RRGOO7

Im having a drip coming from my front and rear carbs on my 427 435. All lines are snug and tight. Anyone have the same problem?

I spoke to a friend of mine and said it could be from the ethanol in the fuel now.

jdk971

are you saying the carb inlets are leaking. where the metal line is attached. jim

RRGOO7

Yes

nassau66427

Loosen them up, tighten them down; loosen them up, tighten them down.................then..........loose n them up, tighten them down.

After you've done that a few times, put a brown paper towel or paper grocery bag under the lines. Fire the car up briefly, shut it off and check for leaks. Any leak will show up readily on the brown paper.

You should be good to go.

Others may have different solutions. This worked for me.

larrywalk

If you're are tightening inverted flare fittings, use some anti-seize on the threads and flare part of the tubes. The reduced friction will help get a tighter seal.

65 vette dude

If the fitting are chrome plated.....that could be your problem.

54greg

Pilot Dan

Had that problem with a new fuel line install the other day on the 59. On off on off tighten drip tighten drip then finally got it to stop. It was under the car so of course I got covered in gasoline...... several times . At least you don't have gravity fighting you! Pilot Dan

RRGOO7

Thanks guys. im going to give it a shot today

66since71

Also, the large fitting to the carb (the one the flare fitting screws into) can leak. Be very careful not to strip it, but it may need a new gasket and a little gasoline proof thread sealer. Also be sure to use a backup wrench on this fitting when you tighten the inverted flare fitting.

Harry

Steve59

When I was installing my new tank and SS gas lines on my 59, one of the best pieces of advice that someone here gave me, was to "seat" the fittings BEFORE installing everything. This was just a matter of tightening/loosening about 3/4 times to seat the flare. Good advice.

6T7L71CPE

This multi piece arrangement can leak if not aligned well and each fitting/line is fighting the others. I have found this to work for me: Starting with all NINE fuel line fittings loose, carefully tighten the carb inlet, then start slowly snugging up the fuel lines as you wiggle the lines trying to center the flares as best possible. I do the carb flare fitting last while holding the carb inlet in place with a wrench as I tighten the flare fitting. I do this so the carb fitting worn't get over tightened. Lubing the lines as noted above helps too. I've seen the fuel line at the carb get torqued as it was tightened and then cause the carb inlet to back out. I've considered replacing this all with AN fittings and flexible lines. Anyone done this?

jdk971

make sure you use two wrenches, best is the wrenches for flare fittings. jim

Chrisintampa

mine leaked, as did my dad's. i went thru both of them with automotive thread sealant. issues are gone.

Five Window

Yes. I put flex hose and AN fittings in with my new Quick Fuel carb. I still had leaks where the fittings screwed into the carb bowls. I found that you have to carefully center the thin gaskets on the fittings before tightening or they will tend to drop down a tiny amount and not be concentric with the seating surfaces. Once I did this by placing a finger tip under the gasket while tightening, the leaks stopped.

Of course, the AN fittings never leaked, and this is a blessing!

JohnZ

There really isn't room for the AN fittings required; if you use conventional steel fuel lines instead of stainless, the installation is generally leak-free. The double-flares on stainless lines are very hard, and can damage the flare seats in the brass blocks before they seal.

DansYellow66

Absolutely, this is the way to seat the flare to the carb seat. Also works for new brake lines. You don't have to tighten them like your life depends on it - just snug them up moderately tight and loosen them and repeat for several cycles.

1lildog

I have a hard time getting on the carb fitting with a wrench, is there another way?

jdk971

i believe they are called line wrenches. same as ones used on brake lines. hope some one
will correct me if i am wrong. jim

66since71

I actually think he is talking about the large fitting ( about a 1" open end wrench). It's pretty easy to get a wrench on a single 4bbl, but the tri power set up looks very tight. Holley used to make a special wrench for it, but I have not seen one in years. What are the other tri power guys using?..

Harry