2004 Toyota Sienna white exhaust smoke

106,000 MILES • 6 CYL • 2WD • AUTOMATIC
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PEMA947
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  • 1 POST
Just had head job, water pump, timing belt done on the engine. When it starts there a bellow of white smoke...Mechanic says the motor is good and thinks it is somewhere in the exhaust system...catalytic converter, or clogged sytem some where ...i read that the vacuum modulator might be a cause??? Any ideas would be appreciated....also, engine can idle all day and never over heats.
Nov 21, 2008 at 4:58 PM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
i wouldnt say its an exhaust issue if its billowing out white smoke.

if your talking about on a cold morning when first started that is normal.

it could be a bad vaccum modulator on the transmission witha torn diaphragm causing transmission fluid to be sucked into the manifold and be burnt off causing white smoke.
Nov 22, 2008 at 12:05 AM
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