How to stop my rear hole from sagging (with pics!)

Darth Menace

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Now that I have everyone's attention, I was wondering how to fix this. (the picture makes it look worse then it is, but I still want to straighten it up)

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7TH_SIGN

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Mod the engine to the point where you need a parachute to slow the car down. Run parachute through hole. That will stop people from picking on your sagging hole.
 
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Darth Menace

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On a more serious note my rear exhaust opening aka hole is fine. So is my friends holes that I have checked. Your hole is definitely isn't right.:dunno:
shoot...earlier last summer i ran a couple days with no tips....maybe the heat did that. I was thinking of heating it up again and seeing if it would push bank into place
 

EllowViper

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That does look like a Corvette (OR TWO) had its way with your car.... Speedracer has the best ideas so far as far as a permanent fix goes. Thankfully, my rear grommet still looks like a ******.
 

dave6666

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I looked up the melting point of generic polyurethane and it's about 230 - 250C. It would be tough to find the exact temp that it would take to reform that but it would be more than ambient and less than the melting point. My suggestion would be to thermoform it back to shape using 2 sturdy metal strips, one on each side clamped with some small locking pliers or some rod hanging beam clamps (industrial hardware), and drive the car to get everything hot. Then when it is cool pull the strips off. You'll never get that back to flat without heating and molding it.
 
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Darth Menace

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Ya, that's what I was thinking of. I want to get this done before the driving season so that's why I asked if there is a common thing to do. I think I will try the heatgun considering it gets that hot too. Wish me luck on not warping paint :(

thanks for the helpguys
 

Fatboy 18

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Question, Do you intend to still use the rear exit exhaust system?

If so you can buy the Autoform 4 blade rear Diffuser, you can order with the hole cut out for the rear exhaust or have it left blank for side exit exhausts.

The diffuser hooks over the rear bumper and is supported by using the same bolt holes that the rear bumper uses.

My rear exit Bellenger system has also caused that hole to crack and the plastic has become brittle due to excessive heat.
 

Bobpantax

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The photo does not show up for me but when I had my Gen II I made very sure that the exhaust was properly centered within the opening to avoid any heat damage since I was running hi flow cats with a Roe supercharger and the heat was higher than that emitted by a stock vehicle. As for fixing it, Dave is the site guru on many body related fixes/improvements concerning the Gen II. In fact if you do a search, you will find some of his threads which show exceptional creativity and superb workmanship. Even if you do not wish to do any of them, it is very interesting to read them.
 

vancouver-gts

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Make up a rectangle frame from sheet of aluminum 3/16 thickness to conform the shape of the opening, clamp it to the plastic with four or more small clampss in the opening. Use a heat gun on the backside only! The aluminum dissipates heat quickly avoiding the paint getting damaged from the heat. Use a rag soaked in cold water cooling the plastic while you working at it. I did quite few plastic bumper repairs like that without damaging the exterior/paint of the bumper.Other solution I'd do is making a nice polished s/s frame on the outside with a frame in back, sandwiching the plastic.
 

Red Snake

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My car has a metal trim insert on it. But I am not sure who makes it. It was on the car when I bought it.
 

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