Fuel Line Inlet
Thread Starter
Race Director
Joined: May 2003
Posts: 11,814
Likes: 9
From: Science Bitch! Mississauga, Ontario
Canadian Events Coordinator
Fuel Line Inlet
Ok, I FINALLY installed the carb and intake [Speed Demon/Performer RPM]
The car starts and runs fine, except I have a leak at the fuel line inlet.
I'm not sure why it's leaking. It's on tight, but I suspect I didn't use enough teflon tape.
Any ideas?
Thanks, Les
The car starts and runs fine, except I have a leak at the fuel line inlet.
I'm not sure why it's leaking. It's on tight, but I suspect I didn't use enough teflon tape.
Any ideas?
Thanks, Les
Team Owner
Joined: Sep 2001
Posts: 30,958
Likes: 0
From: Middletown Connecticut
Cruise-In IV Veteran
I remember I was chasing gas leaks down for a few days..
check all the fittings, re snug em.. wipe them dry.. bump the starter a few times.. check to see where on the lines it is wet.
keep tightening.. I used very minimal tape
check all the fittings, re snug em.. wipe them dry.. bump the starter a few times.. check to see where on the lines it is wet.
keep tightening.. I used very minimal tape
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
The white tape will disintegrate and leak 
Sorry but how's it running anyway ? I did my intake last weekend and I have the dreaded oil leak at the back, gonna try some Permatex #2 on it
Sorry but how's it running anyway ? I did my intake last weekend and I have the dreaded oil leak at the back, gonna try some Permatex #2 on it
Last edited by MotorHead; Nov 16, 2004 at 07:20 PM.
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Melting Slicks
Joined: Jul 2002
Posts: 3,000
Likes: 22
From: Boulder Creek California
AN carb fittings are still pipe-thread at the carb aren't they? I suspect redoing the teflon tape and reinstalling will solve it. Even if white stuff disintegrates in fuel, it wouldn't happen that fast would it? 2-4 turns, make sure you are wrapping it the right way. Looking INTO the carb it should be wrapped counterclockwise. That way it doesn't unravel when you install it.
Don't go crazy on it, just good and snug should do.
-Chris
Don't go crazy on it, just good and snug should do.
-Chris
Burning Brakes
Joined: Oct 2004
Posts: 1,038
Likes: 0
From: Grants Pass Oregon
Fuel Inlet
The fittings you are using the tape on are actualy called graduated fittings. That means the farther into the thread you screw the female cap the larger the male fitting gets. Its graduated by thousands so realy its more important to have clean threads than teflon tape. Also the best treatment is a very minimal amount of fuel proof teflon paste. Its sold in a tube and is available at most chain auto parts store. The Tape is made for plumbing fittings and realy is not sutible for any other aplication.
Senior Member since 1492
Joined: Aug 2000
Posts: 87,959
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Originally Posted by MotorHead
The white tape will disintegrate and leak
Sorry but how's it running anyway ? I did my intake last weekend and I have the dreaded oil leak at the back, gonna try some Permatex #2 on it
Sorry but how's it running anyway ? I did my intake last weekend and I have the dreaded oil leak at the back, gonna try some Permatex #2 on it
White will dissolve forming smaller pieces and clog your needle/seat and fuel bowl causing fuel to dump into your carb. Not that I know this from personal experience.
Burning Brakes
Joined: Oct 2004
Posts: 986
Likes: 23
From: Florence SC
I'm assuming your leak is on the carburator. The fitting that screws into the carb. bowl take a gasket no sealer is needed, where the fuel line screws into the adaptor also requires no sealant because it is a flaired connection. I think there really shouldn't be any tape or sealant used on gas lines, anyway tape is just a thread lubricant to reduce the gauling effect so the fitting can be tightened till the thread interferance makes the seal. The real "seal" lies with the gasket and the flair fitting. Just my thoughts. 
Drifting
Joined: Mar 2003
Posts: 1,608
Likes: 3
From: Canberra AUSTRALIA
St. Jude Donor '05-'06
Check the flange on the fuel line and in the carb. Remove all residual tape. Put tape in bottom draw of toolbox. Ever see a new car with tape on its fittings? I am guilty of using tape also but Lars corrected my evil ways.
Make sure the flange fitting is both clean and smooth and the SAME angle taper on both the female (fuel ine) and male (carb) sides. Look for where the tape may have been skewed and possible scoring (scratchs) on the flange. Lube the threads of the nut with some white lithium grease. Also put a dot on the flange where it mates also. Remove the excess grease and wash your hands. Seat the flange and make sure it is nice and parallel then handtighten the nut so that the flange is snug. Using wrenches tighten it up as little as possible to snug it. Test it. If needed snug a little more remembering that you are tightening up on a aluminium carb.
It took me 3-4 times on my last carb to get it to stop. No magic just repeated the above steps. When it is all lined up and the flange seats right the fuel stops coming out.
Good luck.
Pete
Make sure the flange fitting is both clean and smooth and the SAME angle taper on both the female (fuel ine) and male (carb) sides. Look for where the tape may have been skewed and possible scoring (scratchs) on the flange. Lube the threads of the nut with some white lithium grease. Also put a dot on the flange where it mates also. Remove the excess grease and wash your hands. Seat the flange and make sure it is nice and parallel then handtighten the nut so that the flange is snug. Using wrenches tighten it up as little as possible to snug it. Test it. If needed snug a little more remembering that you are tightening up on a aluminium carb.
It took me 3-4 times on my last carb to get it to stop. No magic just repeated the above steps. When it is all lined up and the flange seats right the fuel stops coming out.
Good luck.
Pete
Originally Posted by AGVI
Ok, I FINALLY installed the carb and intake [Speed Demon/Performer RPM]
The car starts and runs fine, except I have a leak at the fuel line inlet.
I'm not sure why it's leaking. It's on tight, but I suspect I didn't use enough teflon tape.
Any ideas?
Thanks, Les
The car starts and runs fine, except I have a leak at the fuel line inlet.
I'm not sure why it's leaking. It's on tight, but I suspect I didn't use enough teflon tape.
Any ideas?
Thanks, Les
