My 170 Champion engine (1950) has a couple cylinders with sub-par compression. Number four registers 90-95 Lbs. and #6 reads 75-85. According to the manual, they are supposed to have 125 Lbs. I am hoping that I just have some sticky or carboned valves.
A couple guys have told me that Sea Foam would be worth a try. The instructions on the can say that you should pour about a third of a can down the throat of the carburetor while the engine is warm and running. Then shut the engine off, let it sit for five minutes, start it up and let it run a while. I am prepared for a huge smoke cloud. Has anybody tried this? Any cautions or warnings? Does anyone have any better ideas that don't involve removing the head? If this miracle cure doesn't work, is a valve job likely needed?
1950 Champion 4 Dr.
Holdrege NE
A couple guys have told me that Sea Foam would be worth a try. The instructions on the can say that you should pour about a third of a can down the throat of the carburetor while the engine is warm and running. Then shut the engine off, let it sit for five minutes, start it up and let it run a while. I am prepared for a huge smoke cloud. Has anybody tried this? Any cautions or warnings? Does anyone have any better ideas that don't involve removing the head? If this miracle cure doesn't work, is a valve job likely needed?
1950 Champion 4 Dr.
Holdrege NE
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