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  Mustangsandmore Forum Archive
  '64 1/2 to '68 1/2 -- The Classic Mustang
  No Heat

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Author Topic:   No Heat
rmousir
Gearhead

Posts: 1124
From: Amelia, Ohio
Registered: May 2003

posted 11-02-2004 07:22 PM     Click Here to See the Profile for rmousir        Reply w/Quote
I have a new thermostat and a newer three row rad. I just got the blower motor going and everything should be good. The motor (v8) warms up and is not getting overly hot but there is barely any heat. Should I go to a hoter temp thermostat?

Suggestions?

Richard.

------------------
rmousir
'66 Mustang Coup
Ford Blue & white stripes
302 auto
work in progress -
rmousir@hotmail.com
Check out my site:
My Toy ~ Updated Oct '04

SteveLaRiviere
Administrator

Posts: 48752
From: Saco, Maine
Registered: May 99

posted 11-02-2004 08:16 PM     Click Here to See the Profile for SteveLaRiviere        Reply w/Quote
Are you sure you purged all the air out of the system?

------------------
'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip

65ponycar
Gearhead

Posts: 873
From: Dayton, OH
Registered: Jul 2003

posted 11-02-2004 08:51 PM     Click Here to See the Profile for 65ponycar        Reply w/Quote
and since you went through all the trouble you have on this car, you replaced the HEATER CORE, right?

I've seen 3 65-66 Mustangs with no heat, the culprit being the heater core plugged.

Cables adjusted correctly? Long shot, but maybe. Not much to the 65-66 heating system.

Man when that sucker is working it is enough to burn your toes!

trashline
Gearhead

Posts: 2230
From: Levittown, Pa
Registered: Dec 2003

posted 11-02-2004 08:55 PM     Click Here to See the Profile for trashline        Reply w/Quote
i rescently flushed my system and replaced the heater hoses and core. that thing pumps out some heat. make sure you have enough coolant in the radiator. make sure nothing is clogged. touch both hoses in the engine bay to see if they are hot they should be so hot you cant tough them. can you hear the doors opening and closing? when you move the temp door does the temp change? or stay the same. heater core is probably clogged id say. try to flush out the system

------------------
1966 mustang coupe
200ci, 3.03 3 speed tranny
holley weber two barrel conversion, msd 6a ignition, blaster 2 coil, pertronix, 2 inch exhaust to a glass pac, stock rear (3.20),ram air install complete (homemade)
white w/ black interior, soon be painted antique bronze with the R model apron and gt350 hood scoop (functional)

rmousir
Gearhead

Posts: 1124
From: Amelia, Ohio
Registered: May 2003

posted 11-02-2004 10:26 PM     Click Here to See the Profile for rmousir        Reply w/Quote
I think I have all the air out of the system. No overheating problems and I have driven her hard. I did put in the cooler of the two thermostats though. I checked for hot hoses and the top rad hose was hot as was the top heater hose. The bottom heater hose was not so hot. Think maybe I have a clogged core?

Richard.

------------------
rmousir
'66 Mustang Coup
Ford Blue & white stripes
302 auto
work in progress -
rmousir@hotmail.com
Check out my site:
My Toy ~ Updated Oct '04

65ponycar
Gearhead

Posts: 873
From: Dayton, OH
Registered: Jul 2003

posted 11-02-2004 11:35 PM     Click Here to See the Profile for 65ponycar        Reply w/Quote
quote:
Originally posted by rmousir:
hink maybe I have a clogged core?


Bingo!

Toronado3800
Gearhead

Posts: 1163
From: St. Louis, MO
Registered: Jul 2001

posted 11-03-2004 12:10 AM     Click Here to See the Profile for Toronado3800        Reply w/Quote
If your engine is getting to 160 degrees I'd think your t-stat isn't the problem.

My 68 origional 289 car has a vacuum controlled valve which shuts off flow to my heater core.

To get things working I first had to unclog my controlls on the dash, then recently replace the line running to the under hood valve.

Far as checking a heater core, I've never tried this but does anyone know what happens if you unhook the return hose from the heater core to see if anti-freeze shoots out with the heater on and the engine COOL?

trashline
Gearhead

Posts: 2230
From: Levittown, Pa
Registered: Dec 2003

posted 11-03-2004 10:54 AM     Click Here to See the Profile for trashline        Reply w/Quote
66s dont have any wierd controls for the heat just three controls with cables. no vacuum stuff. now you said the bottom hose wasnt hot going into the core correct that is the hose that should be supplying the core with hot coolant the top hose is return. so obviously your core is clogged up which was stated earlier. i just returned one that i bought and didnt need , but since your replacing the heater core i would order a gasket kit for your heater box. it made a world of difference. and replace any hoses that arnt new. also if you didnt flush your system do it now for the winter. car will love you for it.

------------------
1966 mustang coupe
200ci, 3.03 3 speed tranny
holley weber two barrel conversion, msd 6a ignition, blaster 2 coil, pertronix, 2 inch exhaust to a glass pac, stock rear (3.20),ram air install complete (homemade)
white w/ black interior, soon be painted antique bronze with the R model apron and gt350 hood scoop (functional)

rmousir
Gearhead

Posts: 1124
From: Amelia, Ohio
Registered: May 2003

posted 11-03-2004 01:25 PM     Click Here to See the Profile for rmousir        Reply w/Quote
I just happen to have a new seal kit sitting in my barn waiting to be put on and a 'good shape' heater box as well as an extra blower motor. I will use the seal kit, buy a new core and new hoses for it. Thanks very much for confirming that for me.

Richard.

------------------
rmousir
'66 Mustang Coup
Ford Blue & white stripes
302 auto
work in progress -
rmousir@hotmail.com
Check out my site:
My Toy ~ Updated Oct '04

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