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Old 10-22-2008, 08:15 AM
DaX's Avatar
DaX DaX is offline
Join Date: May 2007
Posts: 426
Default Fuel tank drain - sealant or not?

I'm about to leak test my first tank.

Should I use:

a) ProSeal
b) Teflon Tape
c) Nothing at all
d) Other

to install the drain fitting? It is NPT, correct? I'm betting that the Teflon tape is a bad idea...
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Old 10-22-2008, 08:21 AM
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JonJay JonJay is offline
Join Date: Jan 2007
Location: Battleground
Posts: 4,342
Default Fuel Lube

You will be taking them in and out quite a bit to drain tanks for sensor calibration and other fuel system checks. Threads are self sealing so you just need to lubricate them.
Smart People do Stupid things all the time. I know, I've seen me do'em.

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Old 10-22-2008, 08:21 AM
Sid Lambert Sid Lambert is offline
Join Date: Jul 2005
Location: North Atlanta
Posts: 1,120

Fuellube. Teflon is bad.
Sid Lambert

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Old 10-22-2008, 08:25 AM
Randy Hooper Randy Hooper is offline
Join Date: Oct 2007
Location: Nashville, TN
Posts: 229
Default Nothing permenant

You will probably be OK with nothing for the test. If anything I would use a dab of FUEL Lube. Proseal wold make it difficult for removal later, and that will happen some time in its life.
While testing you may have an issue with the cap leaking. My solution was to get a pipe plug from the plumbing department.(Home Depot) The kind that resembles a thermos bottle plug.
Good luck with the test.

Randy Hooper
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Old 10-22-2008, 08:26 AM
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Allen231ah Allen231ah is offline
Join Date: Apr 2007
Location: Cleveland Ga. (0GE5)
Posts: 123

Use a anti- seize agent . Fuel Lube available from ACS will work fine.

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Old 10-22-2008, 08:28 AM
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mannanj mannanj is offline
Join Date: Jan 2005
Location: Mtns of N.E. Georgia
Posts: 1,322
Default Seal

Originally Posted by Sid Lambert View Post
I agree with Sid. This product will help prevent thread galling if you ever have to remove the drains to replace the "O" rings.
Mannan J.Thomason, MSGT. USAF (RET)
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Old 10-22-2008, 08:36 AM
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f1rocket f1rocket is offline
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Location: Martinsville, IN
Posts: 2,344

Do not let teflon tape get anywhere near your fuel system. All it takes is one small piece to tear off and it will clog something important.

On all my plumbing fittings, I use a small dab of Form-a-gasket on the threads. It lubricates then seals. Once it hardens, it will break off when you turn the fitting.
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Old 10-22-2008, 11:58 AM
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DaX DaX is offline
Join Date: May 2007
Posts: 426

Thanks guys. I picked up some EZ Turn at Spruce yesterday when I was getting all my stuff together for the leak test - I knew I'd be using it on the fuel cap.

Randy - If I can't get the cap to seal, I know exactly what you're talking about and will get that.

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