Author Topic: Grill repair  (Read 1589 times)

Offline mrbill426

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Grill repair
« on: May 01, 2017 - 08:56:56 PM »
My grill needs some attention in the way of fixing a couple cracks, a hole, and putting it back together where one of the headlight surrounds broke off from the main body (ouch!)  :crying:  My question is what kind of "plastic" are they made of?  There are several repair epoxies available and I want to use the correct one.

Thanks
 :working:
MOPAR or NO car!

'72 'Cuda 340, white on white
'72 Sebring; bracket project
'64 Imperial Crown black on black
'66 Imperial Crown; parts car




Offline 1 Wild R/T

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Re: Grill repair
« Reply #1 on: May 01, 2017 - 09:13:09 PM »
Scott Smith posted this years ago... I saved it... He use to work in a plastics injection molding facility & that along with just being a sharp guy.... This is your best option..

Repairing a cracked grill

Start with 100% pure Acetone, buy a gallon. 
Pour an ounce or so into a glass jar (small open mouth jar). Take a scrap grill and using something sharp, scrape off peelings (like pencil shavings size) into the jar of acetone. Put allot of shavings in, the acetone will gradually melt the plastic into a goo. Add enough plastic until the goo reaches toothpaste consistency. Once you have a good batch melted put the lid on the jar tightly and set it aside. Now, prep your grill as normal, V out cracks on both sides, etc. Use clamps near the joint to align the two sides flush and parallel. Smear on some plastic goo, leave it crowned up over the crack like a regular weld looks, let it cure overnight. Sand to flush the next day, fill any pinholes with JB Weld. The crack will practically disappear at this point, paint as normal
JS27N0B 70 Challenger R/T Convertible  FJ5 Sublime, Show Poodle w/90,000 miles since resto
WS27L8G 68 Coronet R/T Convertible  PP1 Bright Red, Project
RM21H9E 69 Road Runner Coupe R4 Performance Red, Sold...
5H21C  65 Falcon 2 dr Wagon... Dog Hauler...

Offline Beekeeper

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Re: Grill repair
« Reply #2 on: May 01, 2017 - 09:45:10 PM »
I like this idea. Just saved it so I can try it out sometime. I have always used fiberglass repair materials (typically short strand fillers) with good success. How does this compare in strength and longevity?

Offline 1 Wild R/T

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Re: Grill repair
« Reply #3 on: May 01, 2017 - 10:40:38 PM »
Your using the same material the grill was originally made from...
JS27N0B 70 Challenger R/T Convertible  FJ5 Sublime, Show Poodle w/90,000 miles since resto
WS27L8G 68 Coronet R/T Convertible  PP1 Bright Red, Project
RM21H9E 69 Road Runner Coupe R4 Performance Red, Sold...
5H21C  65 Falcon 2 dr Wagon... Dog Hauler...

Offline Beekeeper

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Re: Grill repair
« Reply #4 on: May 01, 2017 - 10:59:48 PM »
Doesn't the old material change (degrade) over time as it's exposed to the elements?

Offline jimynick

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Re: Grill repair
« Reply #5 on: May 01, 2017 - 11:14:46 PM »
Look at it more as taking old rusty scrap iron and smelting it. What you end up with, is new product. Same, same, and you're performing the chemical equivalent of fusion welding it. No questions re: compatibility to worry about either.   :cheers:

Offline Beekeeper

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Re: Grill repair
« Reply #6 on: May 02, 2017 - 12:35:32 AM »
I'm gonna try it out. Seems like a clever way to get a better repair.

Offline mrbill426

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Re: Grill repair
« Reply #7 on: May 02, 2017 - 12:55:44 PM »
Sounds pretty interesting.  Now to find a sacrificial grill from that time frame to shave material from.

 :working:


Scott Smith posted this years ago... I saved it... He use to work in a plastics injection molding facility & that along with just being a sharp guy.... This is your best option..

Repairing a cracked grill

Start with 100% pure Acetone, buy a gallon. 
Pour an ounce or so into a glass jar (small open mouth jar). Take a scrap grill and using something sharp, scrape off peelings (like pencil shavings size) into the jar of acetone. Put allot of shavings in, the acetone will gradually melt the plastic into a goo. Add enough plastic until the goo reaches toothpaste consistency. Once you have a good batch melted put the lid on the jar tightly and set it aside. Now, prep your grill as normal, V out cracks on both sides, etc. Use clamps near the joint to align the two sides flush and parallel. Smear on some plastic goo, leave it crowned up over the crack like a regular weld looks, let it cure overnight. Sand to flush the next day, fill any pinholes with JB Weld. The crack will practically disappear at this point, paint as normal
MOPAR or NO car!

'72 'Cuda 340, white on white
'72 Sebring; bracket project
'64 Imperial Crown black on black
'66 Imperial Crown; parts car

Offline 1 Wild R/T

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Re: Grill repair
« Reply #8 on: May 02, 2017 - 02:12:10 PM »
Sounds pretty interesting.  Now to find a sacrificial grill from that time frame to shave material from.

 :working:

Lots of donor Sea Bodies......  :stirpot: :poopoke: :roflsmiley:
JS27N0B 70 Challenger R/T Convertible  FJ5 Sublime, Show Poodle w/90,000 miles since resto
WS27L8G 68 Coronet R/T Convertible  PP1 Bright Red, Project
RM21H9E 69 Road Runner Coupe R4 Performance Red, Sold...
5H21C  65 Falcon 2 dr Wagon... Dog Hauler...

Offline rhamson

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Re: Grill repair
« Reply #9 on: May 02, 2017 - 02:51:28 PM »
Scott Smith posted this years ago... I saved it... He use to work in a plastics injection molding facility & that along with just being a sharp guy.... This is your best option..

Repairing a cracked grill

Start with 100% pure Acetone, buy a gallon. 
Pour an ounce or so into a glass jar (small open mouth jar). Take a scrap grill and using something sharp, scrape off peelings (like pencil shavings size) into the jar of acetone. Put allot of shavings in, the acetone will gradually melt the plastic into a goo. Add enough plastic until the goo reaches toothpaste consistency. Once you have a good batch melted put the lid on the jar tightly and set it aside. Now, prep your grill as normal, V out cracks on both sides, etc. Use clamps near the joint to align the two sides flush and parallel. Smear on some plastic goo, leave it crowned up over the crack like a regular weld looks, let it cure overnight. Sand to flush the next day, fill any pinholes with JB Weld. The crack will practically disappear at this point, paint as normal

 :iagree: It really works. I also straightened out a warped bottom section of the grille insert by applying a thicker layer over the warp that I flattened into position straight. After the goo dried the bottom of the grille remained flat.