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02-09-2025, 07:28 PM
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#1 |
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Registered User
Join Date: Nov 2011
Location: USA
Posts: 436
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Is my heater box blower motor gasket installed correctly?
I am trying to install my heater box back on engine bay firewall of my 68 Chevy C10 and having some difficulty.
Do I have this big rubber round gasket installed on the box incorrectly? It is the one that goes to the back of the heater blower motor. Here is a pic. EDIT: DO NOT buy Summit Racing heater box gasket set part SUM-RP22236 for 67-72 Chevy/GMC truck without AC. The round firewall gasket is too thick and will not allow you to bolt up your heater box to the firewall. The other gaskets in the kit are fine to use but you would have to buy another big rubber gasket for the heater blower area. Last edited by HeavyHauler; 02-09-2025 at 08:35 PM. |
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02-09-2025, 10:00 PM
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#2 |
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Registered User
Join Date: Nov 2011
Location: USA
Posts: 436
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Re: Is my heater box blower motor gasket installed correctly?
I am not able to find the correct heater blower motor firewall seal like the one in this video. Anybody know where I can find one?
Last edited by HeavyHauler; 02-09-2025 at 10:05 PM. |
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02-09-2025, 10:12 PM
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#3 |
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Senior Member
 
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,936
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Re: Is my heater box blower motor gasket installed correctly?
It may be possible for you to trim the gasket to make it have less depth. If that doesn't work, the video shows the gasket set is from LMC.
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Yesterday, 01:49 AM
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#4 |
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Senior Member
 
Join Date: Feb 2009
Location: Northern Nevada
Posts: 7,370
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Re: Is my heater box blower motor gasket installed correctly?
I bought mine from Classic Heartbeat, fits like it's supposed to.
__________________
Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly guide (kit) for restoring this truck from the ground up, complete with details including full hardware descriptions. Much of the info. applies to all 67-72 GM. My build thread, with some info. about the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025 |
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Yesterday, 12:26 PM
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#5 |
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Senior Member
Join Date: Dec 2014
Location: Edmonton Alberta
Posts: 1,495
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Re: Is my heater box blower motor gasket installed correctly?
I just installed mine, same. It's a bit annoying because it likes to fall off while you getting ready to install the box. It seems too deep to fit on the firewall but that's because you have to "schmoosh" it down: it creates a strong seal. Get it seated and press it hard onto the firewall, while someone else bolts it down.
__________________
DAVE Edmonton, Alberta 1959 Apache 1967 K20 1968 C20 1970 C10 1972 GMC 2500 1981 C10 |
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Yesterday, 06:27 PM
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#6 |
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Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,550
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Re: Is my heater box blower motor gasket installed correctly?
I had to use contact cement to get mine to stay in place we I installed it. For more information see post 1032 in the link.
http://67-72chevytrucks.com/vboard/s...698377&page=42
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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