Question about 2001 Chevrolet Malibu

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Chevy Malibu 3.1 engine runs hot. (Every weekend I am under the hood replacing something new) I have replaced the thermostat, the upper and lower intake manifold gaskets, The Water Pump, and I have added coolant to the reservoir tank until it came out the bleeder screw above the water pump. I have checked the radiator fans - also ok, I cannot figure this out. The only thing I have not done is flush the system, but the coolant appeared clean when doing the above work. HELP -Gary-

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What about the radiator?

Posted on Aug 06, 2010


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That is normal, it will not get hot without the thermostat. The water cools in the radiator and falls to the bottom and the bottom hose is cold. This is what cools the engine and stops it from overheating.

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I have an 06 charger 2.7 that runs hot. I have replaced the upper rad hose, water outlet, and the 3 hoses that run under the intake back to the firewall( from the water outlet). I was about to replace the...

If the thermostat is stuck closed there will also be no flow. This is way more likely than a water pump and would first on my list when diagnosing a no flow overheating issue. I'm pretty sure the 06 charger has a 3.5, 5.7, or a 6.1 liter as an option. Are you sure you have a 2.7? On the six cylinder the thermostat is located behind the housing bolted to the block that the lower hose is connected to.

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When it is "overheating" feel the upper and lower hoses. If one hose is hot and one is a lot cooler than you have no flow through the radiator. Most likely cause for this is the thermostat.

The thermostat is located behind the housing that bolts to the drivers side of the intake manifold that the upper hose is attached to. It is not the easiest job in the world to replace but it can be done.

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