There are a couple of reasons why a 1996 Cadillac Seville SLS may overheat. The coolant may be low or the thermostat needs to be replaced.
could be your thermostat is stuck or perhaps and needs to be replaced.
start with checking thermostat
Check your oil and see if it's milky. If it is then it's leaking inside. Does it steam out of the tailpipe? If it does you have a bad head or head gasket. have you replaced the thermostat? if you haven't, do that first, it may be stuck closed.
You may have the thermostat in backwards. The spring side of the thermostat faces into the engine.
Head Gasket to replace
Thermostat is stuck closed.
The engine is overheating.
If it's just occasionally, it may be a sticky thermostat.
generally if an engine overheats, but then does not overheat when heater is turned on, is a good indication that the engine thermostat is stuck and needs replacing
A bad water pump or thermostat can cause an engine to overheat. A plugged (clogged) radiator or heater core may also cause an engine to overheat.
The thermostat may be installed backwards
a. blown headgasket. b. defective thermostat. c. defective radiator. d. no oil, no coolant.
Check the upper and lower radiator hoses at the engine. They have a tendency to expand and split.
A 1991 Subaru Impreza might overheat because of a leaking cooling system or because of a damaged thermostat. You might also have a damaged or leaking radiator or a cooling fan that is not working.
There are many ways that it can overheat. Coolant loss, blown head gasket, stuck thermostat, clogged radiator ar only a few. You would have to consult a mechanic to know for sure why it is overheating.
You could have a bad thermostat, just because its new doesn't mean its good, TRUST ME ON THAT, or you could possible have an air pocket in the cooling system.
I had the same probl;em on my 1996 SL1. I found the bypass tube from the head to the reservoir was clogged and would not let water return to the reservoir. When I unclogged the line the overheating went away. I also had replaced the water pump and thermostat before without any luck. The clogged line was the culprit.
In the general case, cars overheat because of a bad thermostat, low coolant level, blockage in the coolant system, insufficient antifreeze percentage, fan blockage, or water pump failure.
The thermostat could be stuck shut or the water pump could be bad. These are the two most common causes of this problem.
While there are several causes of overheating, the two most common reasons, by far, would be a damaged or worn water pump, and or a faulty thermostat(s).
mine did this too. it was my thermostat. it was such a terrible smell and whenever i used my heat in my car i smelled it too. the thermostat is a pain.
It's the current flowing in a wire that causes it to overheat.
The Thermostat and Temp and Press Valve is faulty and needs to be replaced. or the PRV (pressure reducing valve) is dirty and must be replaced
Low coolant, inoperative water pump, head gasket failure, inoperative radiator fan, etc.