Question about 1986 Chevrolet Caprice
If it is White smoke this is a symptom of coolant entering the combustion chamber. This is extremely serious and you must stop driving the vehicle and have this repaired. Other symptoms of this are loss of coolant with no apparent leak, overfull oil, white foamy substance on the underside of the oil fill cap. it more than likely a blown head gasket, cracked head or both.
If it is Black smoke then this is a symptom of and overly rich fuel/air mixture.
If it is Blue smoke then your engine is burning oil at startup. Normally this is a symptom of valve seals that need replacing. This can be done without removing the heads, but unless it is bothering you or burning lots of oil, I would just leave it alone.
Posted on Sep 14, 2010
You need to change the valve seals as they are letting oil seep through & lay on top of the pistons so it will smoke on start up until all excess oil is burnt off the pistons. Hope this helps!
Posted on Sep 14, 2010
If it's a short duration smoking (1minute or so) it's most likely valve stem seals. They are a problem in GM's. It's not a serious problem but a real pain in the *** to fix. You need a valve spring compressor and you will need to reset and adjust the valves when you are done.Plan on a half a day to get it done.
If you are going to do it then get the umbrella type replacement seals. They last longer and I think they work better. What you have on there now is like a rubber O ring. Hope this helps.
Posted on Sep 15, 2010
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Posted on Jan 02, 2017
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