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Stress Cracks

Kid_Again

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Jul 6, 2004
Messages
1,171
Location
NJ - Which exit you from?
Corvette
65 SB Roadster, 66 BB Coupe
Not surprisingly, stress cracks are appearing around the gills. Any advice on the best way to repair these?

Thanks
 

IH2LOSE

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May 24, 2001
Messages
3,908
Location
We Will All Meet Again
Corvette
1966,and a 1962 thats almost complete
I was told by some one that drilling the end of the crack does nothing.

What I know about fiberglass

Is grind it in a "V"

lay some resin on the repair

Soak some mat in resins then place on the repair then roll the resin back out of the matt

Each layer of matt gets a little wider then the previous one.

And the less resen left in the repair the stornger the repair will be

I had allot of fun repairing cracks,smoothing the firewall and building the hood on my 62

If you take you time you can pretty much make the repair out of mat and resin and bairley need any plastic work.

If they are not too bad I would let them bee
 

jjmish

Active member
Joined
Jul 18, 2005
Messages
38
Location
central nj
Corvette
57, 61, 63
gills on the 65/66?

Any major work previously performed in that area?
If not, grind a trough along the crack with a dremel or die grinder if your real good. Just go deep enough to eliminate the crack as tested with lacquer thinner. Broaden the trough about an inch maximum, and taper in to crack.

Get west systems epoxy with the slow hardener, add some thickener which West system also sells and cut up some fiberglass matt with scissors. Fold the matt over itself before cutting and you want to end up with shreds of fiberglass. Mix the resin/hardener, thickener and shredded matt, apply into trough. Work well with a putty knife or popcicle stick to get all the air out.

Ecklers always talked about layering fiberglass matt on a repair, which is correct in general, especially over a bonding strip, but panels are only so thick and you will find one layer goes a long way to fill up any grounded out repair trough. Auto body shops always wanted to drill holes in corvettes to stop cracks but was more feel good theory than useful.

New GM fiberglass always had these type of cracks at the corners and along some edges requiring this type of repair. Seems more in the resin than anything structural. Sad to see cracks after spending all those $$ on paint, many can live with it as they do with wrinkled skin or aktinic keratosis.

joe,
Neshanic

West systems epoxy saturates deeper than polyester resin and the cans have pumps so you can't screw up the mixture. Nothing wrong with typical fiberglass polyestrer resin if you decide to use that. Caution is the right mix of hardener to resin as you can end up with a brittle repair.
 

Kid_Again

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Messages
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Location
NJ - Which exit you from?
Corvette
65 SB Roadster, 66 BB Coupe
Bunch of useful information, thanks!

To my knowledge, there have been no repairs in the area of the gills.

:m
 

4WDVETTE

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Joined
Oct 1, 2004
Messages
201
Location
Waterford, NJ
Corvette
1966 Coupe
Joe - also agree with the grind the 'V' method. I had several similar cracks to deal with and resin and mat are the way to go. I have had no significant issues since the paint job with the cracks. Maybe the tire ripping part of the fender but, no problems with the cracks.

Steve
 

Viet Nam Vett

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May 28, 2004
Messages
2,410
Location
Egg Harbor Township NJ
Corvette
65 BB 502 Cp /MSD ATOMIC EFI/ 2009-HUMMER H2
I think what's needed here is a Night out on the town. A few drinks...a few Kuba Kuba's..(Cigars) .. and maybe a trip to the strip bar where a few well placed dollar bills will get the fiber glass cracks a hot LAP DANCE.

This will do wonders for the stress ..:D
 

Kid_Again

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Messages
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Location
NJ - Which exit you from?
Corvette
65 SB Roadster, 66 BB Coupe
OH YEAH!!! forgot to mention that the stress cracks around the gills were MINE, not the car's....buncha' useful information anyway!

thanks :m
 

maxphunn

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Joined
Feb 28, 2004
Messages
148
Location
Ontario, Canada
Corvette
Red '59, Silver '66 convertible
After a repair, won't the same area crack again?

Is it possible to find why it is starting to crack and then shim the body to lessen the stress in that area?
 

Kid_Again

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Messages
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Location
NJ - Which exit you from?
Corvette
65 SB Roadster, 66 BB Coupe
probably correct...just fixing the symptoms may not cure the disease...really depends on how energetic i become and right now i'm pulling the trans because i don't like the way it's shifting 3/4...it will be a LONG winter
 

jjmish

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Jul 18, 2005
Messages
38
Location
central nj
Corvette
57, 61, 63
Realize the center grill bars are essentially flapping in the breeze. do that enough and you get cracks.

I'm trying to get up the energy to pull my trans to put in the dated original. Justified, because it's a hobby and that's what you do with a hobby.

Corvette season ends with the start of bowseason, picks up again after spring fishing.
 

bossvette

Gone but not forgotten
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May 19, 2003
Messages
3,233
Location
West Unity Ohio
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1968 1997
.

