Tmac Posted November 12, 2023 Share Posted November 12, 2023 This is the defroster Y duct that attaches to the top of the heater box. it is screwed into the holes up by the windshield but does not sit down tight on the vent in the top of the heater box. I cant push the heater box up anymore and i am not finding a seal or anything that would fill this 3/8-inch gap. is it supposed to be there, what am i missing? I posted this on the Monte Carlo facebook page also. Quote Link to comment Share on other sites More sharing options...
jft69z Posted November 12, 2023 Share Posted November 12, 2023 My old memory wanted to believe there's a rectangular foam seal that went in there, but checking the Factory Assembly manual shows no seal. I also checked the 69 Camaro manual, because that's what the old memory may have been thinking...no seal there either. Looked at some of the available HVAC box seal replacement kits and don't see that seal in any of them either. 1 Quote Link to comment Share on other sites More sharing options...
Dtret Posted November 12, 2023 Share Posted November 12, 2023 We went through this on another post a long while back. The gap is correct although you, and I also, wouldn’t think so. My 71 also has the gap and I still don’t know that I like it. But it is correct. 1 Quote Link to comment Share on other sites More sharing options...
Tmac Posted November 12, 2023 Author Share Posted November 12, 2023 2 hours ago, jft69z said: My old memory wanted to believe there's a rectangular foam seal that went in there, but checking the Factory Assembly manual shows no seal. I also checked the 69 Camaro manual, because that's what the old memory may have been thinking...no seal there either. Looked at some of the available HVAC box seal replacement kits and don't see that seal in any of them either. I couldnt find anything either, thanks for the research and the pic, its alot better view than mine!!!!! Thank you for your service! 1 Quote Link to comment Share on other sites More sharing options...
Tmac Posted November 12, 2023 Author Share Posted November 12, 2023 53 minutes ago, Dtret said: We went through this on another post a long while back. The gap is correct although you, and I also, wouldn’t think so. My 71 also has the gap and I still don’t know that I like it. But it is correct. yeah, in my mind it just doesnt work, LOL! thank you for the answer. I gues we'll leave it then Quote Link to comment Share on other sites More sharing options...
420ponies Posted November 12, 2023 Share Posted November 12, 2023 I would try some sticky, rubber back insulation tape. has the rubber membrane in it and does not get effected by heat. Not fat mat but something you'd get form Lowe's or Home depot or ACE Hardware.I'm thinking mine has the crappy foam. I'll check and let you know. Quote Link to comment Share on other sites More sharing options...
stangeba Posted November 12, 2023 Share Posted November 12, 2023 My 71 "NO A/C" Monte does NOT have any type of a seal / foam there either. Quote Link to comment Share on other sites More sharing options...
MC-71 Posted November 14, 2023 Share Posted November 14, 2023 There are two different true lengths. I discover that when I was putting mine back together. Had two different ones. Buy 2” black gorilla tape. It’s real sticky. Quote Link to comment Share on other sites More sharing options...
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