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imported_petes66 · 05-19-2008, 07:25 PM

Hey guys, I broke the tank on my tmaxx. Is there a way to patch a fuel tank? Its a small crack about 1/2" long. Thanks

Peter

Dave Henry · 05-19-2008, 07:27 PM

easy, just melt the crack toogether with a solderring iron, there are no glues i have ever found that work

Narly1 · 05-19-2008, 08:09 PM

Hey Dave, I wonder if fibreglass cloth and resin would do the job? I've heard of being used on 1:1 scale tanks....

Narly1

Dave Henry · 05-19-2008, 08:11 PM

full scale tanks are made of different materials, tanks for glow models are made of a special plastic that is resistant to our fuels/crashes etc, even the manufacturers have not found a glue that works, they sonicly weld them toogether (sounds waves), the resin won't stick to the tank for long unfortunately

Narly1 · 05-19-2008, 08:24 PM

Interesting. One of my customers makes machines for "welding" filler necks, etc into automotive gas tanks. They use a different process. They actually butt the necks up against the tank under force and then spin them. The friction heats up the surfaces of the 2 pieces and they end up bonded together.....

Narly1

Dave Henry · 05-19-2008, 08:31 PM

yep, same result as sonic welding i think, the sound waves heat up the parts at the joint and melt them toogether, no glue

tried many glues in the past, both adhesives (ca,epoxy etc) and solvent types (abs,model cement,resin bond etc) and none of them lasted at all, some fell off way to easy, even on clean new tanks, forget about it on used tanks that have an oily residue in the plastic

but the solderring iron trick works almost every time

imported_offroaders · 05-19-2008, 08:38 PM

i have used JB weld

Dave Henry · 05-19-2008, 08:41 PM

havn't tried that one, have you tried picking it off with your fingers? also have you tried a leak test under water to see if it totally sealed the tank, would be cool if it works

imported_offroaders · 05-20-2008, 08:40 AM

no leak test but it feels tight on the tank

imported_BBFBCAP · 05-20-2008, 09:19 AM

100% PERFECT SOLUTION...AND CHEAP!!!

Go to the dollar store and buy some epoxy. Mix it up...slap it on...BINGO!!!

I always take some with me to the track when I race, JUST for this reason.

Trust me, it works great!!!

05-19-2008, 07:25 PM	#1
imported_petes66 RCC Contributor Join Date: Mar 2007 Feedback: 0 / 0% Posts: 329 Total Props: 0	Fixing fuel tanks? Remove this ad - become a site supporter! Hey guys, I broke the tank on my tmaxx. Is there a way to patch a fuel tank? Its a small crack about 1/2" long. Thanks Peter __________________ Team Associated RC18R Team Associated RC18B Team Associated RC18MT HPI E-Savage HPI Firestorm HPI Nitro RS4 3ss HPI Savage X HPI Savage XL Traxxas T-Maxx 3.3 Traxxas E-Maxx 16.8 2 JR XS3 Pro
	.

05-19-2008, 07:27 PM	#2
Dave Henry Sprucewood Team Losi Racing - Team Captain Join Date: Aug 2004 Feedback: 0 / 0% Posts: 1,792 Total Props: 0	easy, just melt the crack toogether with a solderring iron, there are no glues i have ever found that work __________________ TLR, Horizon Hobby,Spektrum,Pinnacle Hobby,Dynamite,CRC,Nitrotec Engines,Michael Lambert Photography special thanks to Mac for all your help over the years!
	.

05-19-2008, 08:11 PM	#4
Dave Henry Sprucewood Team Losi Racing - Team Captain Join Date: Aug 2004 Feedback: 0 / 0% Posts: 1,792 Total Props: 0	full scale tanks are made of different materials, tanks for glow models are made of a special plastic that is resistant to our fuels/crashes etc, even the manufacturers have not found a glue that works, they sonicly weld them toogether (sounds waves), the resin won't stick to the tank for long unfortunately __________________ TLR, Horizon Hobby,Spektrum,Pinnacle Hobby,Dynamite,CRC,Nitrotec Engines,Michael Lambert Photography special thanks to Mac for all your help over the years!
	.

05-19-2008, 08:31 PM	#6
Dave Henry Sprucewood Team Losi Racing - Team Captain Join Date: Aug 2004 Feedback: 0 / 0% Posts: 1,792 Total Props: 0	yep, same result as sonic welding i think, the sound waves heat up the parts at the joint and melt them toogether, no glue tried many glues in the past, both adhesives (ca,epoxy etc) and solvent types (abs,model cement,resin bond etc) and none of them lasted at all, some fell off way to easy, even on clean new tanks, forget about it on used tanks that have an oily residue in the plastic but the solderring iron trick works almost every time __________________ TLR, Horizon Hobby,Spektrum,Pinnacle Hobby,Dynamite,CRC,Nitrotec Engines,Michael Lambert Photography special thanks to Mac for all your help over the years!
	.

05-19-2008, 08:41 PM	#8
Dave Henry Sprucewood Team Losi Racing - Team Captain Join Date: Aug 2004 Feedback: 0 / 0% Posts: 1,792 Total Props: 0	havn't tried that one, have you tried picking it off with your fingers? also have you tried a leak test under water to see if it totally sealed the tank, would be cool if it works __________________ TLR, Horizon Hobby,Spektrum,Pinnacle Hobby,Dynamite,CRC,Nitrotec Engines,Michael Lambert Photography special thanks to Mac for all your help over the years!
	.

05-19-2008, 08:09 PM	#3
Narly1 RCC Pro Contributor I am: Earl A. Join Date: Jun 2006 Location: Erin, Ontario Feedback: 6 / 100% Posts: 1,699 Total Props: 3	Hey Dave, I wonder if fibreglass cloth and resin would do the job? I've heard of being used on 1:1 scale tanks.... Narly1
	.

05-19-2008, 08:24 PM	#5
Narly1 RCC Pro Contributor I am: Earl A. Join Date: Jun 2006 Location: Erin, Ontario Feedback: 6 / 100% Posts: 1,699 Total Props: 3	Interesting. One of my customers makes machines for "welding" filler necks, etc into automotive gas tanks. They use a different process. They actually butt the necks up against the tank under force and then spin them. The friction heats up the surfaces of the 2 pieces and they end up bonded together..... Narly1
	.

05-19-2008, 08:38 PM	#7
imported_offroaders RCC Pro Contributor Join Date: Nov 2005 Feedback: 0 / 0% Posts: 1,675 Total Props: 0	i have used JB weld
	.

05-20-2008, 08:40 AM	#9
imported_offroaders RCC Pro Contributor Join Date: Nov 2005 Feedback: 0 / 0% Posts: 1,675 Total Props: 0	no leak test but it feels tight on the tank
	.

05-20-2008, 09:19 AM	#10
imported_BBFBCAP RCC Supreme Contributor Join Date: Jan 2008 Feedback: 0 / 0% Posts: 2,684 Total Props: 0	100% PERFECT SOLUTION...AND CHEAP!!! Go to the dollar store and buy some epoxy. Mix it up...slap it on...BINGO!!! I always take some with me to the track when I race, JUST for this reason. Trust me, it works great!!!
	.

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