258 valve issues

258 valve issues

wolfclan

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Charleston SC
Vehicle(s)
86 CJ7 258 AMC20(for now) 5spd mostly factory.....but hey, I've only had it for 3 months!
Pulled the head off my 258 today and this is what I found :mad: .....

photo.php
photo.php


Thoughts? I'm considering doing the 4.0 conversion instead of rebuilding this one. Any recommendations on where to get one already built with the passages blocked off?

Note: evidently I am technically challenged as I can't get the photos to load here. Here is a link to them on my FB page: http://www.facebook.com/media/set/?set=a.4317349306174.162951.1660256236&type=3I
http://http://www.facebook.com/media/set/?set=a.4317349306174.162951.1660256236&type=3

also have pics of the block and the spark plugs posted. I lost oil pressure (pump is 3 mos old) and was hearing a knock from the lower end and the valve train was rattling something fierce. Thanks for any input!
 
Last edited:
Pulled the head off my 258 today and this is what I found :mad: .....

smiley-violent064.pngsmiley-violent064.png

Thoughts? I'm considering doing the 4.0 conversion instead of rebuilding this one. Any recommendations on where to get one already built with the passages blocked off?






smiley644.png, sorry man, just having a little fun at your expense. I can't see either of the pictures. It may be because the pics are from facebook, but I'm not 100% sure.
 
If oil pressure went suddenly, you might have spun a crankshaft or rod bearing.

Clattering and knocking sounds like a 4.0 transplant is in order.

If the bearing spins, you lose all top end oil pressure.
 

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