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Cadillac 1990 seville is not heating up. Runs, but no heat coming into the car. Has plenty of antifreeze ... also makes quiet buzzing sound intermitently somewhere in instrument panel...help?
A/C no longer works, disconnected, they wanted $1200 to fix it last summer, any relationship with heater?
antilock brake light will not go off.
Thanks for your opinion
Re: Cadillac 1990 seville is not heating up. Runs, but no...
Remove glove box. Look under it for the ac programmer. Check the air mix rod for free travel.Turn temperature up and down to see if it moves correctly.
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Theoretically yes. Antifreeze has a higher heat capacity than water. Basically, a liter of antifreeze can hold more heat than a liter of water. I dont think it would be enough to cause an overheat though
could be if vehicle has never had antifreeze ,if antifreeze has been used since new then this isnt the problem ,most likely is head gasket but the water pump impeller is a big suspect as well as they ahve a plastic impeller on a metal shaft and they can come loose .
Pull the dist. cap of and inspect rotor and contacts. If the rotor has a lot of graphite dust in the center this may cause the coil to fire at more than one cylinder and cause the module to over heat for just a moment. Just fixed a gm truck that was doing this. Cap and rotor.
A clog can cause low heater perforance in the winter. I had a 1990 Cadillac Deville that had cold air blowing in the middle of winter, and had the system flushed and that solved the problem.
One can feel the two heater tubes at the firewall leading to the heater core to verify whether or not the antifreeze/coolant is getting hot at the heater core.
If you had heat before, and not now, it sounds like you have air in the system. When the system is cold, open the radiator cap and check the level in the radiator. If it is low, fill it back up. Also, make sure you put the "tabs" in the radiator if you changed the coolant. There should be a decal that says the warranty would be void if you don't put them in. They are cheap at the dealer. Before you start it back up when it is cold, take the cap off and squeeze both hoses several times. you should see air come up and out the inlet.
It may help to jack the car up on the Pass side with the cap off let it run. putting a little 50/50 coolant in as it runs. Leave the heat on at high while you are doing this.
around 220 is about the high end of normal operating temperature,watch it carefully and if it gets ANY hotter than that then drive it right away to a highway or get it up to at least 40 mph and it will cool down to approx.150 degrees,Make sure there is enough antifreeze in it first.Also listen for the cooling fan to come on when it gets to 200-210 degrees,you may need a new cooling fan motor which is about $60.00 plus labor
sounds like somthing is loose. are the wheels out of balance? the rotors are on corectly or the caliper would not go back on. what im woried about is something not tight enogh . did u bleed the breaks?
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