Corvette season ends with the start of bowseason, picks up again after spring fishing.

thats the only thing I miss about NJ the abundance of Bambi to hunt and the spring Trout fishing on the south branch ;)
 

Viet Nam Vett

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Messages
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Location
Egg Harbor Township NJ
Corvette
65 BB 502 Cp /MSD ATOMIC EFI/ 2009-HUMMER H2
thats the only thing I miss about NJ the abundance of Bambi to hunt and the spring Trout fishing on the south branch ;)


Can't believe there are no Bambi's runnen around your Big Sky Spread..
Plus.....you got that big fishen hole right out side your door.

Just stock it up with some trout...:D

Heh.. How far is Akron from you..??
 

bossvette

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Messages
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Location
West Unity Ohio
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1968 1997
Can't believe there are no Bambi's runnen around your Big Sky Spread..
Plus.....you got that big fishen hole right out side your door.

Just stock it up with some trout...:D

Heh.. How far is Akron from you..??


trout need cold clean water not much of that in this part of Ohio, just a lot of silt :L

Akron is on the other side of Ohio south of Cleveland roughly 200 miles give or take a few

Bambi has been avoiding me quite well this year :eyerole last day of gun I had my gun up and ready to shoot when he came around the big tree, instead of continuing the way he was headed he poked his head around spotted me and took off like a BOOH :cry
 

Viet Nam Vett

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65 BB 502 Cp /MSD ATOMIC EFI/ 2009-HUMMER H2
Akron is on the other side of Ohio south of Cleveland roughly 200 miles give or take a few

The reason being ..if all chips fall in place in the next few hours and or days ..I might be flying into AKRON area..(Beachwood OH) to pick up my Hummer.

Just sitting back waiting for a call now...:D
 

bossvette

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Messages
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1968 1997
The reason being ..if all chips fall in place in the next few hours and or days ..I might be flying into AKRON area..(Beachwood OH) to pick up my Hummer.

Just sitting back waiting for a call now...:D
Cool, you will probably fly into Cleveland unless you are going by Piper Cub or Crop Duster. I thought you may be going to Summit Racing, I have always wanted to stop in there.
I can usually be in Cleveland in 2.5 hours if smoky isn't too heavy on the TPK
The ground is still bare around here, but I don't know about further East along the lake. Well if you are in Ohio and have time to kill let us know Santa is being good to you this year I take it. :L
 

Viet Nam Vett

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Joined
May 28, 2004
Messages
2,410
Location
Egg Harbor Township NJ
Corvette
65 BB 502 Cp /MSD ATOMIC EFI/ 2009-HUMMER H2
Cool, you will probably fly into Cleveland unless you are going by Piper Cub or Crop Duster. I thought you may be going to Summit Racing, I have always wanted to stop in there.
I can usually be in Cleveland in 2.5 hours if smoky isn't too heavy on the TPK
The ground is still bare around here, but I don't know about further East along the lake. Well if you are in Ohio and have time to kill let us know Santa is being good to you this year I take it. :L

Still waiting to hear.:cool
 

Kid_Again

Well-known member
Joined
Jul 6, 2004
Messages
1,171
Location
NJ - Which exit you from?
Corvette
65 SB Roadster, 66 BB Coupe
Realize the center grill bars are essentially flapping in the breeze. do that enough and you get cracks.

I'm trying to get up the energy to pull my trans to put in the dated original. Justified, because it's a hobby and that's what you do with a hobby.

Corvette season ends with the start of bowseason, picks up again after spring fishing.


Definition of a "hobby" - a money losing endeavor
 

Kid_Again

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Messages
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Location
NJ - Which exit you from?
Corvette
65 SB Roadster, 66 BB Coupe
Hey Mark, good luck on the Hummer!!!!!

Bambi? I got lots of bambi's in Hopewell. LOTS of hunters also. My neighbor literally shoots deer off his back porch, away from the houses but it rattles my windows. I swear he's using a 10ga. I feel like I live next to the Unabomber.

Uh, sorry, he shoots over the hood of his midyear...I needed to make that clear.;)
 

bossvette

Gone but not forgotten
Joined
May 19, 2003
Messages
3,233
Location
West Unity Ohio
Corvette
1968 1997
Definition of a "hobby" - a money losing endeavor

everything I do is a hobby then :L

Hopefully all those midyears in Hopewell steer clear of Bambi, I took this picture on Carter Road last year when I took one of the relatives for a ride in my Vette
hopewelldeer.jpg
 

jjmish

Active member
Joined
Jul 18, 2005
Messages
38
Location
central nj
Corvette
57, 61, 63
Looking for the photo taken from the old 62 with the top down, going down Province-line Rd 'hill', toward Cherry Valley rd in Hopewell by Gantz's farm.
 

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