opinion is on engines covered in rust. Hopefully the picture shows up. I fine with working on cars but have no experience when it comes to significant rust. Thanks for any advice you can give.


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Old 09-25-2012, 08:55 PM   #2
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Does it turn over by hand. Is it seized up? As long as the inside is rust free. A little surface rust isn't a big deal

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Old 09-25-2012, 10:30 PM   #3
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These are stupid simple. If it turns that's a good sign. My total rebuild was 1500.
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Old 09-27-2012, 09:00 PM   #4
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I've seen a lot worse that ran. I wouldn't be worried too much about the surface rust, just make sure it turns over, that will give you an idea of what the inside is like. More than likely you would be rebuilding it or getting a different engine anyway. If the price is right I'd do it in a minute if it was anywhere near.
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Old 10-03-2012, 10:35 AM   #5
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I would suggest that before you even try to see if it turns over, pull the air horn and make sure the carb isn't full of debris and then pull the plugs and give each cylinder a good shot of PB Blaster or something similar, followed by a couple tablespoons of Marvel Mystery oil in each. Only then try to turn it over with plugs still removed. If it does have some cylinder rust, it will reduce scuffing by the rings and also free them up.

Easy to rebuild, but don't count on that increasing the power much-nothing to speak of there even when in perfect shape. Best rebuild kits are those for a small block Chevy
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Old 10-03-2012, 10:43 AM   #6
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Quote:
Originally Posted by duffer View Post
I would suggest that before you even try to see if it turns over, pull the air horn and make sure the carb isn't full of debris and then pull the plugs and give each cylinder a good shot of PB Blaster or something similar, followed by a couple tablespoons of Marvel Mystery oil in each. Only then try to turn it over with plugs still removed. If it does have some cylinder rust, it will reduce scuffing by the rings and also free them up.

Easy to rebuild, but don't count on that increasing the power much-nothing to speak of there even when in perfect shape. Best rebuild kits are those for a small block Chevy
If I remember right those engines are about 60 hp.

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