Fuel leak only when parked on a hill? - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 02-03-2014, 09:18 AM Thread Starter
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Fuel leak only when parked on a hill?

I have a fuel leak that happens as soon as I park my truck on my driveway facing downhill (not even close to steep, it has a slight slope). The leak is on the driver side about halfway down the block. It looks like its leaking from the fitting that you need a special tool to undo. There are 2 lines that both have this fitting and 1 line is thicker than the other. Both lines are coming from the top of the manifold 1 at the back (the thicker line) and 1 line coming off the top of the fuel filter housing area.
I started the truck and it continued to leak. I drove the truck around my block and then parked it in my garage so I could fix the leak. It wasn't leaking any longer. The truck was in my garage for 24hrs and it never leaked. I had to replace tensioner, idler pulley's and the serpentine belt. After I finished, I parked the truck back in the driveway on the hill and it started leaking again.

I use this truck to plow snow and for pulling my race car, so I don't drive it everyday. Im sure this has something to do with my problem.

Any help is appreciated!

Thanks in advance!!
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post #2 of 6 Old 02-03-2014, 03:02 PM
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those are the feed and return lines for the fuel. thicker one is feed smaller one is return. they are quick disconnects. any auto parts store should have the tools to undo them. i think a set of 4 was 10.49 at autozone. they are sealed with o rings and they tend to leak over time. mine did on the feed line. new orings and good to go.
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post #3 of 6 Old 02-04-2014, 08:35 AM Thread Starter
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Thank you for your help.

Can I pick up the correct o rings at the parts store also?
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post #4 of 6 Old 02-04-2014, 08:40 AM
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probably or a hardware store. i have one of those bulk o ring containers with 100s of o rings in various sizes and used one from there

94.5 F250 Reg Cab 4x4 5 speed 4.10 276000 plus miles

97 F350 Crew Cab LB 4x4 5 speed 3.55 320000 plus miles (parts truck)



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post #5 of 6 Old 02-04-2014, 08:44 AM Thread Starter
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Last question, how hard and or messy (fuel every where) will this be to change the o ring with the proper tool?
Thanks again for your help!
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post #6 of 6 Old 02-04-2014, 08:49 AM
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you're going to spill so fuel, but it will only be what's in the lines and can be drained by gravity.

94.5 F250 Reg Cab 4x4 5 speed 4.10 276000 plus miles

97 F350 Crew Cab LB 4x4 5 speed 3.55 320000 plus miles (parts truck)



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