fuel filter

[jon haines]

i need to replace the fuel pipe from the filter to pump as well as the filter itself. bible says let a specilist do it but i want to know if and how to do it myself.someone must have done it.

[rev-erend]

It's a doddle .. it's 8mm fuel pipe.

Not too much fuel comes out as the pump stops the flow..

use a catch tank - something like a paint roller tray - that's what I'm using and replace the pipe clips too !

[matt-man]

I did mine myself when i changed the fuel pipe...

Also, make sure you buy a fuel filter to go between the tank and the pump, not just the one after the pump. That mistake cost me 2 pumps in 2 months!!!

PS-i got covered in fuel!!!

[gsx600]

I even managed to get one from Halfrauds of the shelf for the main filter next to the swirl pot for about a tennor

[rev-erend]

matt-man said:

I did mine myself when i changed the fuel pipe...

Also, make sure you buy a fuel filter to go between the tank and the pump, not just the one after the pump. That mistake cost me 2 pumps in 2 months!!!

PS-i got covered in fuel!!!

Matt - doe sthat mean you found a filter with 12mm inlet and outlets ..

The main tank fuel come out very fast indeed - I wear industrial marigolds when doing this...

[TVRleigh_BBWR]

I got a source of pre-pump filters. they are about £65 tho but have a brass re-cleanable filter.

most of the swirl pots had a pre-filter, but the newer ali ones don't.

[matt-man]

rev-erend said:

matt-man said:

I did mine myself when i changed the fuel pipe...

Also, make sure you buy a fuel filter to go between the tank and the pump, not just the one after the pump. That mistake cost me 2 pumps in 2 months!!!

PS-i got covered in fuel!!!

Matt - doe sthat mean you found a filter with 12mm inlet and outlets ..

The main tank fuel come out very fast indeed - I wear industrial marigolds when doing this...

Indeed i did!! I couldnt get one off the shelf, ordered it from David Gerrald, it was £62.28 delivered inc VAT.

Looks lovely, shiny red with chrome edges...shame you cant see it!! Its got a removable brass filter but im not gonna undo it to clean it unless i have to!!

Eau de optimax just aint my smell...!!!

[jon haines]

this might be usefull to someone,got this from my mechanic. before changing any fuel lines/filter depresurise the syetem by disconecting the multiplug at the airflow meter then crank engine over for a couple of seconds. i did this and only got a little trickle of fuel coming out of the filter when i removed it.

[rev-erend]

True but it generally depressurises over time anyway .. mines luchy if it gets started weekly..

[ferlin]

What type of filter was fitted as standard then please? 12mm inlet/ outlet? and what car was it off?

[GV]

When I converted from EFi to Carb - I moved my fuel filter into the engine bay. Not a problem when fitting provided that its connected in the direction of the fuel flow. This often signified by an arrow stamped on to the body of the filter. I would replace the jubilee clips for new ones too.

[combine]

matt-man said:

I did mine myself when i changed the fuel pipe...

Also, make sure you buy a fuel filter to go between the tank and the pump, not just the one after the pump. That mistake cost me 2 pumps in 2 months!!!

PS-i got covered in fuel!!!

Matt , wondering if its best just to have a filter between tank and pump ie don't need another after ?

[rev-erend]

ferlin said:

What type of filter was fitted as standard then please? 12mm inlet/ outlet? and what car was it off?

It's 8 mm in and 8 mm out.

[matt-man]

combine said:

matt-man said:

I did mine myself when i changed the fuel pipe...

Also, make sure you buy a fuel filter to go between the tank and the pump, not just the one after the pump. That mistake cost me 2 pumps in 2 months!!!

PS-i got covered in fuel!!!

Matt , wondering if its best just to have a filter between tank and pump ie don't need another after ?

Possibly...but i'd already changed this and it fits nicely into the system (as i changed most of the fuel line too...) and havent had any problems...

[TVRleigh_BBWR]

you will need both, a pre and post filter.
Before the pump one is needed to stop the pump getting knackered (you can run without for a few days / Weeks. But this has to be a corse filter else you will not get enough gravity feed to the pump. the one after the pump is a very fine filter, it even will take any colour out of the fuel, its that fine. but it need a pump before to get the right amount of flow, if this is not install you will block you injectors in about 5 mins.

[Hamish400]

Having written off a new fuel pump because of dirt from the fuel tanks I fitted a pre-pump strainer. It is "bullet" filter with 12mm connections if I remember correctly. Purchased from Demon Tweeks. You will need the mesh element (strainer) not the paper cartridge filter element.
The paper element is too restrictive to the fuel flow by gravity, in to the pump suction.
The mesh element stops the lumps which might damage the fuel pump. The fine filter after the pump stops the small particles which may clog up the injectors.

When fitting the pre-pump strainer, I drained the tanks and added a 12 mm ball valve between swirl pot and strainer. Ball valve purchased from local plumbers merchants. You need to use a ball valve as it offers no flow restriction when in the open position.
ie fuel flows as follows
swirl pot - ball valve - strainer - fuel pump - fuel filter - engine.

Initially when the strainer started to get dirty the engine started being starved of fuel at high revs and low fuel tank levels (low head on the pump suction).
The "starvation revs" decreased as the strainer got dirtier.
Now the dirt has been flushed out of the tanks the strainer stays pretty clean, and is easy to inspect due to the isolating ball valve between swirlpot and strainer.

Rgds
Hamish