What is the correct sealant to use on diesel fuel line threads? - Ford Truck Enthusiasts Forums

General Diesel Discussion  
Sponsored by:
Sponsored by:

What is the correct sealant to use on diesel fuel line threads?

Thread Tools Search this Thread
Old 03-26-2011, 11:07 AM
JimJr15 JimJr15 is offline
Freshman User
Thread Starter
Join Date: Dec 2007
Posts: 45
JimJr15 is starting off with a positive reputation.
What is the correct sealant to use on diesel fuel line threads?

I'm installing an aux fuel tank plumbed to my fuel filler neck. The kit from RDS doesn't tell me what, if any thread sealer I should use on the threads for the shutoff fitting at the tank, or the check valve at the filler neck?

I'm not sure if teflon tape is ok? Does anyone know what I should use on these threads. Everything is aluminum.

I searched for this, but couldn't find anything.
Reply With Quote
Old 03-26-2011, 03:10 PM
Lazy K Lazy K is offline
Post Fiend
Join Date: Jan 2005
Posts: 8,402
Lazy K is a name known to allLazy K is a name known to allLazy K is a name known to allLazy K is a name known to allLazy K is a name known to allLazy K is a name known to all
Permatex Teflon sealant would do the job, if you feel you need one at all.
Reply With Quote
Old 03-27-2011, 05:45 AM
mistakenID mistakenID is offline
Posting Guru
Join Date: Jul 2004
Location: West Valley Utah
Posts: 1,627
mistakenID is gaining momentum as a positive member of FTE.mistakenID is gaining momentum as a positive member of FTE.
Permatex makes a few thread sealant compounds that work well around diesel and gas. Also high temp thread sealants for engine sensors like temp, 02 exc.

Make sure you don't use a thread locker where you want a sealant!
Reply With Quote
Old 03-31-2011, 01:24 PM
joshofalltrades joshofalltrades is offline
Join Date: Feb 2011
Posts: 3,555
joshofalltrades has a good reputation on FTE.joshofalltrades has a good reputation on FTE.
First thing to think about is the type of fittings you have. No sealant is used on flare fittings, compression fittings, and several other types, but a npt fitting requires it. Assuming you do need sealant,i believe teflon tape would hold up BUT its likely to have some loose pieces of tape inside that may clog up the strainer, so I would use a sealant that you apply as a liquid such as the permatex. The package should specify what it is and is not suitable for
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Inner fuel filler hose replacement or entire assembly? OldGoldie 1987 - 1996 F150 & Larger F-Series Trucks 1 06-11-2017 08:59 AM
Welded the Fuel Filler Neck, do I need to recoat the inside? wavetrain75 1948 - 1956 F1, F100 & Larger F-Series Trucks 2 08-10-2016 08:24 PM
Rear filler neck and hose... UGHHHHH smashclash 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 24 10-14-2015 01:31 PM
Fuel tank filler neck teamlx88 1997-2006 Expedition & Navigator 5 06-15-2014 07:48 PM
Changing a fuel filler hose sogath 1973 - 1979 F-100 & Larger F-Series Trucks 14 05-12-2011 06:41 PM

Go Back   Ford Truck Enthusiasts Forums >

break, connection, cylinder, diesel, fuel, gas, line, sealant, sealants, sealer, selant, tape, teflon, thread, threads

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -5. The time now is 10:54 AM.

  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: