Question about 2008 Toyota Sienna

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No heat on 2008 sienna, replace t-stat. one rad hose and one heater hose hot. other rad hose & heater hose cool

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Hello, check and see if it has a valve in the heater core hoses, also take heater core hoses off from motor, their should be two, put water hose on the end of hose run water through one hose, then swap to other hose, run water throuhg it also, you are flushing heater core out see if any trash comes out either hose, check water pump, and thermostat, make sure it is opening, you can buy a bad thermostat, i have before

Posted on Feb 01, 2010

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If your top rad. hose is cool and the engine is smoking hot, it probably is a blown head gasket. What does you temp gauge read ?

Posted on Feb 01, 2010

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My 2008 Durango is over heating since they replaced the front heater core


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Remove and raise upper hose at thermostat end and remove lower rad hose.
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Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose.
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Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.

Stop leak can plug everything.

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sounds more like a possible heater core issue the heater core is what heats your car by the fan blowing over it and through tour vents ! find the 2 hoses that come out of your firewall on the back side of the engine compartment . run vehicle for 10 to 15 min and see if both of the hoses are hot if one is hot and one is cold heater core is plugged. if both hot have a diff problem. start hear first !!

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