Heater core is out but questions remain. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

In The Ten Ring · 08-09-2015, 04:39 PM

Yay! The heater core is now out but I still have some questions.

There were some leaves and pine needles in there, can I just use a blower to flush out anything else in the ducting?

The fan cover is riveted on in places, is it OK to go back with a bolt, nut and lock washer?

Do I need to paint the fan itself?

What sort of caulking do I use to put the cover back together?

What sort of caulking to put the assembly back onto the cab?

Where can I get a new rubber flange for the fan part?

I'm taking the core over for a royal flush and pressure test tomorrow, I"ll get a new one if need be.

**LockDoc** · 08-09-2015, 05:04 PM

See notes below....

Quote:

Originally Posted by In The Ten Ring

Yay! The heater core is now out but I still have some questions.

There were some leaves and pine needles in there, can I just use a blower to flush out anything else in the ducting?

Don't see why not.

The fan cover is riveted on in places, is it OK to go back with a bolt, nut and lock washer?

You shouldn't need to take that off, just unbolt the blower motor to clean that area out.

Do I need to paint the fan itself?

Only if you want to.

What sort of caulking do I use to put the cover back together?

Get a heater gasket set.

What sort of caulking to put the assembly back onto the cab?

See above

Where can I get a new rubber flange for the fan part?

See above.

I'm taking the core over for a royal flush and pressure test tomorrow, I"ll get a new one if need be.

LockDoc

EARNHARDT#3 · 08-09-2015, 07:29 PM

The heater core seal kit I got from Classic Parts was junk. The stuff for the outer box was a real poor way of doing it. They gave you a wad of it and the directions said something like "knead this and make it into a string 1/8" thick and 35" long".

asolde · 08-09-2015, 07:50 PM

You really should get a seal kit from LMC to put it back together. I'm thinking you could use cork / dumb dumb tape to seal it back on the firewall. Replace the heater core while it's out. This is a job you don't want to do again for a long time. Good luck

08-09-2015, 04:39 PM	#1
In The Ten Ring Registered User Join Date: Jun 2013 Location: West Virginia Posts: 6,427	Heater core is out but questions remain. Yay! The heater core is now out but I still have some questions. There were some leaves and pine needles in there, can I just use a blower to flush out anything else in the ducting? The fan cover is riveted on in places, is it OK to go back with a bolt, nut and lock washer? Do I need to paint the fan itself? What sort of caulking do I use to put the cover back together? What sort of caulking to put the assembly back onto the cab? Where can I get a new rubber flange for the fan part? I'm taking the core over for a royal flush and pressure test tomorrow, I"ll get a new one if need be.

08-09-2015, 07:50 PM	#4
asolde Registered User Join Date: Apr 2012 Location: Henderson Nevada Posts: 804	Re: Heater core is out but questions remain. You really should get a seal kit from LMC to put it back together. I'm thinking you could use cork / dumb dumb tape to seal it back on the firewall. Replace the heater core while it's out. This is a job you don't want to do again for a long time. Good luck __________________ 1972 cheverolet K5 CST Blazer 350/auto/AC/PS/PB/Aux Batt From Medford, Oregon

08-09-2015, 07:29 PM	#3
EARNHARDT#3 Registered User Join Date: May 2014 Location: PA Posts: 1,417	Re: Heater core is out but questions remain. The heater core seal kit I got from Classic Parts was junk. The stuff for the outer box was a real poor way of doing it. They gave you a wad of it and the directions said something like "knead this and make it into a string 1/8" thick and 35" long". __________________ 1967 C10, LWB, 250, Powerglide, PS, PB, 3/4 STATIC DROP



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