Fuel filter placement

[Mick_Anik]

If you mount a clear-plastic fuel filter in the pipe between the petrol pump and the carb, you can see 'at-a-glance' whether the petrol is flowing from the tank.......handy when you're trying to analyse the reason for a breakdown on a cold, rainy day.

[bmcecosse]

Certainly don't put it on the suction line - the pump struggles to pull fuel up as it is!

[new_adventures_of_arthur]

would a filter on the suction line add too much resistance to the flow for the pump? I havent done this, but just curious.

[Mick_Anik]

Personally, I have no idea about the technical implications of the filter I fitted. I happened to have the filter, and a couple of bits of new pipe, with right-angled bends. So the pipe from the pump goes up and across, then the filter, then the next bit of pipe from that goes across and down to the carb. So the filter sits next to the air filter.

If I am adding to the work the pump has to do, I really don't know. I suppose there must me some amount of extra resistance, to push the fuel through the paper element, but I drove to Poland in two Morrisses fitted with this and didn't have any problems.

Ultimately, I am probably reducing the life of the pump to some incalcuable degree, but I don't care. I'm like that. There is a learning curve, and sometimes it costs, one way or another.

Philosphically:

"Why a Morris Minor"

"Because it's there!"

:D

[Stig]

Certainly don't put it on the suction line - the pump struggles to pull fuel up as it is!

Only if the pump's dodgy. Mine has no trouble coping with an in-line filter before the pump.

[minor65]

If the tank is sound/reasonably new. And the fuel is good, then no extra filter required in my opinion.
Different maybe with diesel fuel (i.e water in the diesel).[frame][/frame]

[bmcecosse]

Yes - no filter required. The pump already has a little filter in the base. Any additional 'drag' on the suction line is likely to lead to fuel evaporation problems in hot weather!

[MikeHA4]

Yes, Minor65, indeed. That'll be a Water Trap which is not a filter. The fuel passes across the 'top' of a canister that has a bowl fitted/sealed to it - like an oil filter casing or the float chamber of a carburettor. Water in the fuel drops into the bowl and water-less fuel (hopefully!) passes out of the other side of the pot lid. There's often a drain at the bottom so don't have to actually unscrew the body very often. Let it run till fuel re-appears..!