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#76 |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
Sorry for lagging guys.
I got my thermostat this weekend, but was too cold to go out and do it. I did test it on my stove, and did see it open and close. I'll (hopefully) be installing it tonight when I go to my dad's house.
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#77 |
Registered User
Join Date: Aug 2012
Location: Tooele, Utah
Posts: 327
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Re: I'm COLD. NEED HEAT. GOING MAD
Too cold?? It was like spring this weekend!
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1936 Chevrolet 1/2t 1964 Chevrolet C10 1964 Chevrolet C10 (sons) 1965 Chevrolet K10 Suburban 1969 Chevrolet C10 1937 Plymouth P4 |
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#78 |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
Yeah, but after 4 o clock, I get lazy and tired.
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#79 |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
Ok. An update.
I got the 195 thermostat in, and fixed a crack at the drain plug I didn't know I had. I ran the engine up to operating temperature, and noticed that the heater hoses eere definitely hotter, but even with the blower motor at medium speed I'm getting about 40 degrees difference between the inlet side hose temperature and what I'm getting from the vents. I went and measured the temperature with the laser thermometer and took a reading of 140 to 160 on the inlet side. The return line is measuring about 120 to 140. The heater outlet air temp is at 85 after a hard drive, and drops down to about 70 when idling for any period of time. I'm going to open up the air box today and make sure any air flow is being directed through the heater core. I noticed also that my temperature gauge is writing just over half. With the 180 thermoset, it was writing closer to one quarter. I've attached
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#80 |
Registered User
Join Date: Aug 2009
Location: Detroit MI
Posts: 1,209
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Re: I'm COLD. NEED HEAT. GOING MAD
almost seems it is pointing towards a heater core...
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#81 |
Registered User
Join Date: Feb 2014
Location: Pocahontas Arkansas
Posts: 684
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Re: I'm COLD. NEED HEAT. GOING MAD
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.
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#82 |
Registered User
Join Date: Aug 2009
Location: Detroit MI
Posts: 1,209
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Re: I'm COLD. NEED HEAT. GOING MAD
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 ...
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#83 |
Registered User
Join Date: Aug 2009
Location: Detroit MI
Posts: 1,209
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Re: I'm COLD. NEED HEAT. GOING MAD
Did you ever get rid of that temp sender in the "T" fitting ?? that wont help if it is a restriction...
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#84 |
Senior Member
![]() Join Date: Jan 2011
Location: Hayes Va
Posts: 4,569
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Re: I'm COLD. NEED HEAT. GOING MAD
My 66 with the deluxe heater and the ability to close off the outside air. With it half open the heater will run you out the truck with it 20 outside. I have a heater control valve in it hooked to a choke cable turn the heat down. The biggest thing I did that made my truck toasty was to seal all the leaks letting in cold air. Sealed three holes in the fire wall the made a huge improvement and putting new seals on the doors (the honda seals) and the windows.
Jimmy
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60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic |
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#85 |
18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
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Re: I'm COLD. NEED HEAT. GOING MAD
Its the core.
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... ![]() |
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#86 |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
Awbrown,
I placed my finger inside the T fitting, and the temp sensor doesn't protrude enough into the fitting to cause a restriction. Besides, it's on the return line. I DO have the economy heater. The only controls I have are fan speed (by twisting the knob) and the heat on/off (by means of the flap in the plenum) PGsigns, I have blocked off pretty much all the holes in the firewall by whatever means I had. I don't have enough money to seal the cab as well as i'd like. I can't find any of the deluxe heaters near me, but I'm thinking I will have to build a box sometime soon. This will probably happen once I drop in the LT1 i'm re-sealing. I had already cleared the core as being faulty due to the fact that I KNOW that coolant is flowing just fine through it. I have yet to add that gasket, but I will be doing that during my lunch. I'll know more this afternoon/evening. thanks for putting up with me guys...
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#87 |
18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
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Re: I'm COLD. NEED HEAT. GOING MAD
The core can still flow coolant but not be efficient. It will flow thru the very edge without going thru all the fins thus the outlet line is much cooler than the inlet. I would swap it for a cheap new one as suggested to confirm.
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... ![]() |
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#88 |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
that's true. I guess I didn't think of that...I'll get the core tonight, and swap in in on thursday.
