Fuel Tank Help

Bushwacker · #1 02-01-2010, 02:20 PM

Gas odor in the cabin of my Seafari is absolutely unacceptable when I sleep aboard, so I'm pretty fanatical about sealing the fuel tank! The old Permatex Non-hardening No. 2A Form-A-Gasket is a little messy but it works well; put some on both sides of gasket and on screw threads. (wear vinyl gloves if you don't want it on your fingers for a couple of weeks!) Don't use any type of RTV or anything with silicone in it, as it's not compatible with gasoline.

Fr. Frank · #2 02-01-2010, 03:34 PM

Quote:

Don't use any type of RTV or anything with silicone in it, as it's not compatible with gasoline.

Absolutely right! Permatex 2A is the way to go. However, I would use Permatex #12020, Instant Gas Tank Repair between the gasket and the tank if you have any pitting under the gasket.

#3 02-01-2010, 07:48 PM

Quote:

Don't use any type of RTV or anything with silicone in it, as it's not compatible with gasoline.

Absolutely right! Permatex 2A is the way to go. However, I would use Permatex #12020, Instant Gas Tank Repair between the gasket and the tank if you have any pitting under the gasket.

I went with the Permatex 2A. The pictures look like pitting, but it is just crud. I cleaned it off and it is now back together. I have the tongue of the trailer down so the fuel is away from the port. I'm letting it cure overnight and I'll be checking to see that it does not leak in the morning. Thanks guys!!

3rdday · #4 02-03-2010, 11:13 PM

Silicone will swell with oil and fuel, unless it is a Flourosilicone, whick you wont find. it is sold as gum stock to injection molders, use as o ring material and fuel hose liner in aerospace and automotive.
Also a big mis understanding- silicone is a terrible adhesive unless used on glass. for this application you need an adhesive and sealant.Good choice on the permatex.
Also never use silicone to seal holes- use a polyurethane such as 3m 5200 UV or Sika, Bostic etc

Wags23 · #5 02-04-2010, 01:23 PM

The builder of my tank in mass used silicone on the sending unit so he could get apressure reading.It turned in to a nightmare clogged my fuel system. Ended up having to replace fuel reg and fuel pump. I did all the labor and trouble shooting still waiting to be reimbursed for just my parts.