Question about 2000 Toyota Sienna

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Oil seeping out from the cylinder head.

I have recently purchased a 2000 sienna minivan, engine was clean when i took it but after a few days of use, oil seems to be mildly seeping out from the cylinder head gasket, what are my options?

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Where did you purchase the vehicle from?

Posted on Dec 14, 2008


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oil in spark plugs indicates that the cylinder head gasket is leaking and allowing oil to seep into the cylinders. if engine is running you will also have blue black smoke from the exhaust.
alteratively the piston rings are so worn that too much oil is passing them and spraying up on the spark plugs but that is not normal on all cylenders at the same time maybe only the one. also there would be a very low compression when checked with a compression guage.

second check is to remove the oil filler cap and see if it has a white emulsion on it this also indicates that the coolent water antifreeze is mixing with the oil at the cylinder and causing this.

the fix is to have the cylinder head removed and the gasket replaced, to ensure the head is not warped and skimming on a lathe is also a good idea.

if this is the original engine then at 16 years old it maybe time to replace for a recoditioned engine or a new one if the rest of the car is in good order.

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My sienna smokes from the exhaust. what is the likely problem and remedy?

If the smoke is white it would indicate water/coolant getting into the combustion chambers from the cooling system. (Usually caused by allowing engine to become excessively overheated when cooling system has run dry). If this leak is bad enough you may also see a water and oil emulsion on the oil dipstick due to water runing into sump.
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Never go to a dealer. Calling or Visiting is okey

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