Thread: Advice needed on fitting a diesel fuel filter

this'll be fun....

most of the fuel filters are not rated for use in fuel lines that are pressurised to the pressures that are used by modern common rail engine that use an intank pump to get the fuel up to pressure for delivery to the injectors.

if the seal lets go it wont take long for the intank pump to empty the tank.

If your going top put it on the LP side of the system Id want it as close to the pump as possable so that it minimises the prime time during which the HP side of the pump will be running dry you may even want to consider getting one with a prime button on it for when you do need to bleed it so you can get fuel up without having to run the pump. the HP side does not like being run dry.


Best of luck with it tho.

Thanks Dave
I'll pass on the info, and he can discuss it with the diesel fitters .
But I'm puzzled .
John's ordered the filter from a truck supply company, and they said it would suit a D3 .
I don't know trucks, but wouldn't the new, modern turbo diesel trucks use high pressure systems ?
And wouldn't their filters therefore be high pressure ?

Cheers John

nope the fuel system on trucks works thusly

tank-sedimentor (if fitted)-first filter-lift pump-second filter (optional) final filter-fuel injector pump-return to tank.... (naturally the injector pump pushes the fuel into the injectors and they return...

trucks have to go long and hard. so they use a very agricultural high flow low pressure pump to shift the fuel into the FIP and the the FIP takes care of the rest...

some trucks have 2 distinct fuel systems the first part is the low pressure side which is what I like to call the chassis side and it simply provides fuel to and circulates the fuel to the engine side fuel system which is usually a small tank that feed the more delicate engine side of the fuel system...

I copied the idea for fozzys WVO preheat system from this concept.