Sounds like the thermostat is in backwards.
Hi There,
Chances are the cooling systems requires "bleeding". Meaning there is a pocket of air in the hoses where your sensor is.
Dependent upon the car maker, there are specific instructions on rectifying this problem.
If your car is an vintage car (about 30 years or more), then the thermostat could be playing up (stuck), and needs replacing.
Good luck!
SOURCE: 92'Sentra GA16 suspect cooling sytem failure
you my friend have a blown headgasket, and heres why #1 you have white smoke at start up(this is an indicator of water in the fuel and hence through the exaust when it mixes in the cylinder#2 it goes away after the warm up(this generally happens because the cylinder is so much hot than the boil point of the coolant)very little smoke would be noticed#3 oil on a plug(if they were all of the plugs i would say you had bad valve seals or oil rings on pistons) seeing that it's only one pretty much tells me that is where the gasket is leaking.#4 poor idle(car will idle rough and hesitate because the computer is trying to compensate for the water air fuel mixture. hope this helps please rate this
First place I'd look is at the thermostat. However, if the hose did not rupture in a normal manner and blew apart, I'd also suspect that you may have a blown head gasket. In that case, compression is entering the cooling system which is not designed to handle such high pressures, therefore causing the hose to explode). This will also result in rough running you observed.
SOURCE: temp guage showing hot, not getting any heat for 1992 Mercury Cap
If the hoses to and from the heater core are hot , and you say the heater core is hot , then the only answer is that the air duct that flows into or out of the heater core plenum ( housing ) is not opening.
Heater control on dash borad inoperative.
Not sure about 92 capri , some cars have a cable linkage , some work on vacume motors.
Try to find a haynes manual for your car , they will walk you through almost every step of anything you may ever want to do to your car.
You seem to know what you are doing , but I gotta ask ........the heater core you felt was up behind the dash inside the passenger compartment of the car right ?
SOURCE: radiator under too much pressure?
It might of just been a defective hose because if the pressure gets to high, the radiator cap will relieve the pressure when it reaches the pressure stamped on the cap.
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