Replaced the rad. core, water pump, head gaskets, TCS, heater core and thermostat in 7/08 and the car was running great until a couple of days ago when i lost heat in the vehicle and then it started to overheat. no visible leaks but when i make sharp turns i can hear boiling liquid. I pulled the thermostat to avoid overheating but to no avail....where am i going wrong?
What engine do you have? One noted problem with the 4 cylinder engines is the reliability that at some point the intake will crack. I went through all the same things when I bought my 93. Drove off the lot, started overheating, replaced the thermostat and still had the problem without moving from the driveway. Look all around the intake. Make sure car is full of coolant and have the engine running. Most likely you will see a small coolant leak on the backside by the firewall. These cars were known for this problem. By the way if this is the problem make sure you take it to a reputable mechanic, make sure you get a new one installed. I had a used one and had the car back in the shop the next day. It then sat there for 2 more weeks while the used car dealer and I had a "discussion".
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if the rad cooling fans stop working as well as the following. thermostat stuck closed, bad water pump, plugged radiator(no flow), cracked head gasket, plugged heater core in some cases, collapsed coolant hose.
Hi, This is a sign that you have combustion gas entering the cooling system, have a cylinder leakage test done to find this out. If this is the case you will need a head gasket replacement or cylinder head replacement.
You've go so far but you havn't mentioned the water pump ! It's possibly 17 years old and due a rest. It's called a pump but it's mearly circulates the water provided the thermostat is open. It'll be a cheap fix compared to lifting the cyl head and head gasket replacement! You seem to have had some advice , replacing the difficult stuff (possibly from the supplier of a rad and heater matrix core??? ) If the car is running there is heat somewhere ! check the temprature of the Rad hoses , the will be hot (caution) after a few minutes of running. then check the two smaller hoses going thru the bulkhead (into heater matrix) and both sould be equally hot under normal conditions. If not .... pump replacement is a worthy option.
Have the cooling system pressure tested. If it holds pressure, that's a good thing. If it doesn't hold pressure, you may have a leaking head gasket. What may be happening is the crack in the head gasket could be blowing hot air into the cooling system causing it to overheat.