There is blue smoke coming from my car exhaust only when it idle when I stand at a stop light and on a hot day there is a lot of blue smoke coming out of my exhaust when I do a reversed parking. I did replace my O rings but know this is happening.
Please tell me what can the reason be for this smoke, after all I did put on new o rings.
I would probably be more suspect of a valve type of problem in the cylinder heads, worn valve stem seals possibly. You might make sure the PCV system is working properly and can try a can of Engine Restore motor oil additive (available at any auto parts store) to see if that helps.
A valve job is probably the solution…but I would need to do some testing to be sure, that is a big job to be guessing at. Ask your mechanic to do a cylinder compression test to see if one or more of the cylinders is weak on compression. This would at least tell you if there is excessive internal wear, most likely caused from a piston ring or damage to a cylinder wall.
The Engine Restore motor oil additive should be used after each oil change. It will help slow down oil consumption, which is what is happening if you have BLUE smoke out the exhaust tailpipe.
Blue smoke is the hardest to pinpoint the source out of the 3 different colors of smoke. Since the cause of the smoke is due to internal wear, and or leaking internal oil seals that you can not see from the outside. Sometimes you just have to remove the cylinder heads and visually inspect them and the internal cylinder walls for damage.
Since this repair is so labor intensive, its very expensive so you have to weigh your options, is the vehicle worth this kind of money or cut your losses and replace the engine…or the vehicle.
Blue smoke is due to an internal oil leak and oil is getting on the spark plugs.
Black smoke is from too much un-burned fuel (engine running “rich”)
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