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I have recently become carer for an 97 Isuzu MU.Having a few fuel issues.Going to start by changing fuel filter as I have no idea when it was changed last.
Did the aircleaner already and that wasn't a pretty sight!
Filter fitted has a removable water drain device on the bottom(I have a replacement in hand) and a spring loaded plunger (pump?) on the top of the housing.
What's the story re. removal,replacement,filling the filter before replacing? (or not),bleeding,etc.Is the vehicle self bleeding?
Any help much appreciated.

In theory you can just unscrew the tap on the bottom of the plastic part on the bottom of the filter to drain it then unscrew this then the filter. Ive always found it better to trac the wire in the plastic piece to a plug. Unplug it there then unscrew the filter with the plastic part in place. The plunger on top is to prim it. Unhook the line to the fuel pump and operate the priming pump till fuel apears then reattach

All sorted.No thanks to the person that changed the filter last time and put gasket shellack on the sealing rings.
Filter was full of crap as expected.Fuelling issues have been rectified.Happy car.

filter last time and put gasket shellack on the sealing rings.

Do you know who it was? Can you put superglue under their tyres?
Tempting I know but dont do it