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Unread 10-19-2009, 05:56 AM   #1
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1976 CJ7 
Join Date: Oct 2009
Location: barrie
Posts: 3
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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Unread 10-19-2009, 07:48 AM   #2
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1998 XJ Cherokee 
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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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Unread 10-19-2009, 09:16 AM   #3
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1974 CJ5 
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Location: Lorton, Virginia
Posts: 2,871
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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Unread 10-19-2009, 10:36 AM   #4
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1973 CJ5 
Join Date: Aug 2007
Location: South West Indiana
Posts: 11,137
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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Unread 10-19-2009, 10:42 AM   #5
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1978 CJ7 
Join Date: Dec 2007
Location: Burnsville, MN
Posts: 2,812
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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