I have the pushing fan hooked up. and the hoses seem to be connected. The heat exchangers are getting warm but not hot. I am compleatly lost. Everything seems to work but still no heat.

The flapers on the front of the heat exchangers seem to move properly too.

How long are you running the engine trying to get it hot? The heat exchangers will burn the chit out of ya. Are the hoses hooked from the flappers to the tube at the rear of the firewall? Red heater knob pulled all the way back?

I would expect your heat exchangers to get HOT.

The hot air has to get from the exchangers to the cabin. Are there any blockages between the engine compartment and the cabin? I used the shop vac on the blowing side and forced air into the cabin through the engine compartment tubes. In my case I found that the tube had been blocked by duct tape.

Probably a dumb question, but are you sure your vent controls on your dashboard are set correctly?

You won't get much heat if the front flappers are closed or if you're running the front fresh air fan.



PS: Also, make sure your heater tubes inside the logs aren't blocked. You'd be surprised about the amount of crap i have vacuumed out of those in the past. Anything from mouse nests to dead rats to dog food to shop rags.

Is your fan actually working? I hooked mine up the other day but didn''t get any heat either. My fan isn't turning on when I pull the lever. I haven't even started to figure out why. If your fan is pushing air like it should? you will have heat

The fan is not necssary to have heat. It only really helps in traffic/ at idle.

Jrust, some relay boards require a jumper to make the fan work. I've got a picture and I'll try and find it.

The car came off the road and sat for about 10-15 min. We put it on the lift and then let it run for another 10-15 minutes. The heat exchangers could still be touched but they got warm, not hot. The pushing fan is blowing and the flappers were moving. the front fans were also blowing and we tried the heat selector in every possible selection.

The passanger heat exchanger has the pushing tube hooked up and the driver side doesn't. Be event blocking off the other side of the pushing blower it didn't blow any heat into the car.

Hook up the hose on the drivers side. All three dash levers to the left.

What do you mean by "the flappers are moving"?

Be event blocking off the other side of the pushing blower it didn't blow any heat into the car.

Please explain this stament.

The front fan only blows cold air into the cabin from the cowl. The top slider should be all the way to the left which will turn the front fan off and close the intake from the cowl.

That was my point above. The front fan is COLD AIR only. If it is running, it will push in cold air from the cowl area, negating any heat coming from the exchangers.

That seems damn impossible. My heats get as hot as my exhaust. Ask me how I know . Dosnt seem possible for your car to run for ten min and then still be able to grab the exchanger. Somthing dosnt sound right there

I also say that after 10 minutes of running you had better NOT be able to touch the heat exchangers.
Watch the video of a cam break-in run for only 15 minutes at 2500 RPM.

The Exhaust was GLOWING red.

Stu

Well maybe we are retarded(me, my brother, and my dad).

My dad is buying the car from a guy I work with and the final deciding factor was to make sure the heat worked. Apparntely we didn't try every option becaus the current owner says the heat works just fine.

Like I said everything seemed to work, beside heat coming out.

I agree something is very wrong here. Those heat exchangers get damn hot! Are you sure you are checking the heat exchangers? They are the things wrapped around the exhaust pipes. I can't imagine them staying that cool unless maybe the exhaust pipes aren't connected!

That does it!

O.K. Here is a pic of the car warming up. Still no heat

OK, exactly my point. If you crawl under there and put your hand on the heat exchangers, you will find that they are hot to the touch!

I was following this thread on heating -when I pull up my interior cabin red lever, I definitely get heat in the car - but the fan does not appear to be spinning. With the car off I can put my fingers in the fan housing and spin it; so it does not appear to be seized - but how exactly does the fan get energized by pulling up the lever - is there a switch somewher that sends 12V the fan? Any advice appreciated.

Reg

The lever is the switch. Take it off and see if the wire is attached. Be careful as the connector is *very* close to the body panels and it's not insulated.

IIRC it grounds & completes the circuit.

Correct, it does ground. However I had to do some cleanup on mine to get the ground working. IIRC the plating on the lever inhibited it. Been many years, but with a volt/ohm meter in hand I was able to get it sorted out.

Thanks! I will check it out.