NOT ALL THE TIME,...nut most of the time when I start my 87 GN it will blow out a puff of blue smoke I REALLY dont think it can be vaulve guides they are pretty new,...is this normal? should I be worried about it? does it have anything to do with the turbo and its oil system?
It is possible tha the induction is receiving oil from the turbo due to a leak in the sheft seal and puddeling in your intake.When you first start the engine, it pulls the oil into the engine and causes it to smoke. This could be a possibility but i would first make certain that it was not the valve guide seals.