Suspected fuel pump seal failure

[fatcatlawyer]

After 2 weeks of problems - Bongo stopping with symptoms of Fuel starvation at the same place, day after day after day. and having spoken with Ian Taylor, it is suggested that it is a "front seal failure" that is allowing air to disrupt the pumping pocess. There is no fuel leak, just the ingress of air.

Is the pump seal refered to one of the two that can be replaced with the pump in situ, or is it an internal one that requires the pump to be removed?

I dont want to cajole my son into scraping his wrists again (he did this job on my old fuel pump that has now been replaced) if it is not going to solve the problem.

Forgot to mention 2.5. diesel 1995 vintage.

Ian G

[wonkanoby]

front seal failure....sounds like on thats going to need the pump removed to get at to me

not the ones on rear or both sides you can get at..just

[Northern Bongolow]

just a thought,it may or may not work, ive just replaced my fuel filter,it was an oem part with the sprung valve in the bottom (water trap).whilst this was fitted,i had an intermitant ticking from who knows where.and a fuel pump leak.
after i fit a new filter (mahle KC 82) without the sprung valve,no ticking,no leak, ??.
was the ticking the pump trying to pull fuel through a faulty filter,or something else.

[teenmal]

Hi fatcatlawyer,

Do you use cooking oil,if so run the vehicle on straight diesel for a wee while and see if the leak stops.The distributor body seal has a bad habit of leaking (and spewing) when using cooking oil.

[fatcatlawyer]

I think I have worked out a temperary "fix". As the pump is below the height of the fuel filler, by making sure that the tank is nearly full last thing at night (as opposed to my usual ploy of leaving nearly empty with more diesel than oil) and this has meant that the pump is starting the day under positive pressure of the weight of the fuel in the tank, Therefore the air is not being drawn in as the fuel is being pushed by the "head" of fuel in the tank.

Last two days problem has been minimised. I still intend to get the pump seen to though.
Ian G

[The Great Pretender]

I think I have worked out a temperary "fix". As the pump is below the height of the fuel filler, by making sure that the tank is nearly full last thing at night (as opposed to my usual ploy of leaving nearly empty with more diesel than oil) and this has meant that the pump is starting the day under positive pressure of the weight of the fuel in the tank, Therefore the air is not being drawn in as the fuel is being pushed by the "head" of fuel in the tank.

Last two days problem has been minimised. I still intend to get the pump seen to though.
Ian G

The front part of the pump pulls the fuel in, another way to give it an easy life is to fit a cheap solid state pump in the fuel line to keep the pump supplied with fuel at a positive pressure.