Question about 2001 Daewoo Leganza

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My engine runs hot

I replaced several hoses and it isn't leaking anymore and it still runs hot

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  • Tommy Walker May 11, 2010

    Is the fan running while the engine overheats?

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Replace the thermostat . Check your coolant level. Do not run the car hot. More damage such as warped heads and head gasket damage will occur.The intake manifold gaskets can also blow. Bleed the system when refilling with antifreeze/coolant. if the fans are not turning replace the temperature control sensor located at the top of the enging near the thermostat housing.

Posted on Feb 13, 2009

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1 Answer

Bad coolant w/ leaks from many places, overheated and shut off, heater doesnt blow heat anymore


After the engine has reached normal operating temperature, feel both heater hoses going into the firewall. Are both hot? If both are hot, it's probably the door or doors in the heater case not operating from the selector knob on the dash. If only one hose is hot, the coolant is not circulating through the heater core. Look for a water valve in the hoses that is shut. If no valve, crack open the cold line to see if you can start circulation through the core. If neither hose is hot, pull off the inlet to the heater core (it may come from the cylinder head area) and run the engine and check stream flow. It won't spurt out like a garden hose, it should flow out in a smooth even stream, maybe just enough pressure to push a steady stream. If no flow comes out, coolant is low, or there is a circulation problem in the engine, like a kinked hose, a weak water pump...
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1 Answer

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First, I am assuming that your vehicle is equipped with the 3.1L V-6 and NOT the 3.8L V-6? (Engine size is really nice to know in situations like this!)

It could be any where in the cooling system. The intake gaskets also like to leak externally. A bad intake gasket does not always mix antifreeze with the oil. Take a flashlight and look for coolant on top and/or down each side of the transmission bell housing. This is VERY common on these engines. It may be leaking just enough to where the exhaust crossover pipe is burning it up (and stinking) before it has a chance to run on the ground. Also look for stains on the intake manifold-to block mating surfaces and on the side of the bell housing that will indicate a leak. if your vehicle is still using Dex-Cool, the stains will be pink. If your coolant has been changed to green antifreeze, the stains will usually be real white or dark green depending on the brand and the severity of the leak.

If there are no leaks or stains in this area, then look around the water pump area for the same things. The radiator or coolant hoses (including heater hoses) could also be leaking. If it is stinking when the engine is hot, then you could get it hot then shut if off and look for steam.

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Sounds like you have an air;lock in your cooling system.Try placing a bleeder on the return hose to the heater core ........looks like a small tap

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