Thread: Help! Low compression in 4th cyl.
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Old Jun 11, 2003 | 09:55 AM
  #8  
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LT
The deer had to die!
 
Joined: Jun 2002
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From: Fussa, Japan
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it's definitely a leaky seal: spark plug o-ring, piston ring.

i'll even say possibly the exhaust valve is out of spec and opening during compression.
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