Revfan

Hey guys

67 Vert with a 66 327/300 Carb-to-pan

I been noticing a gas smell in the garage, and tracked it down to the Fuel Pump "outlet" where the Carb line connects.

A little background is that mid summer I replaced the Carb on the motor with the correct 66 unit, and switched from a rubber pump to carb line to the correct steel one.

I tried "tightening" up the line, but its still leaking.

Any suggestions? Is there a fuel line equivalent to plumbers Teflon tape?

THANKS, in advance!


****UPDATE****
SOLVED... I think...

The Fuel Pump end of the Carb Fuel Line was probably not seated correctly. I followed the advice below, and clamped the inlet hose removed my front wheel/jacked up the car (to get better access) removed the line, inspected the line (it was chromed steel - at least a magnet stuck to it) seemed ok so I put it back on MADE SURE IT WAS SEATED SECURELY then tightened it.

I haven't started the car yet... as I did get some gas all over and I want it all to evaporate first, but the connection is dry so I am fairly confident that all is well.

vettsplit 63

I had a similar problem on the inlet side of the pump on my 63 using the brand new correct fitting that swivels. No matter how much I tightened it, it leaked between the fitting and the tube. Finally ordered another one, put it on and the leak stopped. I examined it and can't really see why it leaked, but it did. You might try putting another new fitting, or tube

dkleather

I'd suggest removing the new line and checking the flared surface that interfaces with the inside of the pump. Use a flaring tool to make sure the inner face of the flare has no distortions and reinstall making sure the line is squarely seated and held that way until the fitting is tightened.
I had this problem just last week on a 72 LT1 I'm working on. The new line upon removal had a very slight imperfection on the flare surface which prevented a perfect seal. I think it may not have been squarely seated inside the pump when I tightened it the first time. Doing what I suggest above solved the problem for me. Dave

tuxnharley

Make sure the outer edge of the flare is clean and smooth, and make sure you have it properly seated in the pump before you tighten it down. Also make sure there isn't any debris in the seat in the pump. Don't assume that tightening it down will seat it properly - I've made that mistake when in a hurry in the past...

I'd suggest holding the line with one hand, rocking it slightly to make sure its seated properly, holding it in that position, and using the other hand to start the nut and securing it finger tight before using a flare nut wrench.

gphil460

I've successfully (carefully)applied a thin coat of permeatex gasket sealer to surface to stop such leaking.
Gerry

Nowhere Man

Did you buy a stainless steel line or a carbon steel line

Revfan

Carburetor fuel line, chrome, all with 327/300 h.p. and Holley carburetor
https://www.paragoncorvette.com/p-35...327300-hp.aspx

Nowhere Man

Stick a good magnet to it and see what happens

Revfan

SOLVED... I think...

The Fuel Pump end of the Carb Fuel Line was probably not seated correctly. I followed the advice above, and clamped the inlet hose removed my front wheel/jacked up the car (to get better access) removed the line, inspected the line (it was chromed steel - at least a magnet stuck to it) seemed ok so I put it back on MADE SURE IT WAS SEATED SECURELY then tightened it.

I haven't started the car yet... as I did get some gas all over and I want it all to evaporate first, but the connection is dry so I am fairly confident that all is well.

dugsgms74

Common problem, even with factory lines. Usually tightening it till it stops leaking works(sometimes requires alot of force) but sometimes no matter how tight you make it it still leaks. In those cases I use flare savers, basically a small cone shaped copper washer. Still have to tighten it alot with the flare savers but that usually will solve the problem.

JohnZ

Here's what the "flare saver" washer looks like.

Revfan

I guess I spoke too soon!

I went and checked last night and its still weeping a bit (not as bad as before)

I am hesitant to torque down on the line in fear of stripping/breaking/causing more trouble.


Does anyone have a few of these flare savors lying around? I have no idea where I'd get em in Germany. I have a US PO Box on base and I'd paypal you compensation.

dugsgms74

I've got a few for 3/8" line, PM me the address and how many you need and I'll send then to you.

Revfan

Awesome!

PM sent!

stratplus

Well, who would of thunk that there is something called a "flare saver" Maybe you really can train an old dog a new trick

tuxnharley

John - Is there anything you don't have a picture of?

MikeM

I'd try this drill one more time. It's a good method to get flares to seat leak free.