Got a small fuel leak. Turns out it is coming from that little bronze petcock that opens the drain from the fuel filter cannister.
The line for that runs from the cannister, under the intake manifold to the front of the engine. At the front is the petcock (next to the thermostat goose neck) from the petcock, the drain tube empties out in the valley .
The line from the filter to the valve runs in a flex conduit.

The leak is at the joint of the petcock and the line. I tried clamping it but there is stll a small seep.

Has anyone changed that line? Can the replacment be fed from the front, thru the conduit back to the fliter or must the intake manifold be removed to get to it?

Chris
95 Suburban 2500

It's pretty easy to feed the new fuel line in. Have you tried cutting the line back an inch. usually lasts till you are ready to replace it.

Do you mean cutting back an inch at the valve? I don't think I have even half an inch slack to deal with. does that line just slip onto the bottom of the valve?

Get about 3' of fuel line and make the drain line drain to the side of the front of the engine or to where you could catch it if you prefer but not in the valley.

Yes it just slips on, may have a screw or spring clamp on it; for time being you can cut back the split part and jam a bolt with a shoulder on it into the hose up to the shoulder and clamp the hose to the shoulder, can't be threaded all way or fuel will leak past the threads, shank end of a drill bit makes a good temp plug, maybe easier using a drill bit to fit hose than a bolt.

The right size bolt will work evertime. I had to put one in a section of 1/8" injector return line on the side of the road when I lost a terminal cap one day. that bolt is still holding leak free. Edited by: quantum mechanic

Get about 3' of fuel line and make the drain line drain to the side of the front of the engine or to where you could catch it if you prefer but not in the valley.
I 've been trying to figure out a better place to have the drain end, in case I ever use it , ( which I have not in 200K) on the side is too near exhaust manifold, in the front it could be blown around by wind and fan. This is all in the event valve leaks and let's it drip from tube.

Acutally, the factory location is not bad, just a little messy in the valley.
Guess I could lenghten it by a couple feet so it drains down the back sied of the engine and exit near the pan.

From the factory, the petcock drainline runs straight down from the petcock to below the engine, doesn't it?


PS: I had the exact same leak after tugging on that line too hard while replacing the thermostat housing. Plugged it with a bolt and hoseclamp for months before I got around to running a new hose.

From the factory, the petcock drainline runs straight down from the petcock to below the engine, doesn't it?


PS: I had the exact same leak after tugging on that line too hard while replacing the thermostat housing. Plugged it with a bolt and hoseclamp for months before I got around to running a new hose.

On mine, it ended in the valley under the manifold.
I think my leak was caused by the same thing- thermostat replacement.