Author Topic: Zero compression front  (Read 132 times)

Rick

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Zero compression front
« on: July 15, 2021, 03:03:16 PM »
Hey All I have '82 with 70K miles.  After sitting for a few years got it up and running.  1st ride about 5 miles motor started making knock from front head area.  Zero compression from front great compression rear. IDEAS?!?!?!

Walt_M.

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Re: Zero compression front
« Reply #1 on: July 15, 2021, 05:51:17 PM »
First guess would be a stuck or bent valve. pull the cam cover and check valve clearance.
Whale oil beef hooked!

fret not

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  • Mike Lewis - Grass Valley CA
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Re: Zero compression front
« Reply #2 on: July 15, 2021, 10:17:27 PM »
Disfunctional cam chain tensioner?  Could be the chain 'slipped' a couple teeth on the cam.  Walt is correct, remove the cam cover and check valve clearances, and look around in there for any clues. 
Retired, on the downhill slide. . . . . . . . still feels like going uphill!

fret not

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  • Mike Lewis - Grass Valley CA
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Re: Zero compression front
« Reply #3 on: July 26, 2021, 11:14:18 PM »
So Rick, what have you found?
Retired, on the downhill slide. . . . . . . . still feels like going uphill!

 

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