Thread sealing on fuel fittings? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Suspension - Brakes - Steering
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-15-2009, 09:38 AM
staleg's Avatar
Registered User
 

Last journal entry: Hand brake
Last photo:
Join Date: Dec 2005
Location: Norway - Europe
Age: 47
Posts: 787
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Thread sealing on fuel fittings?

Do you use any kind of thread seal on fuel line fittings?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-15-2009, 09:46 AM
Registered User
 
Last photo:
Join Date: Sep 2009
Location: Colorado
Posts: 176
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I use Teflon tape being careful not to start the tape over the end of the fitting where it could become cut off and float through the fuel system until it finds the most expensive component where it can lodge and do some damage
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-15-2009, 10:30 AM
Member
 
Last photo:
Join Date: Aug 2005
Location: Virginia
Posts: 875
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Nothing need be used. Most should be NPT or A-N.
NPT threads are tapered for sealing and A-N have an angled mating surface for sealing.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-15-2009, 11:46 AM
59 wagon man's Avatar
Registered User
 
Last photo:
Join Date: Oct 2006
Location: hollywood fla
Posts: 278
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
npt threads can always use a little lubricant to aid in sealing. there are plenty of teflon paste available which work great and clean up easy
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-15-2009, 12:04 PM
staleg's Avatar
Registered User
 

Last journal entry: Hand brake
Last photo:
Join Date: Dec 2005
Location: Norway - Europe
Age: 47
Posts: 787
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Thank you for your answers!
I intend to use a bend like the one pćictured below on my frame mounted fuel filter to receive the hose from the tank and I am wondering how it is possible to "hit" with the torque (= make a proper seal) at the same time that the bend is pointing in the direction that I want it to?

To hope the threads will bottom out in the fuel filter at the very same time the bend is positioned correct will be too much of a considence...? So how do they fasten fittings like this?

Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-16-2009, 08:58 AM
Frisco's Avatar
Glad To Be Here
 
Last photo:
Join Date: Nov 2002
Location: Canton, North Carolina
Age: 73
Posts: 2,244
Wiki Edits: 0

Thanks: 0
Thanked 8 Times in 8 Posts
Quote:
Originally Posted by staleg
Thank you for your answers!
I intend to use a bend like the one p堢elow on my frame mounted fuel filter to receive the hose from the tank and I am wondering how it is possible to "hit" with the torque (= make a proper seal) at the same time that the bend is pointing in the direction that I want it to?

To hope the threads will bottom out in the fuel filter at the very same time the bend is positioned correct will be too much of a considence...? So how do they fasten fittings like this?

A good non-hardening fuel resistant gasket paste should be used on threaded fuel line fittings with tapered pipe threads. Do not depend on the taper alone for the sealing. Teflon tape when applied correctly will also work.

The fitting you show in the photo appears to be tapered pipe threads. It should not bottom against anything or it will not seal. Tapered threads sealing properties are dependent on the interference of the taper.

Hopefully that fitting will be close to lining up in the direction you want and that some additional torquing will get it tight and pointing correctly. Over tightening the fitting will crack or even snap off the fitting. I would suggest you consider using an AN straight adapter (tapered pipe threads on one end and AN fitting on the other) from the fuel filter and then an AN fitting with a 90 degree bend from there. The AN fitting can be aimed in the direction you need and the AN fittings will seal excellent with no added sealant. You will still need a fuel resistant non-hardening sealer applied to the pipe threads. I like Permatex brand sealers.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-17-2009, 09:34 PM
Member
 
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 65
Posts: 5,103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I like the liquid Permatex (#3 or Super-300).
Reply With Quote Quick reply to this message

Recent Suspension - Brakes - Steering posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Earls fuel hose fittings difficulty STUDE55DOG Engine 5 03-16-2008 04:23 PM
DARK brown--BLACK plugs SBC Joshua Lee Engine 130 02-03-2008 10:12 AM
Use of Plastic or Brass Fittings in Fuel Line? JohnTN General Rodding Tech 8 11-02-2007 10:57 AM
93 Suburban fuel pump sabino56 Engine 8 09-10-2005 03:54 PM


All times are GMT -6. The time now is 03:49 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.