Question about 1995 GMC Safari
Smoking from the tailpipe abad miss no oil on the plugs or no water in oil but has blue smoke out the tialpipe do that sound like head gaster is gone
Blue smoke is oil being burned in the cylinders. It could be valves not seating properly, valve stem seals bad, possibly a head gasket if it blew where an oil passage may let oil in cylinders, or badly worn piston rings.
If you can afford it, have a shop do a leak-down test of each cylinder to pinpoint the problem. Then you may know if you need a new head gasket, or a valve problem fixed when head is off, or new valve stem seals replaced, or if rings are bad requiring engine overhaul.
Posted on Jan 22, 2013
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Posted on Jan 02, 2017
It very hard to give an accurate diagnosis of the problem if you don't state at least the year of the vehicle because technology on cars change every couple of years, and a component that is on a vehicle this year, might not be on that model next year.
Here's a guess: if your truck is an older model, then it has a vacuum modulator on the side of the transmission. Often when these modulators go bad, the internal rubber diaphram ruptures and allows the engine to **** up transmission fluid.
Posted on Aug 07, 2008
SOURCE: white smoke when reved up
White smoke on startup could be a head gasket leak between the water jacket and the cylinder. Won't always show in the oil. Antifreeze makes it smell oily or sweet. Compression test will tell for sure. Bluish is oil that was burned. White is usually water or oil into exhaust after combustion.
Posted on Feb 06, 2010
Suspect cracked injector(s). I drove a truck with cracked injector and it billowed black smoke. Power loss can be anything from a sensor to a clogged filter. try changing the fuel filter.
Posted on Apr 06, 2010
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