I'm COLD. NEED HEAT. GOING MAD

[Figuarus]

The basic air box does not have a controllable flap to direct air. The only heat on/off is a flap in the plenum that closes and doesn't allow heat to be directed into the cab. The true heat on/off option heaters had a valve inline with the 5/8ths hose and had a cable that opened and closed it.

I'm going to swap out the core later today, and if it's not a significant improvement, I will end up modifying the box to allow air to be pulled in from around the passenger side exhaust manifold.

All that waste heat has to be good for SOMETHING, right?
KJSR, I will call you up sometime this next week, or next weekend.

thanks for the offer!

[CRGRS 66]

Originally Posted by trevota

also if your truck over heats when it shouldnt ( like with a 195 t stat in 20 deg weather), then i would check for a possible water pump problem, or i have seen bad head gaskets/ cracked heads cause no cab heat and over heating. The cooling system pressurizes and that can restrict flow. That usually also has other sytpoms like leaks etc

My 65 with basic heater is rarely off of first or second fan speed cause the cab is so hot

water pump may be an issue that would prudent to diagnose, as you state with the 195 tstat you are running hotter than you are comfortable running, and yet you are not getting enough heat in the cab

Originally Posted by Figuarus

The basic air box does not have a controllable flap to direct air. The only heat on/off is a flap in the plenum that closes and doesn't allow heat to be directed into the cab. The true heat on/off option heaters had a valve inline with the 5/8ths hose and had a cable that opened and closed it.

I'm going to swap out the core later today, and if it's not a significant improvement, I will end up modifying the box to allow air to be pulled in from around the passenger side exhaust manifold.

All that waste heat has to be good for SOMETHING, right?
KJSR, I will call you up sometime this next week, or next weekend.

thanks for the offer!

IMHO that trying to capture heat from the exhaust manifold would A) not be practical
, B) may capture more cold air in the process anyway, and most importantly C) if the problem is the water pump, or some other cooling system component, modifying the heater box would be redundant.

Let us know what the result is of changing the heater core.

[americanmusc1e]

I got a radiator core from autozone a couple of years ago (2008??) and it was a copper core.. Not sure if they still have them or not. also mine was with A/C.


My project has the heater off of the firewall (there is a giant hole there now) and electric radiator fans. Driving it around so far I have to crack the windows in 40* weather when i have the fans on because there is so much warm air coming off of the radiator through the firewall

[Old Truck Man]

My opinion from Experience is. The heater on a 63 thru 66 truck was marginal when new. The cold air enters the cowl vent at the windshield and is drawn through the heater core before entering the cab. You cant warm up that much cold air at speed when its below freezing. My dad bought a new 64 truck and the cold weather (Indiana) we froze. My temporary remedy is to cover the cowl vents with duct tape. Then open the fresh air vent inside the cab so it will recirculate warm air. The permanent fix is to use a 60 thru 62 heater. and to boot you can remove all that heater box from under the hood. My wifes dad bought a new 66 3/4 ton. He lived in Rockford Ill at the time. The poor preforming heater saved that truck (we still have it). Because he would not drive it in the winter thus it didn't rust out from the road salt.

[awbrown]

All you need to do is find an economy heater , the one with 2 controls if you want a recirculating heater .. mine is the deluxe and it draws air at the cowl and it has plenty of heat ...

[edub981]

Check out ecklers.com they have a great sale on a heater core til 5th of Jan. I ordered one for 10 bucks. It is alum but can't beat under 20 bucks shipped.

[Figuarus]

crgrs, you're absolutely right. I really should get the pump checked. It's at least 11 years old, and the truck did sit for a long while. I'll have to get a pump installed in the next few weeks.

I've been sick, and still haven't gotten the heater core installed, but I will hopefully do that in the next few days. (head colds suck...)

[Micmac]

Hope you get to feeling better, bad flu out this way , no Zombie sitings yet! 8 people dead from the flu in NC.

[Figuarus]

Originally Posted by Micmac

8 people dead from the flu in NC.

Wow, that sucks. Lets pray it's not Captain Tripps...

[vince1]

My truck was a home to gophers for many years. They had completely taken all the seat material apart and packed it into the heater ducting all the way into the heater box and fan. I cleaned it all up and put in new ducting. Can't say the heat is that good though. Certainly not quite as good as in other vehicles I've had of the same vintage but still tolerable. Also the heat control levers were off or broken so had to get those working. Do your levers work and is it blowing lots of air where it is asked for?

