Petcock Stainless Steel Screws

[tas850g]

I am tryhing to replace my original screws that hold the fuel petcock on with stainless steel allen head screws. I have a nice new petcock and would like to go with SS 6mm screws but since filling my tank with fuel i am getting a slow drip from around the screw head. I have SS washer fitted for a 6mm screw that uses a 5mm allen wrench.

Do I need a flange head screw for more distributed pressure to create a better seal? I would like to stay SS Allen head if possible.

Thanks!

[Agemax]

I am tryhing to replace my original screws that hold the fuel petcock on with stainless steel allen head screws. I have a nice new petcock and would like to go with SS 6mm screws but since filling my tank with fuel i am getting a slow drip from around the screw head. I have SS washer fitted for a 6mm screw that uses a 5mm allen wrench.

Do I need a flange head screw for more distributed pressure to create a better seal? I would like to stay SS Allen head if possible.

Thanks!

try some thread sealer or PTFE tape on the threads, any petrol resistant sealer will work

[twr1776]

I am pretty sure that # 6 is the OEM washer and if it is like mine it has a little rubber seal on the inside of it by the threads for sealing. Did your replace it with a regular type washer or re-use it?

http://www.flatoutmotorcycles.com/fiche_section_detail.asp

[knotzilla]

You have to apply fuel resistant sealer around the threads of the screws. Ted

[tas850g]

i replaced the washer with a new SS washer, no internal rubber ring on the washer. I have the original washers but i think they too do not have a rubber ring.

I was thinking about finding any washer with an internal rubber ring. I will ook to see what i find at the hardware store for washers.

[almarconi]

The kind of washer you are looking for is a sealing washer.

They look like this..

[tas850g]

good visual, i'll do some searching. Thanks for the help!

[bwringer]

Just use a 1/4" nylon washer from any hardware store.

It's worked on my bike for ten years or so...

[tas850g]

i'm a little skeptical b/c the fuel is coming from the allen head but i suppose if the washer is a tight fit to the head and the shaft of the screw then it could work. I'll try the sealing washer and the nylon washer.

Thanks for the suggestions!

[almarconi]

Don't forget to use some thread sealant.

[tas850g]

It's on my list. Off to the hardware store in the morning.

[tas850g]

i just bought 2 neoprene washers with an inside diameter of 3/16" and kind of threaded it onto the stainless steel 6mm screw with a SS washer. The i.d. was a bit smaller than the 6mm screw shaft. Applied some thread sealant and tightened down the 2 screws. Filled the tank with fuel and after an hour no leaks around the allen head. Had to be careful how much i torqued down the screw b/c the pressure from the allen head and washer was squishing the neoprene washer. I could have gone tighter but didn't. Will monitor my work to see if this will hold up.

Thanks for the tips!