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94 ZJ Over Heated now has rough Idle

Old 08-19-2009, 01:07 PM
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Default 94 ZJ Over Heated now has rough Idle

My fathers 94 ZJ over heated last week when one of the rad hoses went out, now it idles and runs rough for him, which it did not do before it overheated. Anyone have any ideas. Thanks
Old 08-19-2009, 02:15 PM
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More than likely blew the head gasket and may have done internal damage or warped the head as well.
Old 08-19-2009, 10:00 PM
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Mine overheated and was running very rough. It blew the head gasket, two pistons were scoring the cylinder walls and water was leaking out the #1 cylinder exhaust manifold.

Bottom line;

Used engine $600.00
re-manufactured engine $1800.00

Overall cost of replacing the engine $3000.00

Good luck!
Old 08-19-2009, 10:01 PM
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Forgot to mention in my last post that the head was very warped with a big crack across #6 valve seat
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