So did you check the gauge and the sending unit ?
Either component could be faulty.
1998 Chevy Cavalier running hot - Car Talk
community.cartalk.com/discussion/.../1998-chevy-cavalier-running-hot
Sep 8, 2012 - Hi Everyone i have a 1998 chevy cavalier, 4 door, 2.2 liter SOHC, ...been running hot for a while now. readings are off the dash guage, ... It reaches what has become it's usual operating temperature, at "RM" within another minute or two. ...but when the car was still warm, it would not say it was overheating ...
Car Repairs: Coolant Temperature Gauge - YouTube
? 7:47
https://www.youtube.com/watch?v=fWjPX0_ibxY
Apr 15, 2012 - Uploaded by TheYoshiClan
If your coolant temperature gauge isn't working, check this out before ... for it saying that my engine is hot enough to melt tungsten carbide .... My temp gage is doing the same thing on my 1992 Chevy van g30, 350 engine. ... off and it's not my switchbut actually a faulty gauge.... its between plugs 1 and 3.
SOURCE: Running Hot
Sounds like the water pump.Check if you see coolant or coolant residue behind the water pump pulley.
SOURCE: 1998 Dodge Durango no heat when using heater.
BLEND DOOR STUCK OR BROKEN. NEEDS TO REMOVE DASH AND HEATER/EVAP CORE BOS TO REPAIR REPLACE.
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: 1995 Chrysler Cirrus overheating
Probably not water pump. Engine is notourious for vapour lock.
Cooling system must be blead of air before thermostat will work. Cool bottom rad hose is a dead give away. If you are still watching this forum reply , and I will walk you through the only way I know how to make it work properly. It's actually easy if you do it my way. I have worked on lots of cars , and this engine was the hardest to bleed out. Did one Yesterday , and works perfect.
Testimonial: "I need help on how to bleed the system thanks"
SOURCE: Heat troubles..92 dodge caravan 3.3L..new
If it is fogging your windows, you have a leaking heater core. Dash removal is required to fix it.
Testimonial: "great advice,,but I am not losing antifreeze from my cooling system,"
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