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If your 1998 Cadillac Deville overheats and you've changed your radiator and thermostat a week ago what's the problem. The radiator cap has been changed but the coolant level's low too soon.?
Wiki User
∙ 15y ago
This is not an easyone to diagnose without seeing it. It could be many things. Heres a few ideas. Coolant is going somewhere if it is full. After you replaced the radiator and thermostat you need to run it and then more coolant usually needs to be added. After you have done that and ruled that out the only other ways you can loose coolant are bad head or intake manifold gaskets,leaking waterpump,cracked block,leaking hose. Get a pressure tester hook it up to your coolant system apply 15-20 lbs pressure and see what happens. if the pressure drops you have a leake somewhere. if you cant find the leak . look at you oil to see if it is going there. If not there start your car and smell the exhaust to see if it has a sweet smell or if steam is coming out. If coolant is getting into the engine combustion area it will leave as steam. One last thing be sure the electric cooling fans near the radiator are coming on. If they are not working you will over heat also. I believe thes engines have a sensor that causes the engine to shut down if they overheat to save the motor from damage.
Wiki User
∙ 15y ago
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