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08-20-2010, 02:15 PM
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CC Member
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Join Date: Mar 2006
Cobra Make, Engine: Midstates - 390 FE
Posts: 23
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Not Ranked
Separating Two Siliconed Pieces
Hi all. I have a cast expansion tank where the top and bottom are siliconed together and I need to separate the two. The silicone is "super stuck" and I don't want to try driving a wedge between the two for fear of damaging one or the other. I tried heating with a propane torch, but that didn't make a difference. If anybody has any ideas I sure would be grateful.
Drive safe.
Rick
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08-20-2010, 02:37 PM
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CC Member
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Join Date: Oct 2003
Posts: 4,078
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Not Ranked
Go to the paint store and get a wooden-handled, flat blade scraper, 2" wide or less. Sharpen the edge to a knife point on a stone and work it into the seam. Then push it all around the circumference.
It's my favorite gasket tool.
__________________
Chas.
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08-20-2010, 02:52 PM
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CC Member
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Join Date: May 2002
Location: Beaufort,
SC
Cobra Make, Engine: Classic Roadsters '66 427 Replica-SOLD
Posts: 299
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Not Ranked
Quote:
Originally Posted by RLSIDWELL
Hi all. I have a cast expansion tank where the top and bottom are siliconed together and I need to separate the two. The silicone is "super stuck" and I don't want to try driving a wedge between the two for fear of damaging one or the other. I tried heating with a propane torch, but that didn't make a difference. If anybody has any ideas I sure would be grateful.
Drive safe.
Rick
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Rick,
Silicone HATES gasoline......so in a safe place outside just soak it in gas and in will start hollerin' in a matter of minutes........peels off like bad tape!! 
NO SMOKIN' WHILE DOIN' IT!!!  |
08-20-2010, 05:10 PM
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CC Member
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Join Date: Oct 2003
Location: Queen Creek,
AZ
Cobra Make, Engine: Midstates, Vette suspension, Baer 6P brakes, 540 cid Chevy, Haltech Fuel Injection
Posts: 906
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Not Ranked
Try monofilament fishing line and use it like a bandsaw blade to saw the RTV between the parts
__________________
E. Wood
ItBites
10.69 @ 129.83mph - on pump gas and street tires
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08-20-2010, 07:36 PM
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Senior Club Cobra Member
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Join Date: May 2001
Location: Florence,
AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
Posts: 4,511
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Not Ranked
("Try monofilament fishing line and use it like a bandsaw blade to saw the RTV between the parts")
E Wood
string will work, flax or nylon
Dwight
__________________
''Life's tough.....it's even tougher if you're stupid.'' ~ John Wayne
"Happiness Is A Belt-Fed Weapon"
life's goal should be; "to be smarter than inanimate objects"
Last edited by Dwight; 08-20-2010 at 07:38 PM..
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08-20-2010, 08:19 PM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
Quote:
Originally Posted by Dwight
("Try monofilament fishing line and use it like a bandsaw blade to saw the RTV between the parts")
E Wood
string will work, flax or nylon
Dwight
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Even Dental Floss works. |
08-20-2010, 09:08 PM
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CC Member
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Join Date: Jan 2009
Location: Las Vegas,
NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 5,578
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Not Ranked
Quote:
Originally Posted by 392cobra
Even Dental Floss works.
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Dental floss works better than fishing line because it has a texture. Especially the unwaxed stuff. |
08-21-2010, 03:38 AM
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CC Member
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Join Date: May 2002
Location: Beaufort,
SC
Cobra Make, Engine: Classic Roadsters '66 427 Replica-SOLD
Posts: 299
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Not Ranked
You still have to get it off of the two pieces so a petroleum solvent will still have to be used....kerosene might even work but gasoline is very fast!! 
I removed 30 feet of "silicone seam" from the gunwale of my boat with gasoline....piece of cake!!  |
08-21-2010, 05:36 AM
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Senior Club Cobra Member
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Join Date: Jun 2007
Location: Covington,
wa
Cobra Make, Engine: Superformance # 532, 466 BB, 560HP
Posts: 3,027
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Not Ranked
Stick your face between them and Motorboat them. 
Never mind. I was confused there for a minute. 
__________________
John Hall
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08-21-2010, 06:07 AM
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CC Member
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Join Date: Mar 2006
Cobra Make, Engine:
Posts: 277
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Not Ranked
Quote:
Originally Posted by Silverback51
Stick your face between them and Motorboat them.
Never mind. I was confused there for a minute. |
Whew!! Thank you Silverback,
For a minute there I panicked that 392 and the crew had lost there youthful mirth. |
08-21-2010, 08:45 AM
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Club Cobra Member
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Join Date: Nov 1999
Location: Salem,,
NJ
Cobra Make, Engine: ERA 289 FIA #2100 Rio Red Wimbledon White Stripes 302 stroked to 331 Webers Richmond Road Race 5 speed
Posts: 782
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Not Ranked
Soak it in denatured alcohol.
__________________
 Snakebit
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