Mazda Repair Questions? Ask Mechanics for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.In most cases if the smoke clears up after running the engine then that usually means the valve stem seals are still leaking or you have bad rings on the pistons. If you pull the spark plugs are you finding them to be oil fouled? Post back and we can work from there.
Okay then I would have them recheck the valve stem seals.
I would start first with pulling the spark plug after it has sat over night before you run the engine and see if you have any signs of oil on them. It the seals are leaking there should be signs of oil on at least one side of them.
The seals are the same on both valves and if there is no sign of oil on the spark plugs then your likely looking at worn piston rings which is highly likely with the amount of miles you have on the engine.
Worn oil rings will not affect compression . There are 2 set of rings on each piston that control compression and one set of oil rings. It has to be either the valve stem seals or the piston rings. From your description it sure sounds like valve stem seals.
They can still leak if you have excessive play with the valve guides.
The only way to test the valve stems and guides would be to pull the head and have a machine shop check them. The type of smoking you getting sure dose sound like the valves. In most cases if the rings where bad it would smoke all the time.
It would be pretty hard to do but yes, its always a possibility.
Yea, I would be asking them why its still smoking just as bad as it was when they told you the seals where the cause . If they actually replaced them it should have stopped smoking it the valve guides are okay.
The PCV may bit its not likely, if it was stuck you would see smoke all the time. The EGR would have no role in it at all.
No, not in most cases. Bad guides will actually cause the engine to run poorly as well.
I do not think its a problem with the oil rings and sea foam would not work if it was. Are you 100% sure they replaced the valve steams?
If the head was loose you would loose compression. The head dose not need to be removed to replace the seals.