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Unread 01-05-2009, 09:58 AM   #1
Abilene
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1978 CJ7 
 
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Stright Six engine size?

I recently purchased a 1978 CJ 7 project with a straight six in it. Is there any easy way of telling what size engine it is?

Thanks

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Unread 01-05-2009, 10:00 AM   #2
southshore30
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258 probably.
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Unread 01-05-2009, 10:06 AM   #3
mcmud
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Here you should be able ID the engine with this link
http://www.amcrc.com/tech/engine.html
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Unread 01-05-2009, 10:19 AM   #4
Abilene
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Thanks for the info guys, I appreciate the help.
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Unread 01-05-2009, 12:27 PM   #5
jp360cj
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it should have the CID cast into the block on at least one side
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Unread 01-05-2009, 12:30 PM   #6
jerryjeeper
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99.99% odds that it is a 258 cu. in engine.
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Unread 01-05-2009, 12:35 PM   #7
j33pman
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Quote:
Originally Posted by jp360cj View Post
it should have the CID cast into the block on at least one side
Only the V-8's had the engine size cast in the side
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Unread 01-05-2009, 01:21 PM   #8
jp360cj
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Quote:
Originally Posted by j33pman View Post
Only the V-8's had the engine size cast in the side
I didn't realize that...thanks for the info
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Unread 01-05-2009, 01:37 PM   #9
78treehugger
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My 78 CJ 5 has a 232. Are the stickers still on top of the grill? If so it will say there. Otherwise you'll need the numbers off the side of the engine and then decode them. What carb? 1 or 2 brrl? More than likely a 258 though.
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Unread 01-05-2009, 01:59 PM   #10
Abilene
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I am thinking I have a 258 but not sure. There are not any stickers on the Jeep. It has a fiberglass tub and front end. I did pull up the link above with the codes and will take a look at what is on the engine this evening. I really appreciate all the help.
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Unread 01-05-2009, 04:47 PM   #11
birddogO1
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It's a 258, 4.2L

All CJ-7's in my part of the world have them. Then again there is only 2 and one of them is mine.
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Unread 01-05-2009, 05:24 PM   #12
mcmud
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Quote:
Originally Posted by birddogO1 View Post
It's a 258, 4.2L

All CJ-7's in my part of the world have them. Then again there is only 2 and one of them is mine.
Not all '78 model had the 258. The 232 was used as well until the end of the '78 build year.
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