Thread: Fuel leak at top of tank?

If it was those then you would be able to see them leak with pump running.

Hmmm,
Cleaned everything and fitted new seal. Fitting was straightforward with only firm finger pressure required to seat the pump so the collar could be tightened down. No visible damage to tank or pump seating surfaces and seal was correctly situated.
Still have seepage and buggered if I can tell where it is coming from. When I mopped up the diesel in the pump well (about 200ml in 600kms) it looked to weep from around the white plastic tab as shown in photo. Having said that, it is also very "wet" around the 4 pipes and the top of the pump housing.
The 4 pipes are in perfect condition with no visual damage however I can push them 1 - 1.5mm deeper into the connectors than the clips hold them.
I don't see any obvious spray/mist/dripping from the 4 pipes where they clip into the pump housing when pump is running.
Starting to think I will have to replace the pump but don't want to do that if it isn't the cause.
Cheers, Charlie
20160423_104132.jpg

Hi guys,

Problem now solved with the installation of a new fuel pump. The weeping was from one or more of the 4 pipes where they fit into the moulded nipples on top of pump assembly. The weep / leak was impossible to see, even after removing and cleaning everything then sitting in back watching while car went on a 10 km run. Fuel "appeared" after backing off after a sustained run at 2500rpm so I think it may have been the return line that was leaking.

New pump came with new pipe retaining clips which were much stiffer to engage, so perhaps it was just a case of the old gear just getting a bit loose as they were easy to clip in and out with fingers.

Anyway, if you suddenly have fuel on top of the tank and no obvious source - check your nipples

Cheers, Charlie