The old topic -trunk lid seal - how to close?!?

7173Mustangs.com

Help Support 7173Mustangs.com:

Joined
Jul 10, 2011
Messages
2,046
Reaction score
544
Location
Germany, Southwest, Black Forest
My Car
1973 Ford Mustang Mach 1 T5 Q-Code 4-Speed
After I installed the Daniel Carpenter trunk seal (without air holes) correctly I cannot get the trunk closed. I applied some pressure from above, nothing. Slamming does also nothing, the lid bounces back. The trunk lid is adjusted in line perfeclty, the lock and lock catch in the trunk are also in line and I adjusted them that they could "find" each other easily and then torqued the bolts from the inside. Also the lock catch I aligned it all out so it would have been an easy catch for the lock. Nevertheless the rubber is so stiff - do I have apply so much brute force?!? I know that there were some advices in the past for burning some holes in the rubber for a more easy-out of the air trapped in the rubber-channel. Is this the real thing? Had the original seal these holes? After burning them in did someone experience a better closing? 

After so many years in this forum I know it is a common problem. But nobody has posted a definite solution or a success update how it went in the end. 

Would be happy to hear a feedback. Such little problems which eat hours are enerving - I have to spend these time on so many other spots on the car...  :classic_mellow:

 

Hemikiller

Well-known member
Staff member
7173 Mustang Supporter Member
Moderator
Joined
Jul 12, 2010
Messages
3,998
Reaction score
1,315
Location
Killingworth, CT
My Car
71 Mach 1
71 XR-7 coupe
71 Country Squire
65 coupe
I recently replaced the one I installed in 2006. Didn't add any holes, but did leave about an 1/8" gap at the butt ends by the latch to allow air to escape. If you butt those ends, the seal becomes a balloon. I installed the seal and left the trunk closed for a couple weeks. It's still a bit tough to close, but with the right effort it's not a problem. 

One thing many miss is to lubricate the seals with silicone. 

 
Joined
Jul 10, 2011
Messages
2,046
Reaction score
544
Location
Germany, Southwest, Black Forest
My Car
1973 Ford Mustang Mach 1 T5 Q-Code 4-Speed
That sounds like a good option. The butt ends of my rubber seal are to close together and if I press the lid I hear some kind of air wants to escape... So I will have a look on it and work out a larger gap. Then left it closed after I restored my tail lamps and side markers. 

What's the thing with the silicone? Is it meant to soften the rubber and to let it be smooth like the usual rubber seal conditioners? 

 

Hemikiller

Well-known member
Staff member
7173 Mustang Supporter Member
Moderator
Joined
Jul 12, 2010
Messages
3,998
Reaction score
1,315
Location
Killingworth, CT
My Car
71 Mach 1
71 XR-7 coupe
71 Country Squire
65 coupe
Silicone acts as a lubricant allowing the seal to slide across the painted surfaces. Helps more with door seals and such, but I apply it to the trunk seal as well. 

 

Sheriff41

Well-known member
Joined
Aug 5, 2019
Messages
590
Reaction score
368
Location
Texas
My Car
72 Mustang Q-code
I use the 303 Rubber Seal Protectant on the weather stripping on all my cars.  Works well and no smell like some silicones have. 

 

bdennis

Well-known member
Joined
Apr 3, 2021
Messages
167
Reaction score
57
Location
Melbourne, Australia
I put a new seal in mine (no holes) and adjusted the catch. It takes a bit of a push, note quite a slam to get it to close. Nice and tight seal on mine. 

I have not added any glue / silicone to mine. Fits into the channel fairly well. If rubbed or knocked it will pop out, but I just put up with it and push it back in place.

 
Joined
Jul 10, 2011
Messages
2,046
Reaction score
544
Location
Germany, Southwest, Black Forest
My Car
1973 Ford Mustang Mach 1 T5 Q-Code 4-Speed
Joined
Jul 10, 2011
Messages
2,046
Reaction score
544
Location
Germany, Southwest, Black Forest
My Car
1973 Ford Mustang Mach 1 T5 Q-Code 4-Speed
I put a new seal in mine (no holes) and adjusted the catch. It takes a bit of a push, note quite a slam to get it to close. Nice and tight seal on mine. 

I have not added any glue / silicone to mine. Fits into the channel fairly well. If rubbed or knocked it will pop out, but I just put up with it and push it back in place.
Thanks, Dennis! 

So I will look for a wider gap on the rubber butts and will looking forward to a then hopefully closed lid! 

 

Latest posts

Top