View single post by BILLBEN
 Posted: 06-30-2005 12:26 pm
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BILLBEN

 

Joined: 06-28-2005
Location: WINDSOR, Connecticut USA
Posts: 10
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 I have been unable to get adequate compression on 2 of the 4 cylinders on my 1974 J.H.

This happened after I attempted to change the timing belt, which I have done successfully on 2 previous occasions but this time ended up, accidentally, moving the crank and both cams as the belt was coming off. As a 1974, the book calls for 110 degress on intake and exhaust. But no matter what combinations I try, regarding the number of degress before or after TDC, or 110 degrees vs. 115 degrees intake and exhaust on the cams in any combination, compression on cylinders 1 and 4 consistently read between 110 and 130 lbs. and on numbers 2 and 3 from 60 to 75 lbs.

Knowing it is an interference engine, I have always turned the crank by hand before using the starter, yet it seems I must admit that there are damaged valves on cylinders 2 and 3. Does anyone have any other thoughts or suggestions?!? After many, many hours, I am now at a total loss.

Thanks, Bill