Mechanics

GREY SMOKE COMES OUT AT THE EXHAUST PIPE

2000 Toyota Sienna

Engine Performance problem
2000 Toyota Sienna 6 cyl Front Wheel Drive Automatic 103000 miles

I've noticed that almost every time I take a long drive for 1.5-2 hours or around 100 miles and stop the car to rest around 15-30 minutes, when I come back to start the engine there will be some grey smoke comes out around 3-5 seconds from the exhaust pipe and disappear then. By the way, my car runs smooth and it was already tuned up at 95000 miles. Water pump and timing belt had been changed already. Moreover, two of O2 censors has been changed but the one after the CAT has not been changed yet. Is there any problem with the engine? Why the grey smoke comes out? How much do I have to pay for fixing this problem?
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BEW
June 11, 2009.




So tell me are you using oil or antifreeze? Get back to me on that.

Racefan966
Jun 11, 2009.
What do you mean about oil or antifreeze? If it's engine oil, I change regular engine oil every 3000 miles at STS or Strauss. If it's antifreeze/coolant for radiator I have never changed it yet.
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Tiny
BEW
Jun 11, 2009.
What I mean is check the oil and see if it is low. Then check the anti freeze in the radiator and see if it is low. If you have never changed antifreeze in 103,000 it more then time. Anyway let me know what you find with those fluid levels and we will go from there.

Racefan966
Jun 12, 2009.
I will check fluid level and change antifreeze as you advise. Any problem after that I will get back to you. Thank you very much.

Tiny
BEW
Jun 12, 2009.
I don't mean you have to change the antifreeze now. I am saying it is do. This may not fix anything other then it is time to be changed. Now let me know if any of the fluids are low as this may help with figuring out why it smokes ok. Thanks.

Racefan966
Jun 13, 2009.
I already checked the oil and antifreeze level. They are all fine(not low).

Tiny
BEW
Jun 13, 2009.
Well to get gray smoke you are either burining oil or antifreeze. How often do you fill the coolant res?

Racefan966
Jun 15, 2009.
For the coolant, I haven't filled it since it's never low. For the oil, I fill it about half QT. Every 3 weeks or a month because I usually have to drive a long way.

Tiny
BEW
Jun 15, 2009.
Well for piece of mind you could have a shop do a chemical test on your car to make sure there is nothing wrong internally. What a chemical test is, is a fluid in a tube that is put on the radiator where the cap goes and then is run and if the chemical changes color you have exhaust gases getting into the radiator and that means coolant is getting into the engine you could also do a coolant pressure test just to make sure there is no leak there either. How is you mileage sense this smoke started?

Racefan966
Jun 16, 2009.
The smoke comes at around 93000-95000 miles. There is one thing I don't understand, if the coolant is getting into the engine why the coolant level is not low? I just changed the coolant this Sunday and I noticed on Monday that after driving for 1 hour there is a small group of grey smoke came out few seconds when I started the engine. By the way, if I have to test and fix it how much do I have to pay for?

Tiny
BEW
Jun 16, 2009.

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