A friend of mine remove the AIR system from my 87 blazer. He also did the valve guide seals at the same time. Now that its finished it smokes more (way more) than before. He feels certain the seals were done correctly. The odd thing is when the engine is cold it does NOT smoke. When it warms up it smokes some at idle, a bunch from a stop, and when shut off and restarted. I wondering if there is something from the AIR system removal that could contribute to this problem? The engine has great compression and runs strong otherwise. Any ideas????