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Topic: Fuel leak (Read 1437 times) previous topic - next topic

Re: Fuel leak

Reply #20 –
Quote from: red tractor –
I have noticed on the newer coaches like 03 that there are 3 lines on each side. There should be numbers on the lines. I don't have a diagram from Foretravel, but you should be able to find the numbers on the other end of the lines. I am pretty sure the engine supply is 5/8, return line 1/2, and then the generator and aqua hot are each 3/8.
My 96 U320's AquaHot fuel lines are 1/4 inch.

Re: Fuel leak

Reply #21 –
Quote from: dsd –
Kieth it looks like you have the original lines? Very likely your leak is from them.

This would probably be the first 2003 to have an issue with fuel lines (if that's the problem).  The 1990's and up through 2001 were seeing cracks, but I don't ever recall a 2002 or newer having the same issue.

Re: Fuel leak

Reply #22 –
Quote from: Michelle –
This would probably be the first 2003 to have an issue with fuel lines (if that's the problem).  The 1990's and up through 2001 were seeing cracks, but I don't ever recall a 2002 or newer having the same issue.

I'm confident the issue is not with the lines, but rather with the fittings.  I had to tighten one a full turn, another 1/2 a turn.  The fitting on top with the 5/16" line going to it, presumably the vent, was also loose to the tank.  I'll be checking them all on both sides this weekend and safety wiring the top fitting to the side fitting so it cannot loosen up.

Re: Fuel leak

Reply #23 –
Today I got into the street side of the fuel tank to check for leaks.  Man, they didn't leave any room to remove the fiberglass panel, so the best I could do was pull it outward and shove my hand (and phone camera) back behind it to check for fuel and see if the fittings were tight.  All were tight and there is no fuel residue on this side.  There are 3 more fittings, like on the other side, but no top mounted vent on this side.

On the curb side, I tightened the top mounted vent fitting and safety wired it to one of the side fittings, so it cannot loosen up again.  Since I've turned the fitting over 90* from it's original location, the nipple now faces in the wrong direction.  I found this hose called "sidewinder" on Amazon.  It's got several different bends in it and you can just cut off the bend you need...pretty handy!  I used the 120* bend and a union to connect it to the original vent hose.  That original vent hose didn't have a great end on it, so maybe this is where some fuel was coming from when sloshing...I'm hoping.

The proof will be shown next week after my trip to Q.  I'm leaving the curb side fiberglass cover off so I can keep an eye on this area.

Re: Fuel leak

Reply #24 –
Keith, Hopefully you've found your leakage . We are heading to Q Tuesday. Rain should stop by then.  See you there.
 

Re: Fuel leak

Reply #25 –
Didn't make the Q trip, but did go to Havasu in February.  While the smell was much reduced, I still had a little.  After this trip, I found a small trace of discoloration coming down the tank from the fuel sender.  Upon inspection, the new fuel sender I installed a year or so ago with the provided cork gasket, is weeping.  When I removed it, the cork gasket was completely saturated in diesel.

I bought a Sierra #64082 rubber universal gasket and replaced the cork one today.  I also decided to put a thin film of Permatex Ultra Black RTV.  Hopefully this stops the weeping and smell altogether finally.