Question about heater core? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jorgensensc · 01-07-2004, 12:44 PM

I'n trying to seal up my cab a bit and have a question. where the heater core connections come out of the heater box is very open and I lose a lot of air through those openings. Is there something you can put around those to seal up the box some. I always see some black stuff on A.C. boxes, but I never see any on heater boxes. Would plumbers putty work? Any help would be appreciated!!! Thanks!
Shawn

*Randy70C-10* · 01-07-2004, 01:03 PM

I'm probably going to use black RTV around mine. Alot of the fuel smell probably comes through there too.

jorgensensc · 01-07-2004, 01:08 PM

Your probably right aboutthe fuel smell. Black RTV, HHMMMMMM.

**Classic Heartbeat** · 01-07-2004, 01:34 PM

I cut foam rings and placed them around the tubes and then installed the core into the housing. Seals out the air fine and also wont make the tubes stick to the brittle housing. If you ever have a need to replace the core, you could dammage the housing tryint to take it apart with the RTV there. WES www.ClassicHeartbeat.com

da-burb · 01-07-2004, 01:41 PM

black foam pipe insulation at the hardware/lumber yard works. I have also used carpet pad in a pinch on a beater truck.

Primed67 · 01-07-2004, 01:46 PM

I plan on using 3M Flexible Strip Caulk 20 yd. Eastwood carries it and it is affordable.

http://www.eastwoodco.com/itemdy01.a...1.x=57&I1.y=56

Earl Junior · 01-07-2004, 01:53 PM

I used the black foam pipe insulation like da-burb. I think I got 10 feet for less than $5.

Blue Beard · 01-07-2004, 01:59 PM

I'm surprised that someone hasn't come out with a plug to fit these openings around the pipes......

jorgensensc · 01-07-2004, 02:06 PM

WOW!! Thanks for all the great info guys!!! I will probably go the foam route now that I know about it.
Blue Beard, I agree, it is suprising. Maybe you should start.

**old Rusty C10** · 01-07-2004, 04:08 PM

for the heater box to firewall i made a gasket out of the foam weather stip that has adhesieve on one side like youd use on a door 3M makes it and ya find it in Home Depot. I made rubber gaskets out of the pipe insulation for the around the heater core outlets . Ive recently replaced the holes throught he firewall where the clutch foes through with new rubber pieces.
by the way if ya got a floor shift the rubber insulation makes a great shifter insulation

01-07-2004, 12:44 PM	#1
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Question about heater core? I'n trying to seal up my cab a bit and have a question. where the heater core connections come out of the heater box is very open and I lose a lot of air through those openings. Is there something you can put around those to seal up the box some. I always see some black stuff on A.C. boxes, but I never see any on heater boxes. Would plumbers putty work? Any help would be appreciated!!! Thanks! Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

01-07-2004, 01:08 PM	#3
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Your probably right aboutthe fuel smell. Black RTV, HHMMMMMM. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

01-07-2004, 01:34 PM	#4
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,768	I cut foam rings and placed them around the tubes and then installed the core into the housing. Seals out the air fine and also wont make the tubes stick to the brittle housing. If you ever have a need to replace the core, you could dammage the housing tryint to take it apart with the RTV there. WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

01-07-2004, 01:41 PM	#5
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	black foam pipe insulation at the hardware/lumber yard works. I have also used carpet pad in a pinch on a beater truck. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

01-07-2004, 01:46 PM	#6
Primed67 Registered User Join Date: Sep 2003 Location: Tyler Posts: 575	I plan on using 3M Flexible Strip Caulk 20 yd. Eastwood carries it and it is affordable. http://www.eastwoodco.com/itemdy01.a...1.x=57&I1.y=56 __________________ 1969 Chevrolet SWB Stepside 1959 Chevrolet apache * Sold 1967 Prostreet Chevy SWB Fleetside Sold 2014 1/2 ton Crew Cab Chevrolet 4x4 Last edited by Primed67; 01-07-2004 at 01:52 PM.*

01-07-2004, 01:03 PM	#2
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	I'm probably going to use black RTV around mine. Alot of the fuel smell probably comes through there too.

01-07-2004, 01:53 PM	#7
Earl Junior Cadillac power Join Date: Oct 2002 Location: North Idaho Posts: 296	I used the black foam pipe insulation like da-burb. I think I got 10 feet for less than $5. __________________ Just for the record, if I'm down to my last potato, I'm not sharing it with a guy who wants to kill me so he can get a better supply of virgins in paradise. That lesson is a little thing I call Economics 101, infidel style. --Scott Adams author of Dilbert

01-07-2004, 01:59 PM	#8
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	I'm surprised that someone hasn't come out with a plug to fit these openings around the pipes...... __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

01-07-2004, 02:06 PM	#9
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	WOW!! Thanks for all the great info guys!!! I will probably go the foam route now that I know about it. Blue Beard, I agree, it is suprising. Maybe you should start. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

01-07-2004, 04:08 PM	#10
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,302	for the heater box to firewall i made a gasket out of the foam weather stip that has adhesieve on one side like youd use on a door 3M makes it and ya find it in Home Depot. I made rubber gaskets out of the pipe insulation for the around the heater core outlets . Ive recently replaced the holes throught he firewall where the clutch foes through with new rubber pieces. by the way if ya got a floor shift the rubber insulation makes a great shifter insulation __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

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