Postby Hasbeen » 17 Feb 2008 22:37
Simon, there appears to be a number of different pumps used on the 7.
All the ones I have looked into, have the same system. If [or when]
the diaphragm, [the bit that pumps the fuel] develop a split, petrol
will leak into the bottom, mechanical part, of the pump.
Petrol leaking into there can only do one of three things.
1/ leak out between the pump, 7 the block.
2/ drain out of any drain hole provided.
3/ drain through the pump cam arm slot, into the engine sump.
If the gasket between the pump, & the block, is in good condition,
[if its not, oil will be leaking out] the petrol must go into the
sump. How does your oil look?
The other areas of probable leak are the inlet, or outlet fitting,
in the pump body.
These are a brass tube, & I have no idea how they are secured into
the pump, in manufacturing. I have seen many of them come out,
[as also happens with die cast carbs]. Putting them back in, with
Locktite APPEARS to be OK.
With most pumps the diaphragm is clamped between the top & bottom
parts of the pump. These are held together with 6 screws. If some of
these are loose, or the outer edge of diaphragm, which makes the
seal, is damaged, it will leak.
Either of the above would appear to come from the bottom of the pump.
Give it a through clean, & dry, then look for a wet area.
Hasbeen
PS. Make sure the hose clips, on the new hose are still tight, as
the new rubber will stress rellieve, to some extent, quite quickly,
requiring the clamps to be tightened.
Hasbeen