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#89 |
Never Ending Projects
Join Date: Jul 2006
Location: San Diego, CA
Posts: 3,836
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Re: I'm COLD. NEED HEAT. GOING MAD
If the economy heater is the same that I had in my '65, the twist knob on the dash also pulls out to allow which allows hot air through. I had the lever underneath that would route the air to the floor or the defrost vents in the dash.
Are you sure your knob isn't connected via a cable to the heater and it needs to be pulled out? That is what allows the hot air into the cab.
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. 1965 C10 Panel, ![]() 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often... |
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#90 | |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
Quote:
The plenum and the vents at the dash have plenty of airflow. The problem is that it's blowing cool/ mildly warm air. If I let the truck sit and idle for a long while, it'll get warm, but if I put the fan on high, the temp drops rapidly. I might be getting about 80 degree air for about 5 minutes, but as soon as i turn the fan on high, it's down almost 20 degrees. I have the core, I'm gonna try and swap it in on my lunch. I still don't think it's the core, but I'll give it a shot at this point.
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#91 |
Registered User
Join Date: Oct 2012
Location: Philly, PA
Posts: 537
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Re: I'm COLD. NEED HEAT. GOING MAD
Changing my core made a huge difference, hope the same is true for you. I typically run the heater on the medium setting and on a cold day the truck is usually plenty warm after 10 miles of driving. At that point, the air is hot, but not scorching. BTW, the replacement core I purchased wasn't an exact fit, I had to fabricate a new support for the 2 pipes that enter the box ... here's a pic.
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My truck ain't dead, it just smells funny. |
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#92 | |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
Quote:
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#93 | |
Never Ending Projects
Join Date: Jul 2006
Location: San Diego, CA
Posts: 3,836
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Re: I'm COLD. NEED HEAT. GOING MAD
Quote:
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. 1965 C10 Panel, ![]() 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often... |
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#94 |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
Ok, another update.
I got the core swapped out. I re-sealed the airbox and the plenum with foil tape, and made sure to include a cardboard seal between the core and the upper airbox lid. Even the cowl got some tape. The end result? With the engine slightly warm, ive got almost 110 degrees out of the outlets! I was REALLY hoping the core wasnt at fault, but it did end up being a core issue. Im sorry I didnt listen to you guys sooner.
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#95 |
Registered User
Join Date: Oct 2009
Location: Austin, Texas
Posts: 241
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Re: I'm COLD. NEED HEAT. GOING MAD
ACK: Nice job on the heater pipe bracket fab!
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#96 |
Registered User
Join Date: Nov 2011
Location: Omaha, Nebraska
Posts: 435
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Re: I'm COLD. NEED HEAT. GOING MAD
Now that's cooking with oil! Congrats on having your perseverance pay off - it doesn't always work out that way...
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Travis' Tribute Truck - 65 C10 Frame Up Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=495073 |
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#97 |
18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
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Re: I'm COLD. NEED HEAT. GOING MAD
With that core being that old, there is no amount of cleaning that will clear it out... I have tried...
Glad you got heat. ![]()
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... ![]() |
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#98 |
Registered User
Join Date: Aug 2009
Location: Detroit MI
Posts: 1,209
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Re: I'm COLD. NEED HEAT. GOING MAD
ask me how i knew ... sometimes others (myself) have had the same assumptions and had to come to the same conclusion..
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#99 |
Registered User
Join Date: Sep 2014
Location: Salt Lake City, UT
Posts: 346
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Re: I'm COLD. NEED HEAT. GOING MAD
Yeah, i should have just started with the core, but it didnt make sense that the core was flowing well.
Thanks for putting up with me guys. Btw, ive got a new problem. The truck is running very, VERY warm. The gauge is reading almost 3/4 of the way to all the way hot. This is the original issue i had running a 195 thermostat. I'm gonna get a different gauge that indicates in degrees, but until then, i need to figure this out.
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2013 Malibu LTZ 1996 C1500 4.3/5spd 2wd |
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#100 |
18 Till I Die
Join Date: Mar 2005
Location: Alberta, Canada
Posts: 1,522
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Re: I'm COLD. NEED HEAT. GOING MAD
Start with the gauge and verify it is hot. How old is the rad? Direct drive fan or clutch?
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2011 GMC Acadia 1969 GMC BBC LS7 2007 GMC Crew Duramax 1987 Camaro Iroc 350 Tuned Port Injection 42000Km 1987 Chevrolet Silverado 350 TBI 1987 Chevrolet Silverado 350 TBI(yes 2) Take me drunk, I'm too home... ![]() |
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blower, core, heater, heating, radiator |
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