This is a new valve installed as a replacement for exactly the same model which had failed. Everything else remains the same. Has a thermostat failed as well and thus no call for hot water to rads?
Check the pump is working . or its air in the pump check you have power to room stat
SOURCE: 04 civic heater blows cold air at idle
you should have hot water on all rad. hoses when the motor is running at a norm. temp. the water is not going through the heater core like it should. you have cutoff valve bad low water are a stopped heater.try a hoter thermostat if none of the above are true.
SOURCE: 3 liter mazda mpv overheating
You probably never cleaned the cooling system out.
If you have not get it done by pros.
It seems something is blocking the flow. If the water pump went bad you will know. Rarely ever heard a impeller breaks off like you think. The bearings and the seal break first.
Check and see also if the heater valve is working.
As for the over heating even new thermostats fail. Reverse flush is needed or the procan measure the pressure in the radiator cooling system and edetermine if there is a engine pressure problem. Tools and experience is the key in the game of diagnosis.
wfg8.com
SOURCE: Low Heat on 1999 Mercury Cougar
I had the same problem with my 199 cougar 2.0 4 cyl.
The problem was air in the cooling system.
I had to bleed the air out of the system, and now the heat
works much better.
I put a flushing tee between the back of the thermostat and
the heater core, and made sure that water flowed out of there.
Then I disconnected the small hose from the top of the coolant
resevoir, and poured water into it using a funnel until the coolant
level started to rise in the coolant resevoir. Then started the car, left the radiator cap off, and let it come up to temperature (thermostat open)
then over a period of about 5 minutes, periodically "goosed" the engine to clear any remaining air bubbles.
The heat is MUCH better now.
SOURCE: i have a 1998 ford f-150 and no heat. i have
You just might have an air lock. Try bleeding the system from the heater hose at the firewall. Losen one hose a little, and at operating temp. open slightly to let air out. You will lose some coolant, but just refill the rad. Now, both hoses should get hot.
SOURCE: BOTTOM RAD HOSE COLD TOP HOT. ENGINE TEMP ABOUT
Did you burp the air out of the system after changing those parts? It sounds like the thermostat isn't opening which is why the lower hose is still cold. Click my screenname, go to my tips and tricks, and choose the one about burping the cooling system - it may help you out.
64 views
Usually answered in minutes!
×