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Toyota SBV Overheating - Corolla Toyota Cars & Trucks

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If there is no oil in water or water in oil, try having your radiator and cooling professionally cleaned at a radiator shop and tell them to install a new TOYOTA thermostat. Sometimes aftermarket thermostats do not work properly in Japanese cars.

Worst case, if the oil has a milky substance in it or the water has an oily scum on top of the coolant, you probably have a blown head gasket which frequently occurs when an engine overheats. A good radiator shop should be able to test it for both. That could be a major expense. Trade it quick or repair it and plan on keeping it for a long time.

The coolant should be at least a 50/50 mix of anti-freeze and water. 100% water will not work and 100% coolant will not work. Most auto parts stores stock the pre-mixed 50/50. Even though some coolants are advertised as PERMANENT, I've never trusted them. Most mechanics will recomend a change ever 3-5 years depending on how the vehicle is driven. Short trips are sometimes more of a problem than longer trips because the vehicle does not stay at operating temperture long enough to benefit from the HOT circulation of coolant.

If you do it yourself, be careful to get all of the air out of the motor block. Some are more difficult than others to do. The old way was to fill it up leave teh radiator cap off until you see evidence of circulation and you know the thermostat has opened. You may have some of it overflow but that could be caused by an expanding air bubble and not too much coolant. Again watch for the circulation. Watch any leaking leaking/excess anti-freeze, it has a sweet taste to animals and will destroy their kidneys.

Posted on Oct 15, 2008


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Posted on Jan 02, 2017


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