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.
If the smoke is blue/grey it would indicate eccessive oil being burnt in the cylinders due to worn, broken or stuck piston rings. This problem shows up as having to constantly top up oil level every day or two. If the smoke only happens when engine is first started then it means worn valve guides or valve stem seals.
The first problem (white smoke) will requre the removal of the engine head to replace gasket and have head face machined,
The second problrm (blue/grey smoke) will require further diagnosis by a mechanic to locate the true cause and may mean a total engine overhaul.
Dec 11, 2010 |
2001 Toyota Sienna