Sealant, petrol proof, fuel tap leak
Discussion
Looking for something to hopefully stop my cbr600 fuel tap leaking.
It's from the flange fitting, 22mm nut that compresses a ring in-between the tank and the tap.
I've replaced the oe oring with a new oe spec one, I've fitted a new tap with a new oring.
Current thinking is a type of fuel proof sealant as a backup to the oring(1.3mm cross section)
It's from the flange fitting, 22mm nut that compresses a ring in-between the tank and the tap.
I've replaced the oe oring with a new oe spec one, I've fitted a new tap with a new oring.
Current thinking is a type of fuel proof sealant as a backup to the oring(1.3mm cross section)
Car Mechanics Feb 2026 has a 10-page article on various sealants / thread locks etc.. BondLoc white label WL77 is stated to be ethanol, unleaded etc. suitable up to 150 degrees; BondLoc B572 thread sealer is petrol resistant (ethanol not mentioned); Loctite 5400 for metal threads,fuel resistant.
Not used any of them.
Not sure about impact on O-rings, so a bit of research might be needed.
Not used any of them.
Not sure about impact on O-rings, so a bit of research might be needed.
Yesterday I took my two different sealants and hopefully fixed the tap.
The flange fitting tank to tap was treated to Permashield Fuel Resistant Gasket Dressing and Flange Sealant 85420
I removed the original oring and placed a smear of the stuff on the mating face and thread, then put the oring back and added a bit more
Then i put some on the tap mating face and left it for 10 or so mins.
The tap is a vacuum type meant for a 1997-98 blade, the Cbr is only off or on, I'd taken the tap to bits and removed the vacuum bit and put the seals back in, this now leaked where the vacuum bit bolts on.
I'd bought JB weld tank sealer epoxy stuff as it's fuel resistanant, I removed the original seal and used a small sausage of the jb weld stuff in the groove meant for the original seal.
Just had a open the window and sniff for petrol test no smell.... unless it's all leaked out.
And ....I did this on Friday, it's Sunday today.
I've been to work twice, about 60 miles, no damp patch under the bike, no fuel smell whilst riding.
I've bought a spare tank with the original tap still fitted, I'll probably swap them over and keep the modified one as a spare
The flange fitting tank to tap was treated to Permashield Fuel Resistant Gasket Dressing and Flange Sealant 85420
I removed the original oring and placed a smear of the stuff on the mating face and thread, then put the oring back and added a bit more
Then i put some on the tap mating face and left it for 10 or so mins.
The tap is a vacuum type meant for a 1997-98 blade, the Cbr is only off or on, I'd taken the tap to bits and removed the vacuum bit and put the seals back in, this now leaked where the vacuum bit bolts on.
I'd bought JB weld tank sealer epoxy stuff as it's fuel resistanant, I removed the original seal and used a small sausage of the jb weld stuff in the groove meant for the original seal.
Just had a open the window and sniff for petrol test no smell.... unless it's all leaked out.
And ....I did this on Friday, it's Sunday today.
I've been to work twice, about 60 miles, no damp patch under the bike, no fuel smell whilst riding.
I've bought a spare tank with the original tap still fitted, I'll probably swap them over and keep the modified one as a spare
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