carb leak
Thread Starter
Pro
Joined: Oct 2005
Posts: 581
Likes: 0
From: Boynton Beach Florida
carb leak
I put on a new holly street avenger carb that I picked up from someone on the forum.I tried the fuel lines that came with the carb then one from Summit which was a solid double pumper line and then a braided line. All three leak where they screw into the carb. Its more than a small leak the fuel pours out. any suggestions
Burning Brakes
Joined: Aug 2005
Posts: 1,164
Likes: 1
From: Europe, France
How much torque did you apply to the fittings ?
Did you use some teflon tape on the threads to allow more tightening torque without seizing ?
What are the fittings and pipes made of ? Stainless steel, chromed copper/brass ? SS ones need a lot of torque.
Did you use some teflon tape on the threads to allow more tightening torque without seizing ?
What are the fittings and pipes made of ? Stainless steel, chromed copper/brass ? SS ones need a lot of torque.
Burning Brakes
Joined: Aug 2005
Posts: 1,164
Likes: 1
From: Europe, France
I have noticed that sometimes, the female carb fitting is just not threaded deep enough for the male fitting.
So, even with a huge amount of torque, the pipe can't be sealed.
This happened to me with a Summit dual feed line and Mr Gasket carb fittings.
So what did I do ? I used a small file on the two first male threads, which allowed the male fitting to go a little further ( about 1/4 turn ) and eliminated the leak.
So, even with a huge amount of torque, the pipe can't be sealed.
This happened to me with a Summit dual feed line and Mr Gasket carb fittings.
So what did I do ? I used a small file on the two first male threads, which allowed the male fitting to go a little further ( about 1/4 turn ) and eliminated the leak.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Most commonly, this is due to either a bad flare - which I think you've ruled out with different lines - or improper tightening. Make sure you seat the flare, then tighten the nut - don't just tighten the nut.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Burning Brakes
Joined: Aug 2005
Posts: 1,164
Likes: 1
From: Europe, France
Yes, even if you manage to make the fuel lines leakproof, check everything again with engine at normal operating temperature before you run the car on the road.
Heat and vibrations can sometimes change things... No error is permitted with fuel and hot surfaces...
