Luke warm heat at best.

[A4x4Junky]

First, this isnt a Bronco. Its my moms 87 Grand Marquis with an engine put in many Broncos. I hope you dont mind, but if it is unwanted in this section, feel free to kick me out of here

Air on the interior of the vehicle ranges from cold to luke-ish warm. I made sure the cable for the temp control is hooked up at both ends. Something I noticed, the engine itself never seems to circulate. I had the rad cap off and had the car idle for over 2 hours...no circulate...at least not one I noticed. Does this seem normal?

I pulled heater hoses off the heater core 1 at a time to see if I was getting much in the way of flow...VERY little. Is that normal? I would expect that there would be a large amount of coolant being pumped from the hoses with the engine running.

Ideas? Im rather stumped...so hoping a few here could kick some ideas. Kinda sucks for her to drive an hour to work with no heat.

Thanks,
Anthony

 

[TBS-POPS]

Check the heater control valve in line on the heater hoses. It is prob rusted shut and the shaft is broken free on the valve flap so it would seem that it is working... try that first.

Was the water hot in the radiator when it ran for two hours??? If not, check for a stuck thermostat...

 

[A4x4Junky]

Check the heater control valve in line on the heater hoses. It is prob rusted shut and the shaft is broken free on the valve flap so it would seem that it is working... try that first.

Was the water hot in the radiator when it ran for two hours??? If not, check for a stuck thermostat...

I bypassed the heater control valve just in case. No difference.

The water was ... hotish? I guess. It was uncomfortably warm to hold the heater hose, but I honestly figured it should be hotter. Even then, the water was a LOT hotter than the chilly air blowing out of the vents.

One of the biggest things that has me confused is the seemingly insignificant flow of water to the heater core. What would you expect to see if you started the car with the heater hose off? I would image it would be a large volume of fluid, but that is not what I found.

Thanks for the ideas

Anthony

 

[casadejohnson]

Is it real cold where you are? I have an 86 Grand Marquis and it did the same thing when it got cold. If thats the case, change the thermostat. In my case it was stuck open and it would never heat the coolant up enough to warm up the air.

 

[A4x4Junky]

Certainly not as cold as other places, but the high this week is running around 30 degrees.

I now have it down and pulled the water pump as well. Ill put new pump, thermostat, and fluids back into it and see if there is any change.

Thanks,
Anthony