Heater upgrades? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

imaindianoutlaw · 10-26-2002, 07:57 PM

I have a standard non a/c truck that I would like to make the heater work a little better is there any tricks out there to do? Saw a switch at GMC Pauls for fan speed? Mine seems to have poor air flow? Is that normal? I am use to my 98 Ford work van that the heater kicks @$$ in!

jasonrog · 10-26-2002, 08:17 PM

I bought my 71 from my brother in law. He said he put in a heater core from a ford. The largest one that would fit. Up here in the north, I can ride around in my truck in a t shirt when its -40 outside! It's great

imaindianoutlaw · 10-26-2002, 10:26 PM

Wish I knew what core that was! I would also like to increase air flow! I should pull my motor and see what the blower wheel looks like?

OLDCHEV4X4 · 10-26-2002, 10:47 PM

Yea, check the squirl cage on the fan. Mine was cracked and broken. It looked like the mice were chewing on it. Also i had leaves in the heater box that were obstructing the flow and cracked and broken defroster ducts. I got good heat now. It will make your feet sweat! Also put anti-seize on your wire going into the control cable so you dont break off those heater control leavers. They always break off.
Randy

Longhorn Man · 10-26-2002, 11:36 PM

Heres a good tip on this subject...the heater blower moter from an older caddy is a direct bolt in, and blows a little harder.

chewed 71'er · 10-26-2002, 11:53 PM

Yeah, typical in these trucks, check your heater box, might be loaded with trash. Similar story, mouse nest in mine, chewed up 3 or 4 fan blades. Replaced heater core (leaking), installed new fan, heater works great. Just don't want to 'test it' at 40 below zero!

jasonrog · 10-27-2002, 11:13 PM

I forgot to mention that I have a 205 degree thermostat. Boy does it make a difference!!

10-26-2002, 07:57 PM	#1
imaindianoutlaw GMC SHORT FLEET F/S Join Date: Jun 2000 Location: SOUTH WILLIAMSPORT PENNSYLVANNIA Posts: 2,117	Heater upgrades? I have a standard non a/c truck that I would like to make the heater work a little better is there any tricks out there to do? Saw a switch at GMC Pauls for fan speed? Mine seems to have poor air flow? Is that normal? I am use to my 98 Ford work van that the heater kicks @$$ in! __________________ CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P.

10-26-2002, 10:26 PM	#3
imaindianoutlaw GMC SHORT FLEET F/S Join Date: Jun 2000 Location: SOUTH WILLIAMSPORT PENNSYLVANNIA Posts: 2,117	Wish I knew what core that was! I would also like to increase air flow! I should pull my motor and see what the blower wheel looks like? __________________ CHARLES WADE HEIN HVACR FOREMAN. LEWISBURG U.S.P.

10-26-2002, 10:47 PM	#4
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	Yea, check the squirl cage on the fan. Mine was cracked and broken. It looked like the mice were chewing on it. Also i had leaves in the heater box that were obstructing the flow and cracked and broken defroster ducts. I got good heat now. It will make your feet sweat! Also put anti-seize on your wire going into the control cable so you dont break off those heater control leavers. They always break off. Randy __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania

10-26-2002, 08:17 PM	#2
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	I bought my 71 from my brother in law. He said he put in a heater core from a ford. The largest one that would fit. Up here in the north, I can ride around in my truck in a t shirt when its -40 outside! It's great

10-26-2002, 11:36 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Heres a good tip on this subject...the heater blower moter from an older caddy is a direct bolt in, and blows a little harder.

10-26-2002, 11:53 PM	#6
chewed 71'er Registered User Join Date: Mar 2002 Location: KC, NW Missouri Posts: 144	Yeah, typical in these trucks, check your heater box, might be loaded with trash. Similar story, mouse nest in mine, chewed up 3 or 4 fan blades. Replaced heater core (leaking), installed new fan, heater works great. Just don't want to 'test it' at 40 below zero!

10-27-2002, 11:13 PM	#7
jasonrog Registered User Join Date: Sep 2000 Location: Winnipeg, Manitoba Canada Posts: 248	I forgot to mention that I have a 205 degree thermostat. Boy does it make a difference!!



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