I HAVE A 2000 MONTERO SPORT LIM 3.5 AT IDLE I HAVE NO HEAT IT’S COOL BUT @ 1500 PLUS RPM I HAVE IT 100%…I CHANGED THE THURMO AND THE WATER PUMP STILL HAVE THE PROBLEM!!! ANY ANSWERS???
Please turn your caps lock off.
My guess is that the heater core is coated inside with residue.
But…is the engine itself cooling down at idle? If so your new thermostat may be stuck open.
First you have to figure out if your heater core is plugged or if you have a problem with your blend door. Feel the two hoses going into the firewall (from engine compartment) to your heater core. If they are both hot, about the same temp, then your heater core is probably fine, and you have a blend door not working properly. This involves spending time on your back in the most uncomfortable position you can imagine figuring out where your blend door is and fixing or repairing a door actuator or HVAC control head. Good luck.
Thanx for the help sorry about the caps…@ idle the temp it normal
Another thing that would do this is air trapped in the cooling system, though if it was also there before the recent work then there is some other issue that would allow the air in.
yea the prob was there before and still there after
thanz foe the advice
Your repair manual, Haynes, Chilton’s, etc., will show how to bleed the air from the cooling system. On some vehicles, it helps to run the front wheel upon ramps to raise the radiator tank higher than the engine block; thus, easier to bleed.