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Unread 12-14-2013, 09:56 AM   #1
climberman
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1979 CJ5 
 
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Rear main Seal

I need to change the rear main seal and have a couple of question. Everyone at the auto-zone needed to know if I have a single or a double seal. How do I know?? It is harder to change a single we have a 258 I think it is an 1980 but then doing some research I think it is a 232 from around 1979 we bought it from a kid that had it in a CJ7. Here is the code on the block. 906 E 16

Thanks

Rocky

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Unread 12-14-2013, 12:12 PM   #2
LumpyGrits
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IIRC, the only '6' then was a 258. Doesn't mean a 232 hasn't been put in somewhere along the line.
Best to pull the seal out, and take it with you.
Stay away from that China made crap!
NAPA is where I would go
LG
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Unread 12-14-2013, 01:28 PM   #3
climberman
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Thanks I bought both because when I pull the pan I want to finish the job. The question is does the 232 have a seal that is one piece. And if so how hard will it be to change. Is it the same or harder then the two piece
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Unread 12-14-2013, 02:06 PM   #4
WindKnot
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It's the same part.

The two piece seal is easy. If it's a one piece you'd need to remove the crankshaft and all that entails. You don't want that.
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Unread 12-14-2013, 03:43 PM   #5
climberman
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I hate to keep asking the same question you mentioned that it is the same part so am I going to find a 2 piece rear main on my motor. Because it is like you said you don't want it to be a one piece. I think the auto parts just have me nerves because they gave me two different seals and said one of them is a single piece. But when I open them bother up they are both two piece. They are a little different there is a grove in one of them but I should have the right one.
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Unread 12-14-2013, 04:47 PM   #6
strvger01
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the 232 and 258 engines shared the same basic engine block. should work for you.
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Unread 12-14-2013, 05:03 PM   #7
climberman
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Thanks for all help Monday is the day a friend is letting us put on his lift so that will make it easier.
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Unread 12-14-2013, 05:10 PM   #8
WindKnot
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A two piece seal is easy. The big NO NO is to scratch or mar the crankshaft. You can avoid doing this by pushing the old sea out with a wooden dowel or something similar like plastic. And don't force anything. You can lube the outside with dish soap and the inside with oil. (I used assembly lube.)

If your buddy has a lift, it sounds as if he's no amateur. He'll/you'll do fine. Just take your time.
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Unread 12-14-2013, 05:15 PM   #9
climberman
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Right he restores cars as a hobby and he will be there. Will be slow and careful for sure.
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