Fuel Leaks

[Thor RV10]

Anyone have suggestions as to where or how I can efficiently fix or replace the black rubber gasket where my fuel metering is coming from? I wonder how long these gaskets are expected to last. I have pictures I took this morning, but I don't know how to attach it.

Thanks, Thor KAWO, Arlington, Wa

Dues paid 2019
RV10 963TM 820 hrs Hobbs since 09.15.2015

[Northernliving]

Originally Posted by Thor RV10

Anyone have suggestions as to where or how I can efficiently fix or replace the black rubber gasket where my fuel metering is coming from? I wonder how long these gaskets are expected to last. I have pictures I took this morning, but I don't know how to attach it.

Thanks, Thor KAWO, Arlington, Wa

Dues paid 2019
RV10 963TM 820 hrs Hobbs since 09.15.2015

I purchased a 2015 RV8 in 2017, and had to replace the rubber gaskets in April of 2018. I replaced them with cork and some Permatex 80019 Aviation Form-A-Gasket. I've used Permatex 80019 for nearly 40 years on lots of motorcycles(an old Greeves that was a chronic leaker) and cars and it's never let me down. Great stuff. I pumped the tanks out, removed the wing root fairing, removed the sender, cleaned all the pro-seal off the area (being very careful not to get any in the tank) and put it all back together with the cork gasket and a thin film of 80019. Took and evening to do both tanks. Not a drop leaking since.

I'm pretty sure the instructions tell you to throw away the rubber gaskets. Not sure why the builder of my plane used them. If I can find a picture or two, I'll post them.

I used a pump similar to this one.
https://www.amazon.com/Sierra-Tools-...782122&sr=8-11

Edit: Adding photos
==========

[Mel]

Over time the cork will eventually become saturated with fuel and leak again.

The permanent solution is to remove all gaskets, clean thoroughly and reinstall using only pro-seal.

[Northernliving]

Originally Posted by Mel

Over time the cork will eventually become saturated with fuel and leak again.

The permanent solution is to remove all gaskets, clean thoroughly and reinstall using only pro-seal.

Bummer. I thought I read somewhere that cork was the solution and that's what my A&P suggested. Two conditional inspections and everything looked dry. When should I expect them to leak again?

[Kyle Boatright]

Originally Posted by Northernliving

Bummer. I thought I read somewhere that cork was the solution and that's what my A&P suggested. Two conditional inspections and everything looked dry. When should I expect them to leak again?

The next time it leaks, ditch the gaskets (rubber or cork) and just seal things with proseal. It will still removable, and will have a much lower probability of springing a leak.

[Northernliving]

Originally Posted by Kyle Boatright

The next time it leaks, ditch the gaskets (rubber or cork) and just seal things with proseal. It is removable, and has a much lower probability of springing a leak.

Errr. I'll add that to me list of things to expect to do.

Thank.

[Mel]

Originally Posted by Northernliving

Bummer. I thought I read somewhere that cork was the solution and that's what my A&P suggested. Two conditional inspections and everything looked dry. When should I expect them to leak again?

Maximum longevity I've seen for the cork gaskets is around 5-7 years.

[Northernliving]

Originally Posted by Mel

Maximum longevity I've seen for the cork gaskets is around 5-7 years.

Thanks Mel. I'll see what they look like this summer at the conditional inspection inspection and may just replace as a precaution. Best to proseal in the warmer temps unless your work area is heated.

[RandyAB]

Originally Posted by Mel

Over time the cork will eventually become saturated with fuel and leak again.

The permanent solution is to remove all gaskets, clean thoroughly and reinstall using only pro-seal.

So to understand you correctly Mel you recommend ditching the gasket altogether and using a layer of Proseal in its place?

[KayS]

Mel: you suggested proseal instead of permatex. why? i know proseal is absolutley bullet proof but i really don't want to use it.

i installed the naked cork and the rubber gasket on my 7 (which should be very similar to the RV-10) and thinking about to do something before i put in fuel for the first time.

Permantex should work also and would be easier to remove later on for maintanance/modifications etc. or not? Is there anything against the idea to apply permatex #2 on both sides of the cork and rubber gasket?