Reply With QuoteThere is a strainer under the FPR which IMO is good enough, part nr. 5 Allbrit.de - Ersatzteile fur LAND ROVER & MG ROVER
Master
Has anyone fitted a inline fuel high pressure fuel filter to a td5?
As i was looking at putting a fuel cooler on Air to Air type after the initial fuel cooler and found that the high pressure from the fuel pump to the injectors does not have any filters other then those on the fuel pump,
So ether the fuel pump filters should be replaced regularly or the injectors are not very fine on tolerances, i know Cat with the unit injector engines have a 2 micron filter before the injectors on the pressure side.
So i am thinking of fitting a cat fuel filter to the pressure side of the fuel pump if possible,
then after that prob get the injectors rebuilt since one is a bit dribbley and after find out how the filter system is i know why now
YarnMaster
There is a strainer under the FPR which IMO is good enough, part nr. 5 Allbrit.de - Ersatzteile fur LAND ROVER & MG ROVER
Discovery Td5 (2000), manual, tuned
YarnMaster
SubscriberAnd the one behind the drivers side rear wheel?Originally Posted by lyonsy
D2a Td5 Manual, Chawton White. aka "Daisy"
Build date 11th Oct 2003
Freelander 2 2011, manual, the daughter calls it Perri
Before I had a Land Rover I did not have any torque wrenches. Now I have three.
LROCV #1410
AT RESTAnd there's also a gauze filter in the fuel block assembly as mentioned earlier I see. If there's a need for even more filters, then either the vehicles piping is corroded inside and might need a fuel system cleaner put though it and a rethink of where you are sourcing your fuel from.
I wonder if a fuel pump will fail earlier if it has to work harder with more restrictive devices to pump fuel through akin to a heart having to work harder to pump through clogged arteries.? I'm not a scientist, just a thought.
TD5 additional fuel filtration/ 2nd fuel filter.
YarnMaster
That's only on low pressure circuit and return ...the HP line goes directly to the head
Discovery Td5 (2000), manual, tuned
YarnMaster
SubscriberThe low pressure goes from the filter into the high pressure? So the fuel is filtered before it goes into the high pressure part of the pump ergo the high pressure line is filtered. Albeit in a round about manner. So no need for an additional inline filter.
D2a Td5 Manual, Chawton White. aka "Daisy"
Build date 11th Oct 2003
Freelander 2 2011, manual, the daughter calls it Perri
Before I had a Land Rover I did not have any torque wrenches. Now I have three.
LROCV #1410
Master
Going of this that i found here aulro byThe low pressure goes from the filter into the high pressure? So the fuel is filtered before it goes into the high pressure part of the pump ergo the high pressure line is filtered. Albeit in a round about manner. So no need for an additional inline filter.from what i can see the filter has a low pressure side filter but cant see if that feeds directly onto the high pressure side or just back to tank.Mturri
as for extra strain on the fuel filter that should be minimal as the filter i was going to use the 1r0749 is quite large ar just over a foot long and even if it was blocked up there should still be enough filter medium to left to not cause too much pressure build up in the system.
and even if it does drop the pressure to the fuel regulator so long as its above 4bar then the fuel pump and fuel pressure regulator wouldn't know the difference as the fuel pump operates at around 6-7 bar and the regulator pulls it down to 4 bar.
so does anyone have a diagram of the fuel system on the fuel pump so we can see if the low pressure feeds the high pressure?
btw strainers are generally only there to catch larger debre from something that has failed like a fuel hose breaking down or a pump that's failed as they generally don't filter down more then 40 micron and most around the 100 micron mark
YarnMaster
SubscriberIt makes sense to feed the high pressure side, just going back to the tank does not make sense. Then again I'm not a Land Rover engineer.
D2a Td5 Manual, Chawton White. aka "Daisy"
Build date 11th Oct 2003
Freelander 2 2011, manual, the daughter calls it Perri
Before I had a Land Rover I did not have any torque wrenches. Now I have three.
LROCV #1410
Master
if everything made sense on a landrover they would probably be called land cruiser's
Master
so with a bit of digging through the graves and found this
Blknight.aus in the td5 application as designed? yes
did it have to be designed that way? no
the low pressure pump in the td5 style application serves to (in no particular order)
1. provide a positive feed of fuel to the high pressure pump
2. provide an excess of fuel to the high pressure pump to keep the swirl chamber full and to cool the pump
3. provide a low pressure fuel flow through the fuel filter to reduce the chances of filter blow through
4. provide excess fuel flow to allow a continuous progressive total filtration of the fuel in the tank to assist in the reduction of in tank contaminants.
is there better ways of doing it? yes but thats subjective to your definition of the term better. I personally think that with the exception of the design and location of the filter its a reasonable design compromise for the overall requirements of the fuel system.
Replacing Td5 fuel pump with Bosch 044 inline pump
soit looks like you are correct in that the low pressure does feed the high pressure after going through the filter, then the fuel coming back from the engine looks like it goes through the filter as well.Bohica
so with that depending if i can find the space i might add a 2nd fuel filter to help and assist the single filter and there has been a how to done on here,
and ill probably add a fuel cooler after the std fuel cooler just to help lower temps as while it is bring the fuel back from probably around 150degC to 70 if i can get it down to 10degC above ambient that would be even better
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