C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

cracked side Louvers

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Old Jan 8, 2007 | 10:48 AM
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Default cracked side Louvers

Is this a common problem withr C4's? Both louvers on my 93 are cracked up at the top where it bolts in. Does anyone have a fix for this? I'd like to order a new set, have them painted and installed but in such a way where this won't happen again. Perhaps rubber bushings to let the louver float. I also noticed that the crack seperates slightly further when on a 2 post lift. I was told to leave the hood open when on a lift but I nver thoguht these cars flex that much.
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Old Jan 8, 2007 | 11:40 AM
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Originally Posted by sonomacrew01
Is this a common problem withr C4's? Both louvers on my 93 are cracked up at the top where it bolts in. Does anyone have a fix for this? I'd like to order a new set, have them painted and installed but in such a way where this won't happen again. Perhaps rubber bushings to let the louver float. I also noticed that the crack seperates slightly further when on a 2 post lift. I was told to leave the hood open when on a lift but I nver thoguht these cars flex that much.
Love to see some pics of this problem.
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Old Jan 8, 2007 | 04:19 PM
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Originally Posted by sonomacrew01
Is this a common problem withr C4's?
No.
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Old Jan 8, 2007 | 05:16 PM
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Here's what I am talking about.



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Old Jan 8, 2007 | 05:23 PM
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One of mine is cracked.
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Old Jan 8, 2007 | 06:45 PM
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It looks so minor I think it can be repaired and repainted.
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Old Jan 8, 2007 | 06:50 PM
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I'm just wondering if the bolt is too tight..?
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Old Jan 8, 2007 | 06:57 PM
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Very common on the "plastic" 91-6 covers I think it's more bad material than improper mounting. Alot of people probably have the problem, just haven't noticed it yet. Eventually it will crack down past the molding mark.

Last edited by zr1fred; Jan 8, 2007 at 07:01 PM.
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Old Jan 8, 2007 | 07:01 PM
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Is it worth having repaired or to buy new ones?
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Old Jan 8, 2007 | 07:09 PM
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I'd buy new, if you're keeping. Damage down on the side can be fixed fairly easy, but up there where the rivet is, just cracks again.
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Old Jan 8, 2007 | 09:07 PM
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If you repair or replace them try putting a neoprene washer on the bolt and don't tighten too much.
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Old Jan 8, 2007 | 09:15 PM
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May not be common to break, but 2 things come to mind: first, the roadster is, of course, a bit more flexible than even the coupes with roof panel removed.

And second, my new-in-'93 side gill cracked the day after I bought it with the roof unremoved.

Dealer replaced, naturally, for free. It could be a good idea to allow more room for it to move around a bit, rather than tightening them down.
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Old Jan 9, 2007 | 12:18 PM
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Originally Posted by LT4CompYell
May not be common to break, but 2 things come to mind: first, the roadster is, of course, a bit more flexible than even the coupes with roof panel removed.
Actually the roadster is much stiffer than a coupe with the top out. Unless the coupe in question has added the equivalent of the X-brace.
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