[Figuarus]

vince,

I pulled the airbox apart, cleaned it, cleaned the core, replaced the blower motor, cleaned the plenum box, and made sure the two flaps both work. I can select between windshield defrost, and floor. The hot/cold flap works. The only issue here is not enough heat coming from the airbox. Don't get me wrong, It's relatively warm, just not warm enough. I get 50 degree air when the temp outside is about 40.

I have to run the truck for about 15 minutes to get the coolant warm, and then turn on the fan to get any effect out of the windshield defroster.

[Bare64]

Like jtrichard said "some pics of how your hoses are ran" from the water pump to the heater box under the hood and back would be good. I had this issue when I was 15 years old with heat in an old Nova, I had put the TStat in upside down causing it to run hot along with no heat. My Dad laughed his ass off at me for a week or so.

[jtrichard]

i asked for pics because i have seen them hooked up totally wrong and NO hot water was going through the core

[Bare64]

Originally Posted by jtrichard

i asked for pics because i have seen them hooked up totally wrong and NO hot water was going through the core

Understand, guilty of that one too in my youth.

[CRGRS 66]

I noticed a good question that I don't believe was asked previously...

Vince1 asked if the blower was blowing air where it is asked for. Are you getting strong air flow from the fan?

Still think you need to look at the water pump, but just wanted to clarify that the fan is blowing ample air.

[Figuarus]

Yes, the blower works very well. I tried posting photos, but i cant seem to get them to upload.

[Figuarus]

Lets see if this works. Posting fro my phone.

[Micmac]

Well, I went to post the ones you sent and lo & behold! I'm digging the skull on the air cleaner! The hoses look right to me, but it's 0305 here and 9 degrees, and I ain't going outside to check! My memory ain't what it once was. I think it happened in '69, or it could've been '72?

[Figuarus]

Originally Posted by Micmac

Well, I went to post the ones you sent and lo & behold! I'm digging the skull on the air cleaner! The hoses look right to me, but it's 0305 here and 9 degrees, and I ain't going outside to check! My memory ain't what it once was. I think it happened in '69, or it could've been '72?

Yeah, i tried posting them again after I sent them to you, and lo an behold, I was able to do them from my phone this time.

That skull was painted about 15 years ago, when I was 15, and was originally done for my dad's Monte carlo. His carb and transmission found their way into my truck, so I figured it to be only proper to clean it up and put it on my truck.

Here's a better view of it.

[Coltronist]

I had the same problem with my other c10. Once I lit the truck on fire the heat problem went away but I started to have other problems. Fortunately however, my thermostat seems to be working perfectly!!

[Figuarus]

Originally Posted by Coltronist

I had the same problem with my other c10. Once I lit the truck on fire the heat problem went away but I started to have other problems. Fortunately however, my thermostat seems to be working perfectly!!

You know what they say; light a fire for a man, he'll be warm for a night. Light a man on fire, he'll be warm for the rest of his life.

[chevy_mike]

Hoses look correct. On the 3/4" hose, when the truck is at operating temp, is this hose the same temp as the upper radiator hose? They should feel the same, almost too hot to touch. If they are, does the 5/8" hose feel only slightly cooler or does it seem a lot colder? This will tell you if you are getting heat in and out of the lines.

[Figuarus]

the 3/4 definitely gets hot, and isn't QUITE as hot as the radiator hose, but it's pretty damn hot. (I have a metal flex hose on the upper line @ the radiator.)

[Figuarus]

Ok, i pulled the core, inspected it, cleaned it out and re-installed it. Same issue.

Someone mentioned water pump, but i got to thinking that if the water pump was bad, I would be overheating, but have no flow to the core.

I'm leaning towards a restriction, but I don't think it's in the core. I'm wondering if there is something at the pump itself, or in the manifold.

[Bare64]

Originally Posted by Figuarus

Ok, i pulled the core, inspected it, cleaned it out and re-installed it. Same issue.

Someone mentioned water pump, but i got to thinking that if the water pump was bad, I would be overheating, but have no flow to the core.

I'm leaning towards a restriction, but I don't think it's in the core. I'm wondering if there is something at the pump itself, or in the manifold.

Make sure you TStat was not installed ass-backwards.......big restriction