Question about 2002 Toyota 4Runner

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How do you bleed coolant system on a 2002 4runner v6 after changing thermostat? system is air locked and thermostat will not open.

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There are very few cars these days that need bleeding or even have a bleeder. And most of those are rear or mid engine vehicles. Gravity will fill most of the system, then when you get the engine hot, the thermostat must open, because it is lower than the reservoir. The rest of the air will then bleed out and be replaced by water when it cools.
If the thermostat is not opening, it is probably because it is defective or put in backwards. You have to put the heat pellet towards the engine.

Posted on Aug 13, 2012

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Also drive front end up on ramps that will give you the highest point for you air to escape

Posted on Jul 31, 2009

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Once you are done removing the old coolant refill the system along with the overflow tank. Start the engine with the cap off and continue filling while the engine warms up and the thermostat opens this should remove bleed out most of the air. Once the thermostat is open rev the engine a bit and this should remove any remaining air.

Posted on Jul 20, 2009

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Posted on Jan 02, 2017

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