K11 Owners Group

idratherbehawking · Joined: 20 Mar 2010 Posts: 4 Location: Tulsa, OK

I have a tank that is leaking a little bit from the right rear weld for the tab. Took it to a welder and said he could not weld it with out repainting it. I got a sealing kit and it says that BMW has a lining in it and I can not use it without removing the lining, but does not tell me how. Any help or suggestions would be appreciated.
Mark

carp · Posted: Sun May 23, 2010 2:44 pm Post subject:

Had the same situation with my k75 rear left tab got bent and started leaking. Took it to excellent welder who said he thought I should try special epoxy for gas tank repairs. Found an "instant gas tank repair" two part epoxy at O reilly. Just repaired it a month ago and so far, no more leak.
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93 K1100LT
07 Bandit 1250S

Jim · Posted: Sun May 23, 2010 6:17 pm Post subject:

If you want to attempt it yourself: http://www.por15.com/Fuel-System-Restoration/products/12/

As far as I know, BMW did not line the tanks. A previous owner may have lined yours.

If you don't want to tackle the repair yourself, you can send it to Eppa Wimbish Aylett, VA (804)769.2324. Contact him first and make sure it's well packed for shipping.
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Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

idratherbehawking · Joined: 20 Mar 2010 Posts: 4 Location: Tulsa, OK

Thanks for the input I found the leak on both sides Have a friend that is an aviation welder said he could do it without hurting the paint. Keep your fingers crossed.

idratherbehawking · Joined: 20 Mar 2010 Posts: 4 Location: Tulsa, OK

Still no luck. There is a coating on the inside of the tank. I even got a sealing kit and it said that there is a coating and not to use the product. The welder said that the coating is compromising the weld. He is going to try it again on Tuesday. Hope it works this time. I am ready to ride again.

Jim · Posted: Sun May 30, 2010 10:15 pm Post subject: leaking gas tank

If you don't want to tackle the repair yourself, you can send it to Eppa Wimbish, Aylett, VA (804)769.2324. Contact him first and make sure it's well packed for shipping.
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Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

Flying Duck · Posted: Sun May 30, 2010 10:20 pm Post subject:

I used some liquid steel or whatever type two part epoxy-ish stuff. I've heard JB Weld works as well. Mine was down under the fuel pump so it was a biatch to get the stuff in there - even with long skinny fingers - but it seems to be holding up well.

I don't think BMW lines the tanks. I've cleaned out a few crappy tanks and have seen no evidence of a lining. Besides, if the tank were lined then how could water cause the aluminum to corrode? It would have to make it through the liner first and then the aluminum - which would mean it's a pretty crappy liner, huh?

Just my .02. YMMV.
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
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hfxrzw · Mad Brick Rider Joined: 30 Jan 2009 Posts: 78

I have used JBweld to good effect. Repaired my tank 3 years ago and still going strong. The tank that is Laughing

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Cheers, Rene

Greetings from Florida.

BMW K100 '85