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Old 01-18-2013, 07:27 AM   #15 (permalink)
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Oh, I thought you wanted to increase the compression ratio. To restore some lost compression from bad rings what we did back in the day was pour a qt of motor oil down the carb, much like the guy poured the can of water. It made a hell of a lot of smoke, but the resulting bath helped the rings as well as valves.

The compression test wet vs dry will tell you right away if its valves or rings thats the cause.

Originally Posted by Daox View Post
If you have low compression and free up any carbon build up, you're only going to make your low compression worse. Chances are that carbon is helping keep compression up.
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