question about fuel petcocks

[Michael Cecchini]

Rolls Royce developed Hylomar Blue for it's aircraft engines and fuel systems in the early 80's
Hylomar Blue sealant is still today approved & used with fuel systems.   

Bob's BMW, San Jose BMW, Beemer Shop......all have been using Hylomar Blue where gas sealing is needed for 30+ yrs.  All of them recommend & sell Hylomar because it's a proven product & works so well.

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From: Tom Cutter 

Very first lesson I learned in motorcycle mechanic stuff: never use sealants anywhere in a fuel system.

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Michael Cecchini  wrote:



Do realize that the original fiber washers sealed much easier with less nut torque vs alloy washers.  

I don't use the alloy sealing washers that come with petcocks.  I use fiber washers from Harbor Freight or Amazon with a thin smear of Hylomar Blue sealant on both sides of the fiber washer.  Seals like butter. 

Do make sure all the petcock threads are clean (brass toothbrush works well) and wiped with some wheel bearing grease for ease of operation and anti-rust properties. 

I'm still using the same fiber washers from 10 yrs ago because they don't become deformed with such little torque on the sealing nut and Hylomar stays soft and seals time and time again. 

600 pc fiber washer kit will last you decades for all kinds of uses.... $16..

https://tinyurl.com/mkzz2vew







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