Filling the tanks creates some pressure. I would use the teflon thread sealant and allow it to cure before putting pressure on it.
Why Does My Car Have A Transmission Fluid Leak Bluedevil
Fuel line leak sealant. A trick to any thread sealant and i no longer use ptfe tape on fuel for reasons mentioned is to leave the first thread of npt fittings dry bare metal. Gasoila soft set pipe thread sealant with ptfe paste non toxic 100 to 600 degree f 2 oz tube. Youll have leak free fittings without the hassle of tape. Cover a large area around the site of the leak to make sure that the leak is completely sealed. To choose the appropriate thread sealant look for its chemical resistance to fuel diesel or gasoline or oil running through the line. Use 3 to 5 coats for best results.
This usually keeps the crap out of the pipes. Backyard mechanics will tell you theyve used regular old gas resistant teflon tape yellow stuff with success. Give the sealer ample time to dry. Allow 30 to 45 minutes before returning the engine to service. Open the line up on one end and drain any remaining fuel out before disconnecting the other end. Using too little sealant can cause the tank to leak again very quickly and defeat the purpose of your repair.
Clean both pieces and wipe with denatured alcohol before applying it and you should be fine. Ptfe is a lubricant. I use this on most fuel and hydraulic fittings that require sealant and have not had a sealant failure in years. 2 ounce permatex permashield fuel resistant gasket dressing and sealant is a polyester urethane sealant with strong resistance to gasoline and all other automotive fluids making it excellent for a variety of applications including oil pans axle assemblies and fuel injectors. Lightly wipe sprayed area with clean cloth. Spray permatex spray sealant liberally with a slow sweeping motion.
Use extension tube for hard to reach areas. This is not recommended because it risks breaking free. Wait 1 minute between coats. Im sure there is other brands around but as long as you get a sealant like this which contains ptfe. Apply an ample amount of sealer over a large area. Theory is it allows the tapered threads to mesh better as the fitting can be tightened more.
Step 3 use a flat tip screwdriver to lever off a stubborn fuel line if it is stuck. Use a screwdriver or socket wrench and appropriate socket to release fuel line fittings that you find while working on a leaking line.
Gallery of Fuel Line Leak Sealant
