My '75 does not put out much heat from the heater.  It seems that the cars from the 50's and 60's could roast you out of the car with the heat on full blast -- mine does not.

|UPDATED|4/13/2018 2:33:21 PM (AZT)|/UPDATED|


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Did you visually verify that the heater valve is open internally? Is it a problem that the air coming out is not hot enough or the air is hot but there's not enough quantity? I drove mine to work daily and in the winter time the heater put out plenty of hot air.

|UPDATED|4/13/2018 3:55:31 PM (AZT)|/UPDATED|


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1973 L-82 4 spd

Yes, the heater valve that I put in is a ball type made for a heater hose.

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Try checking the temperature of the hose going in and the hose going out and see if there's any big difference. You can get one of those inexpensive laser temperature guns at Harbor Freight if you don't have one. I assume that the hoses are free and clear.

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1973 L-82 4 spd

I bought a laser temp gun:  The temperature difference between the inlet and outlet heater hoses is about 10 degrees with the heater fan on high.

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That is certainly hot enough to heat the cabin.

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As one that installed factory A/C in mine, I'll say it's medium difficulty.  IIRC, you have to do it from the inside.

What was the temp. of inlet hose? 

If 130* air is heating the interior, then maybe you're not getting enuf air flow.

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1973 L-82 4 spd

I wonder if when they removed the A/C (assuming they did go inside it -- it looks like the fittings are still jutting out of the housing) they did something to disrupt the airflow in the heater box.

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If the evaporator is still in the housing, then perhaps it's clogged w/ debris, mold, and/or mildew.  You can open the housing up w/o removing the engine and check the evaporator.  Not sure why they would've disabled the A/C.  

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1973 L-82 4 spd

As long as you don't have a run hot problem you might want to change to a 195 degree t-stat. 165 is on the cool side.  

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DanT

just a thought, as i did not notice anyone mentioning this, and sorry if i missed it if they did mention the blend door.  Its a door within the duct that diverts the air from either the a/c evaporator and/or the heater core.... so it doesn't blow hot air when the a/c is on, or cold air with the heater on....  if you took the map pouch panel off, you'd see the lever on top of the duct.   I have had issue with the wire going to it come off, or not work at all when you roll the heater selector....   i'll link a video showing how to replace the heater core, and you can see the small lever with the wire(push/pull type wire) that opens/closes the blend door... it can be seen around the 3 minute mark...   http://https://www.youtube.com/watch?v=83s8HnUPcIU 

|UPDATED|4/24/2018 5:24:28 PM (AZT)|/UPDATED|


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StingrayJim
NCM Lifetime Member #1936

Stingray's '76���������������������������� StingrayJr's '78���������������������������Lil Red '94

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Thanks!  I'll check that soon as I can.



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Okay, I pulled the right-side dash and found the lever.  The cable is hooked to it, and it did move when I moved the heater controls, but after a bit it no longer moved.  Don't know why.

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