1969 gto deck lid paint crack 1 year after paint
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These cars flexed like crazy. All that torque has to get dispersed.
In the 80's when the IROC craze hit and T-Tops were the big thing, if you looked, most of those cars only had 305's. They werent available with T-tops, 350's, and manual transmissions, unless you special ordered and signed a waiver.
My 79 Trans am with the olds 403, had a crease on the roof, between the Ttops.
What you have there is simply a stress crack. Unavoidable unless you use flex additive. This is why it costs $20k to paint a vette.
In the 80's when the IROC craze hit and T-Tops were the big thing, if you looked, most of those cars only had 305's. They werent available with T-tops, 350's, and manual transmissions, unless you special ordered and signed a waiver.
My 79 Trans am with the olds 403, had a crease on the roof, between the Ttops.
What you have there is simply a stress crack. Unavoidable unless you use flex additive. This is why it costs $20k to paint a vette.
Hi sameold1,
I believe the reference O52 mentions is enclosed.
Restoring my 1968 Convertible-Voodoo II
As previously mentioned, the factory lead filled that area and due to body flex it event cracked over time. My car has done the same even after being properly OEM prepped before repainting. I did not weld that area like the attached post states so I can’t say if that would remedy the problem.
Looking at 68/69 convertibles entered in the GTOAA concourse class you’ll notice many/ most, if driven, have the hairline cracks you reference.
I believe the reference O52 mentions is enclosed.
Restoring my 1968 Convertible-Voodoo II
As previously mentioned, the factory lead filled that area and due to body flex it event cracked over time. My car has done the same even after being properly OEM prepped before repainting. I did not weld that area like the attached post states so I can’t say if that would remedy the problem.
Looking at 68/69 convertibles entered in the GTOAA concourse class you’ll notice many/ most, if driven, have the hairline cracks you reference.
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Some fixes noted in threads below in addition to the one in post 7. It's not a Pontiac problem. All the GM A body convertibles had the same issue.
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Trunk to window panel on 72 Convertible??
Need to know if my 72 Malibu panel between the trunk and convertible top is supposed to have seams separating the rear quarters to the panel itself. Ours is all sealed up and we have seen on the hardtops they are not filled in. Everyone seems to know, but we have two different answers. Thanks.
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71 Chevelle Convertible Rear Deck Cracks
Recently completed a two and a half year renovation of my 71 Chevelle SS convertible. A week after the car arrived home from the shop a hairline crack became visible on the passenger side rear deck seam. The car had cracks on the rear seams for 40 years before the renovation. I had the lead...
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Rear 1/4's on 70 SS convertible
I am looking at purchasing a 70ss convertible. The owner tells me that it has the original rear quarters. On the top of the 1/4's, below the rear window, where the connect with what I will call the top of the trunk, there is a seam. (where the 1/4 attaches to the trunk) This seam was filled...
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My body bushings, sans the core support, are original.
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133 Posts
47K miles on this car and it's untouched, body bushings, motor and trans rear even ujoints original to car . Core support was rebuilt during paint and body work. Well I will head out to the body shop and see what happens. No cracks before it went to paint at all..
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271 Posts
1st new car I ever ordered was a 84 mustang GT black on black T tops, 1st rain storm filled the dome light till water was pouring into the interior till soaked, shorted out all the interior lights. Took it back to the dealer 5 times and they never got it sealed right, that was just one of the problems with that F ing ford, last one I ever owned.
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6,606 Posts
Those look like they're in the joints between the quarter panel and the filler panel "above" the deck lid. The factory used a flexible seam sealer there and painted over it. That area will flex some, even on a hardtop but more so on a convertible. If whoever painted it tried to "hide" those joints with body filler (which doesn't flex at at), that's probably why they cracked.
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Also, on factory original cars those joints are clearly visible, not hidden. They look like a 'trough" that's been filled with just barely enough sealer to prevent leaks.
The paint job on my car is now 11 years old, and here's how it looks in that area:
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