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I wonder if someone could advise me regarding the fuel pump on my TR7. I recently replaced the fuel hoses as some had perished and were leaking. I thought i had solved the leakage but there is still fuel coming from out of the fuel pump. I have checked the tightness
of the top screw that you use for accessing the filter and the hoses are on tight.

Does this mean the fuel pump has gone or perhaps there is something else i could try?

Thank you, Simon


TRR676R Speke Built 2.0L Tahiti Blue TR7

Simon,wheres it leaking from exactly?If its at the base,where it is
sited on engine there is a gasket which could be faulty.Inside there
is a seal which may have perished.You can get to it by unscrewing the
bolt on top and remove the top section.

See ya. Paul

It seems to be leaking from around the bottom or rear of the pump where it is bolted on to the engine, i am pretty sure it is not the rubber seal where the filter is. Thanks for the help.


TRR676R Speke Built 2.0L Tahiti Blue TR7

Hi Simon,
Have seen some pumps with a breather type hole underneath them,normaly small you maybe able to see using a mirror, if fuel is leaking out of this then its rebuild / renewal time.
Cheers John

LIVE LIFE A QUARTER OF A MILE AT A TIME!
1979 3.5 FHC(STATUS PENDING!!)

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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

<font color="blue"><b>Simon,
I had this situation not so long ago. I would tighten the hose clip until it could not be turned anymore, wipe the petrol away and then not too long after, the leak would appear again. I thought about taking the pump of and trying to fix it myself, but in the end decided to buy a new one. This as you may guess sorted out the problem. I think that the metel tube going into the pump that you put the rubber hose in, was cracked. Now there are no more leakes.
One thing to remember though if you do go for a new pump, make sure you check the timing of your car. I did forget this aspect and she started having running issues as the mixture was so rich as the new pump was so much better than the old one.</b></font id="blue">

I have ordered a new fuel pump from Robsport, they had some which did not need the spacer, so i will fit this one, along with the radiater and coolant pipes which arrived on Monday. Many thanks for the useful information, Simon.


TRR676R Speke Built 2.0L Tahiti Blue TR7