fuel line disconnect
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New User
Joined: Feb 2004
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fuel line disconnect
i am trying to put a new motor in my f-150. i have a 351w and cant get the fuel lines apart. i rented a tool kit for fuel lines and still no luck. is there a backwoods secreat to getting these things off. any help will be greatly appreciated.
Elder User
Joined: Sep 2003
Posts: 926
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From: SE, Michigan
There are 2 different size lines I have seen on these trucks. A 5/16 and 3/8 line. Make sure you have the correct size for the line. Press the tool all the way into the coupling so that it will completely release the metal little teeth inside the coupling. As long as you have the tool pressed all the way into the coupling it will come apart with a good pull. Hope that helps. Fred
Freshman User
Joined: Feb 2004
Posts: 47
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From: San Diego
Yeah, they can be sticky even when you have the tool pressed in there....just push the right size tool all the way in, spin it around and tug real hard and it will come off. Try wiggling it a litte too when your pulling. Don't hurt yourself.
Freshman User
Joined: Jan 2004
Posts: 31
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The best thing I have found to free up the connections is use some WD-40 on them. Once they are soaked good, spray air in the connection this always seems to free them up. Sometimes they snap right off and other times I have spend a half-hour fighting them.
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gammatino
1987 - 1996 F150 & Larger F-Series Trucks
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Sep 14, 2025 08:51 AM
