NO HEAT!!!!! Help!!

[trevor510]

I have a 87 turbo supra, with a few mods. i just fixed my BHG and now i have no heat. not even heat off the engine. i dont know where to start. it used to get nice and warm inside and now its nothing but cold air. please help me. what did i miss on the rebuild??

[Supra2NR]

the thermostat could be stuck open
one of the lines could be pinched
the heater control could be broken
the heater core hose is not on right

a clogged heater core??
try checking those
i had the same problem b4
bcuz the idiot that sold me the car
did the headgasket job
and for sum reason decided to jus close the heater core
and plug the hose

[Chambers]

Also try burping the car, I changed the radiator fluid a few weeks ago and now sometimes when the car idols for long enough it will blow cold air, then when I rev it up a little and the heat comes back because the warm water runs through the heater core.

To burp the car, park the car uphill with the engine on the high side, keep it running, open the rat cap, I wouldn't try to do this while the car is warm, the pressure will spray hot rat fluid all over. Keep filling the rat with fluid until it fills, it can take a long time for the air to get out, Ive burped my car two times now and a little air is still trapped. If you don't have a hill use a floor jack, or ramps. From what I understand the higher the front of the car the easier the air will escape. Hope this helps.

[Supra2NR]

oh, and also is there any gurgling or waterfall sound on the dash when you rev the car?

if so, then you need to bleed the air out of the cooling system of your car

[SUPRASONIK]

Originally Posted by trevor510

I have a 87 turbo supra, with a few mods. i just fixed my BHG and now i have no heat. not even heat off the engine. i dont know where to start. it used to get nice and warm inside and now its nothing but cold air. please help me. what did i miss on the rebuild??

Hi Trevor,

How did you get on? as I have the same problem. I was advised to turn the A/C on once a week during cold weather to keep it active which i did, but now have no hot air coming out at all...although engine getting hot normally, no overheating, any replies greatly appreciated!

ps. whats BHG please?

[Starlight1988]

Originally Posted by SUPRASONIK

Hi Trevor,

How did you get on? as I have the same problem. I was advised to turn the A/C on once a week during cold weather to keep it active which i did, but now have no hot air coming out at all...although engine getting hot normally, no overheating, any replies greatly appreciated!

ps. whats BHG please?

BHG=Blown Head Gasket

[btwilson86]

You can also make sure that you have your vacuum lines hooked up properly to the intake manifold, as one of them controls your heater switch.

[86SupraMan]

Originally Posted by SUPRASONIK

Hi Trevor,

ps. whats BHG please?

only this single most important word to a supra owner, nothing much :P

BHG POWA!!!!

[SUPRASONIK]

Originally Posted by 86SupraMan

only this single most important word to a supra owner, nothing much :P

Ok thanks, I'll look at that tomorrow! Cheers, will let you know how I get on.

[Irish_Mechanic]

On all the other cars i've owned and serviced at my shop, i've always checked the heater hoses. There will be one in and one out. If one is firm and the other isn't while the heat is commanded on, youve got a clogged heatercore.
thats the first and most times easiest check. After that, in my chevy's i always take the control panel off and check the wiring pigtails to see which ones have shorted out (usually just behind the switch). Thats chevy, but an easy check also.
After the easy checks, you'll want to check the valves which, on my mitsubishi's have been inline with the heater hoses. you may need an volt/ohm meter and the appropriate values for a functioning valve. it could also be a physical deficiency. you can take the valves out of the car and check them too.

Let me know how you make out!