Fuel Filter

[debaron]

Hello all. Want to change my fuel filter to sort out rough running but don't know where it is and how to get to it. Can someone give me any advice on this job?

Thanks

Ryan

'96 400 Serp

[V8 Animal]

Above the rear passenger wheel stuck up the arch.
V8 Animal

[Chimjunkie]

Jack car up onto axle stands to get comfortable access. Can be awkward because chances are the mounting bracket will be rusted solid plus access poor. REMEMBER to depressurise the fuel system before loosening the fuel connections. There is a depressurisation valve on the fuel rail. Make sure you note which way round the new filter goes. Anyone for anymore? Did this a long time ago so memory a bit rusty..

[MADMAX2]

Chimjunkie said:

There is a depressurisation valve on the fuel rail

ahhh so that where it is i wondered what it was!!!!!

[V8 Animal]

Is that the black screw in thinghy on the fuel rail??

[Chimjunkie]

V8 Animal said:

Is that the black screw in thinghy on the fuel rail??

Cant say for early cars, but on mine it is a valve similar to a car tyre with a dust cap over it. Unscrew dust cap and hold a cloth over the valve whilst poking the centre bit. FUEL UNDER PRESSURE so do make sure you have eye protection, cold exhausts and a rag over the valve. Not much fuel will come out, but pays to take precautions.

[V8 Animal]

Chimjunkie said:

V8 Animal said:

Is that the black screw in thinghy on the fuel rail??

Cant say for early cars, but on mine it is a valve similar to a car tyre with a dust cap over it. Unscrew dust cap and hold a cloth over the valve whilst poking the centre bit. FUEL UNDER PRESSURE so do make sure you have eye protection, cold exhausts and a rag over the valve. Not much fuel will come out, but pays to take precautions.

As ive got the base of the plenum at the moment fuel rail on show and wondered what that thing was.
Thanks
BTW i replaced my fuel filter a year ago and had no issues with pressure lost a small drop pf petrol that's all.
Suppose you could take the cap of the filler to release pressure if tank was low.

[GreenV8S]

V8 Animal said:

BTW i replaced my fuel filter a year ago and had no issues with pressure lost a small drop pf petrol that's all.
Suppose you could take the cap of the filler to release pressure if tank was low.

It depends how recently the engine was run, and how well the pump and pressure regulator hold pressure. Sometimes they can hold pressure for days, other times the pressure dissipates within seconds. So you must assume that it's under pressure and a few cc of petrol is going to hit you in the face.

[Pushrod-Power]

Just run the motor with one of the terminals disconnected off the fuel pump until it conks out,that should lower it to a safe to disconnect fuel line pressure

[tvralfagtv6]

Safety first ,carefully does it, eg scenario petrol in face, panic disorientation mains powered inspection lamp close by = disaster waiting to happen!, those filters hold a a lot of residual petrol and you have to twist them in situ to get it out. If I personally was doing the job again I would block the filter outlets properly in situ so that no spillage can occur and find someone with a ramp so you can do it safely.

[STEV8E]

In the bible it states the procedure is similar to removing the fuel pump and that involves draining the fuel tank.

Do I take it that isn't necessary then.

I am currently working my way though a 12,000 service and this is my next job.

Cheers

Steve

[V8 Animal]

STEV8E said:

In the bible it states the procedure is similar to removing the fuel pump and that involves draining the fuel tank.

Do I take it that isn't necessary then.

I am currently working my way though a 12,000 service and this is my next job.

Cheers

Steve

Deffo not.
Don't worry it's a straightforward job just fit it the right way round.

[STEV8E]

Thanks for that Paul