fuel filter assembly replacement
New User
Joined: Apr 2011
Posts: 19
Likes: 1
From: Houston
The stud and Locktite was a good idea but I'd already bought a bolt just a bit over 1.5" that matched the other side and tapped the hole and it mounted up fine with no leaks. There's a leak now from the filter canister. The gasket is slightly larger than the recess in the canister so, of course, it squishes out when tightened and leaks. I'd just replaced both filter and gasket over a year ago. Weird. I'll tackle that one tomorrow perhaps. Thanks for all the help...
Lead Gopher
Joined: Aug 2012
Posts: 10,071
Likes: 1,628
From: Seattle
Does the pump pull gas when you operate it by hand? If so then without mounting it, connect up the in and out lines to it and disconnect the line where it enters the carb and see if it comes out there when you hand pump it. If so then mount it back up and crank the engine and see if it comes out the same line at the carb. If not, and it used to work, then something odd going on.
Postmaster
Joined: Mar 2004
Posts: 4,375
Likes: 5
From: seattle
You can also stick your finger on the suction side of the pump and have a helper crank...have the coil undone so it wont try to start..fan blades bite hard...Also, are the inlet/outlet lines connected right or are they reversed ?? I know that if its the original pump, and its left to dry a spell the diaphram can dry out and fail when you go to reuse the pump. If your fuel pump is not bolted together on the top and bottom sides then you have to replace the pump. If it is bolted together in the middle, replace the diaphram and carry on. The pumps are marked inlet and outlet originally as well.
- cs65
- cs65
New User
Joined: Apr 2011
Posts: 19
Likes: 1
From: Houston
I removed the pump and tried it by hand and it pumped strong. I installed it again on the truck, leaving the fuel line disconnected where it enters the carb, and cranked until I saw a pulse of gas. Ok, so connected that line and it started up, ran awhile, then died. Crank, crank...nothing. Disconnected the same fuel line at the carb again and this time cranking and cranking it was dry. Hmm. As I mentioned before, I've done the gas can test and it didn't pull any gas either. I guess I'll try that one again...maybe cranking it longer.
Lead Gopher
Joined: Aug 2012
Posts: 10,071
Likes: 1,628
From: Seattle
Have you replaced your gas cap recently? Sounds like it *might* be trying to draw air in through the cap but it's not a vented cap and so after drawing fuel for a bit it creates a vaccum in the tank and won't let the gas inside flow out. Just a hunch. You might try without the gas cap on and see if that makes any difference.
If it's created a vaccum you might hear air entering the tank when you remove the cap. Listen for that to happen and if so it might reinforce the notion.
If it's created a vaccum you might hear air entering the tank when you remove the cap. Listen for that to happen and if so it might reinforce the notion.
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Orpackrat
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
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Nov 12, 2013 11:33 PM
