NO HEAT..new radiator, new heater core, new thermostat - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #1 of 23 (permalink) Old 09-11-2012, 01:32 PM Thread Starter
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NO HEAT..new radiator, new heater core, new thermostat

I have a 67 galaxie, with a 390 engine. Last fall the heater would heat you out of the car. Now, the heat is warm at best. I have changed the radiator, heater core and put in a new 190F thermostat. It's STILL ONLY warm. What am I missing? The only other thing I can think of is the coolant is primarily water as I keep changing parts. Its not a 50/50 mix as it usually is. Is this my problem?
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post #2 of 23 (permalink) Old 09-11-2012, 02:24 PM
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You may have a air pocket in heater core. How do you the heater hoses hooked up?
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post #3 of 23 (permalink) Old 09-11-2012, 02:30 PM
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Re: NO HEAT..new radiator, new heater core, new thermostat

X2 is all back the same?
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post #4 of 23 (permalink) Old 09-11-2012, 02:36 PM
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Re: NO HEAT..new radiator, new heater core, new thermostat

Did or does it have factory A/C?

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post #5 of 23 (permalink) Old 09-11-2012, 03:38 PM
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Re: NO HEAT..new radiator, new heater core, new thermostat

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Did or does it have factory A/C?
If so make sure the hot water shutoff is opening..If that checks out then try feeling both heater hoses to see if they are equally hot..If not you probably have an air pocket in the heater core or at least something restricting the flow..


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post #6 of 23 (permalink) Old 09-11-2012, 05:18 PM
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Re: NO HEAT..new radiator, new heater core, new thermostat

A good way to remove an air pocket, is run the car up on ramps and idle it with the radiator cap off. It's going to get hot and spew water/coolant all over, but keep an eye on the temp and keep adding water or coolant and it'll "burp" out the air. By putting the front of the car up, the air will work its way to the highest point and TA DA!

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post #7 of 23 (permalink) Old 09-11-2012, 05:35 PM
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Re: NO HEAT..new radiator, new heater core, new thermostat

If you have the water hose from the intake go straight to the core and the restriction (the water valve) is on the way back to the water pump, you will blow out the core, when you go WOT, see MY pic. Needs to be the other way around.
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Putts drives a 1965 customized Galaxie. Rebuilt 390, 4100 electric choke on a Performer, MX, AC, PS, PB w Scarebird front discs on Cragar 17" S/S.
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post #8 of 23 (permalink) Old 09-13-2012, 09:15 PM
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Re: NO HEAT..new radiator, new heater core, new thermostat

Make sure your thermostat is working or that it is the right size. I know that there is a large thermostat on my 390 and the small one let water bypass it.
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post #9 of 23 (permalink) Old 09-14-2012, 02:32 AM
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Post Re: NO HEAT..new radiator, new heater core, new thermostat

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Originally Posted by puttster View Post

you will blow out the core, when you go WOT, see MY pic.
Just a note...

the FOX MUST PI had a restrictor in the heater hose to prevent this @ HI-RPM.

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post #10 of 23 (permalink) Old 09-14-2012, 03:48 AM
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Re: NO HEAT..new radiator, new heater core, new thermostat

Forgot that one, there was a change in april 1967, think it was change level 7 ? from large to small T-stat. Have taken apart more than 1 67 and found small T-stat laying inside of intake.
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post #11 of 23 (permalink) Old 09-14-2012, 05:12 AM
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Post Re: NO HEAT..new radiator, new heater core, new thermostat

Just a thought... I Know... I Know...

Proper routing of the heater hoses is manifold (behind thermostat) to heater core. If hot water control valve, to this first as you don't want hot water (convection) in the core during summer. The return hose goes to the pump.

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post #12 of 23 (permalink) Old 09-14-2012, 05:18 AM
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Post Re: NO HEAT..new radiator, new heater core, new thermostat

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Originally Posted by Roberts547 View Post

The only other thing I can think of is the coolant is primarily water as I keep changing parts. Its not a 50/50 mix as it usually is. Is this my problem?

Thanks
No. Actually water (distilled) dissipates heat better than a coolant mixture but then you have corrosion problems.

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post #13 of 23 (permalink) Old 09-14-2012, 08:22 AM
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Re: NO HEAT..new radiator, new heater core, new thermostat

It's simply flow issues I think. Wonder if he'll fix it then report back on what the fix actually was.

And Putts, I've NEVER seen a water pump do THAT to a heater core! DAMN! I've seen them FREEZE and do that but not from RPM. And I Know it's not from freezing down there in TX....
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post #14 of 23 (permalink) Old 09-14-2012, 06:18 PM
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Re: NO HEAT..new radiator, new heater core, new thermostat

That's probably because you always route your hoses correctly. I say it was due to pump pressure but that's only because I don't know what else it could have been.
I wonder tthough, if your car does not have a water valve or something to restrict pressure are you supposed to run a 5/8" hose into the heater and a 3/4 one out?

Finally I agree with 5851a, I think the 67 intake takes the large thermostat and those are hard to find.

Putts drives a 1965 customized Galaxie. Rebuilt 390, 4100 electric choke on a Performer, MX, AC, PS, PB w Scarebird front discs on Cragar 17" S/S.
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post #15 of 23 (permalink) Old 09-14-2012, 09:05 PM
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Re: NO HEAT..new radiator, new heater core, new thermostat

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Originally Posted by puttster View Post
Finally I agree with 5851a, I think the 67 intake takes the large thermostat and those are hard to find.
Got one @ NAPA no problem. Just told them I needed the larger style and they had it on the shelf with the gasket. PO had the small version in there and just the gasket was holding it in place.

Greg
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