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Old 02-01-2013, 04:41 PM   #61
Chip Stevens
Gnarly Adventurer
 
Joined: Feb 2005
Location: Yucaipa, Ca
Oddometer: 109
Wallowa. There is always some blow by. One can even hear it when they do a compression check on an aircraft engine. My mechanic rockes the prop back and forth to get as high a reading as he can get. The last check averaged 76lbs with 90 lbs input. The manufacture says it can go down to 60 lbs as long as it is not going past a valve. The point I'm trying to make is blow by is greater then most realize. While I'm pontificating, there are some that feel the loss between the piston and the rings is larger then the rings and the cylinder walls. that would mean seating rings also includes the surfaces between the rings and the piston as well as the rings and the cylinder walls. chip
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