The parts book calls for a 3949921 seal for the defroster duct where it contact with the slot in the bottom of the dash panel. What are you guys using? Thanks, Joe
(https://lh3.googleusercontent.com/pw/ACtC-3eIXnhBaym4AX15LdrSgMwcV9nVDwbd169vCEjB1BMiepXys5Tft9wikoMEVhVDA4m8SEj9M_lde4pxhZD4XdgCbGNgBYwIDWeKKnJvzoJZanssbeXp7Yk8aBVwvJzT0vVfTUhhH_wu9hXGIC3bRmFZHA=w1281-h854-no?authuser=0)
I used this same type of foam, it has a thin plastic backer that has adhesive on it.
The stuff I pulled off the original duct looked similar - clear plastic backing, with what appeared to be remnants of open cell foam.
It compresses well and fills the gap eliminates another rattle point etc...
FWIW I am pretty sure that the gauge lenses or bezels have foam strips at the top, very narrow 1/4" wide x 1/4" high 2" long open cell foam just keeps things from rattling when you are driving or closing the doors.
I use it on the the vent duct outlets and most, if not all of vent duct joints.
This is my brother's 73 Z but first gens have similar albeit round ducts - I use which ever height foam I need to fill the gap on ducts, but not so much that it is at all difficult to push the duct on the other.
(https://nastyz28.com/attachments/102_9506-jpg.56981/)
I got it at lowes or home depot.
I imagine the longevity may be double that of the originals... lol
Thank you James. That's what I was thinking due to what was left at the top. Off to get some this morning....Joe
The duct seal on my car has completely disintegrated so I used the HAC-1030 seal kit from HBC which is a Re-pops product. The distribution duct-to-underdash seals in the kit are made from a denser cell foam material that allows the duct to be seated firmly but won't over-compress so the plastic duct doesn't contact the dash and cause a buzz or rattle. The rest of the kit is horrible, unusable actually, but the duct to underdash seals are good and well formed. I used 3M Weatherstrip Adhesive which sets up in a few minutes and doesn't dissolve the foam seal.
(https://live.staticflickr.com/65535/50751964862_8d2b4467e4_c.jpg) (https://flic.kr/p/2kjM5YW)
(https://live.staticflickr.com/4895/32333045908_95fb414a1d_c.jpg) (https://flic.kr/p/Rgaj5L)
Thanks Lloyd...Joe
Remember to install the White wire which crosses from door jamb switch to door jamb switch prior to the distribution duct - you probably can't get it behind the duct after installed.
Here is a photo of N633599 - you can see the wire is behind the duct then through the hook at the center of the dash then behind the pass side duct.
(https://lh3.googleusercontent.com/pw/ACtC-3eLv0fDvygSkfhH8M8NpANkqnPbMiGGA138HHeC8rtGQkovcm6shKTB47nfiwOrWtlw1byPzJVmVVos6pg25msJUz0bQkKnSAc2OrMTNXpeXlB6BWqPLWheGiTlqMub82wOxKFsyGxtOo2-MJVxx7WNRg=w1179-h884-no?authuser=0)
It also goes between the dash top and the brake clutch pedal support
N633599
(https://lh3.googleusercontent.com/pw/ACtC-3c1RdcE7WldonuTv-spyBlg4oIi8w6IGVMOV4lT3MBrOFYaYsHEeNSXsqatgoWQCp8xQu5c4oIZsow4sL7-NMIiQHuu02D6yOcupxuM1TOoqGeRtxTMTPrw2xNWFRe00f_zNQ9goBn_86fJfoSuo8aLjg=w1179-h884-no?authuser=0)
(https://lh3.googleusercontent.com/pw/ACtC-3dvrQAYujj1K9NM1sscQzo1b4UPFvENYDt1ageGvAqo8ONDEyVnhCfbRUF_4iOb_PUhbH9FbGNLWm1iCkBNBoi0NfJc15ytETDyWIqfHdr5lzrIiboZxRBEyLyAyRM2UYzGcpganium3kFsz-m2i_2xtw=w1179-h884-no?authuser=0)
Thanks James. I also figured out the oil line goes back there. Lots to remember after 2.5 years. If you take 100 pictures, you will need 200 more....Joe