Question about 1988 Toyota MR2

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Car over heats within 30 min. after starting - 1988 Toyota MR2

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Thermostat is bad or the head gasket is blown, Test on cold engine, first remove radiator cap, start engine and observe coolant in radiator, you should not see any air bubbles being produced by the engine as it warms up, some coolant may slosh out so locate a drain pan under car to catch any overflow, keep pets away from coolant!
If air bubbles are present the head gasket is suspect, further testing with a cooling sytem pressure checker is required to confirm the diagnosis. I had a 22RE in a 94 Toyota Pickup that had a warped block causing a blown head gasket. Not a cheap repair if it is.

Bad thermostats do not let the coolant into the radiator hence the engine will be hot but the radiator will feel cold when running.

Be careful with radiator caps, never remove one while the engine is hot, scalding is a most unpleasant experience.

Posted on Nov 07, 2012

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