Fuel Line Leak

[RobotMan 264]

I have a small drip leak at the connection going into the fuel pump. It is a stainless steel threaded connection with a flared end on tube. I have it overly tight at this point. Any tricks or ideas to seal this joint? Thanks for chiming in.

 

Rick

[Grabber70Mach 107]

If your leak is coming from the threads where the fitting screws into the pump I would try using pipe dope. Possibly something like this:

http://www.homedepot.com/p/Oatey-8-oz-Pipe-Joint-Compound-154202/100204007

[Mach1 Driver 560]

Perhaps these will help, go to: http://www.jefflilly.com/fabrication/fuel-brake-lines/

Scroll down to #33 and 34

They are copper gaskets that go between the fitting and flare and work well on stainless.

[barnett468 418]

From the link by Mach 1 Driver

 

[RobotMan 264]

Thanks guys!!! Do you know where to buy them? Are they typically available at local auto parts store?

[1969_Mach1 333]

I've had that issue many times at the inverted flare fittings on Holley carbs.  Small leaks past the flare not the threads.  At least with mine, the flares looked fine and it turned out there was so much friction within the thread engagement the fittings were not tight enough.  I put a small film of Teflon paste on the threads and the leaks stopped.  Auto parts stores have Teflon paste that is more suited for automotive use than the Teflon paste from home improvement stores.  I've used both successfully but the automotive stuff seems to lubricate better and be more suitable for threads on fuel fittings.

 

I've never seen those copper washers.  I like them..

[Brian Conway 264]

I suggest you loosen and tighten the fitting more than several times.  Keep track of where the nut stops after each tightening.  I think you will see that the fitting is traveling further with each re-tightening.  Stainless steel brake and fuel lines are notorious for not seating on the first try.  I like the looks of those copper seats to.  Brian

[Mach1 Driver 560]

Thanks guys!!! Do you know where to buy them? Are they typically available at local auto parts store?

Google: copper gaskets for flare fittings

[RobotMan 264]

I bought a 5/16" dia copper flare gasket from a refrigeration supply house and it worked like a charm!!! The fuel line is not leaking anymore!!! Thanks again to the guys on this forum with so much knowledge and experience.