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Old 12-08-2014, 01:46 AM   #1
Gregski
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Blower Air Inlet Assembly Gasket or RTV or Nothing.

Hope you can help me. When I removed the blower air inlet assembly off my '74 GMC half ton (non AC truck) I did not find much in the way of a gasket between it and the firewall, and I don't see anything on LMC Truck site for it, nor could I find anything at AutoZone or NAPA.

So should there be a gasket there of some sorts, do I make one out of cork, or do I use RTV? Please advise
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Old 12-08-2014, 01:56 AM   #2
78maliburat
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Re: Blower Air Inlet Assembly Gasket or RTV or Nothing.

SILICONE
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Old 12-08-2014, 05:38 AM   #3
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Re: Blower Air Inlet Assembly Gasket or RTV or Nothing.

I used seam sealer, though iirc, there wasn't anything on there.
Personally, I wouldn't use silicone on the body panels. Everyplace the PO did use it, it rusted, though it may take years for it to show up.
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Old 12-08-2014, 05:45 AM   #4
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Re: Blower Air Inlet Assembly Gasket or RTV or Nothing.

Yeah seam sealer will last the longest their.
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Old 12-08-2014, 06:34 AM   #5
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Re: Blower Air Inlet Assembly Gasket or RTV or Nothing.

My 83 had a urethane foam weatherstripping. I used house door dense urethane weatherstripping from Home Depot. I used the sticky side on the box.
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Old 12-08-2014, 11:43 AM   #6
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Re: Blower Air Inlet Assembly Gasket or RTV or Nothing.

Quote:
Originally Posted by donut View Post

... Personally, I wouldn't use silicone on the body panels...
Yeah, a bit reluctant to go that route, thanks.
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Old 12-08-2014, 12:31 PM   #7
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Re: Blower Air Inlet Assembly Gasket or RTV or Nothing.

I would use what is commonly called "dumb dumb". This has been used by the factory for many years. Here's a link. Amazon.com: 3M 08578 Black 1' Strip Calk:... Amazon.com: 3M 08578 Black 1' Strip Calk:... If you don't want to go the Amazon route, any auto body supply should either have it i stock or can easily get it for you.
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Old 12-08-2014, 08:08 PM   #8
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Re: Blower Air Inlet Assembly Gasket or RTV or Nothing.

Quote:
Originally Posted by mrolds88 View Post
I would use what is commonly called "dumb dumb". This has been used by the factory for many years. Here's a link. Amazon.com: 3M 08578 Black 1' Strip Calk: Automotive If you don't want to go the Amazon route, any auto body supply should either have it i stock or can easily get it for you.
got it, thank you very much, here's some pics to show others what this stuff looks like, I think you find this behind your door panels its what holds the clear plastic or paper insulation to the metal
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Old 12-08-2014, 10:29 PM   #9
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Re: Blower Air Inlet Assembly Gasket or RTV or Nothing.

That's the stuff that I'd use. Mine was ordered, but didn't show, so seam sealer got used. I did have the urethane that tucsonjwt mentioned, think I used that on my transmission hump.
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