Re: broken top compression ring

Posted by Tim Cole On 2013/10/16 0:47:44

Non-detergent is better in a worn motor that has a lot of blow by. The water blow by doesn't emulsify and lays on the bottom of the pan. Non-detergent helps in heavily sludged motors that would otherwise turn detergent oil into waste upon startup.

Detonation due to carbon can break rings, as can revving fast enough to hit a carbon ridge. The same way as the excessive taper suggestion. If the ring grooves are worn and the carbon breaks away the force of combustion will not fall evenly and break the ring like a lever. If one side is stuck that can break them as well. I saw a number of motors that broke rings after sitting because the rings were stuck.