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ExhaustValve adjustment

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skidmk

Joined: 19 Nov 2007
Posts: 171
Location: Ottawa, Ontario

Posted: Thu Feb 28, 2008 11:04 am Post subject: ExhaustValve adjustment

HI, searched the archives and didn't come up with much.  Taking delivery of my CJ sometime in march.  The exhaust valves have not been adjusted in the last 3 annuals (these are the ones I've seen so far).. 2 cyl's are in the low 70's high 60's.



I've never done valve adjustment, where would I get the tools and the "manual"?



thanks



Mike

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_________________
Mike "Skidmk" Bourget
Ottawa, Ontario

cpayne(at)joimail.com
Guest

Posted: Thu Feb 28, 2008 2:53 pm Post subject: ExhaustValve adjustment

Exhaust and intake valves tend to tighten up as they wear down into the valve seat.  What happens is one day the prop stops when trying to start it and all your air bleeds past the stuck valve leaving you to wonder what to do next. A worse case is a bent valve, which sticks, hits the piston on the next upstroke and then ruins your whole day.

  

 All you need is a 17mm wrench and socket, along with a big flat tip screw driver and a bent feeler gauge. I use .10" clearance for normal operation and bump up to .014" or more when I'm going to be running the engine at max rpm for any period of time. Be sure and check at least one cylinder (#4 preferably) FOUR times, as each TDC comes around. Reason: there are 4 cam lobes for Exhaust and 4 for Intake. Average your adjustment.

  

 Contact Doug Sapp if you don't have a service manual.

  

  

 Craig Payne

 cpayne(at)joimail.com (cpayne(at)joimail.com)

  

  

 

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