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Message: <blockquote data-quote="Tazza" data-source="post: 48518" data-attributes="member: 82">Blow-by is the gas that passes by the piston rings. In a good engine there should only be a small amount, in a worn engine there will be more.The wet exhaust does lean towards an injector or even a sticky valve or pitted seat causing not enough compression to burn the fuel.If there are no bubbles in your over flow pottle or coolant loss, i would doubt the head is cracked.A 10 second glow is good, you could go longer, i generally do 15-20 sometimes more if its stone cold. It just makes it fire up faster. It all depends on the engine condition too, if its lower on the compression scale, it needs more heat.</blockquote>