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Message: <blockquote data-quote="Tazza" data-source="post: 1735" data-attributes="member: 82">Well, i was told i should check the head bolts after a few hrs of operation to make sure they are still rite, this person wasn't a mechanic though (he was in his own mind).It always did have a bit of blow by, especially under load it choofs a bit of smoke out of the breether tube. I will hopefully borrow a compression tester this week and check it out. The compression can't be too bad, as it does start with a 15-30 second glow. Wouldn't worn rings or a scored bore cause the oil to go black quickly as carbon will be passing by the rings? the oil is still a nice honey colour, only slightly brown.Hopefully i can get it running reasonably soon, i don't want to keep this machine, i'm in the process of re-building another one this one is going to be used as a guide of where bits go.So, what should i do on the engine i re-conditioned (for use in another machine), should i just leave the head bolt torque where it is or check after it has been run in? It too took about 15-30 seconds of glowing to start (i have only run this engine for about 3-5 mins), but i have been told the compression will be lower untill it has had a chance to wear in, then it will be good.</blockquote>