identify a "free" 232/58 -

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post #1 of 5 Old 10-19-2009, 04:56 AM Thread Starter
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1976 CJ7 
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identify a "free" 232/58

i'm trying to figure out if an engine is a stock 232 or 58. what are tell tale signs if there are any? The trannys a stock 3 speed. Are all the vacuum lines the same? if theres a thread about this sorry i couldnt find it.

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post #2 of 5 Old 10-19-2009, 06:48 AM
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It's basically the same engine, except the 258 is stroked.

So it should look identical.

The only way to be certain would be to measure the stroke or do a compression test.

140 for the 232, 150 for the 258 -- in a perfect world though.

It may not actually help you much if it has lower compression than normal.

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post #3 of 5 Old 10-19-2009, 08:16 AM
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Here's how to decode the engine numbers and figure out exactly what it is: Jeep CJ VIN / Casting / Production Numbers
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post #4 of 5 Old 10-19-2009, 09:36 AM
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There are also other signs,
258 often had 2 barrel carbs, where all 232 engines had 1 barrel carbs,
Stuff like that...
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post #5 of 5 Old 10-19-2009, 09:42 AM
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There is a stamped code, passenger side, front of engine & infront of Distributor, and middle of engine is height. There is a small flat milled area, they stamp the engine code there. That will tell is 232 or 258 and it started at 1 bbl or 2bbl. The engine codes are well published.
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