L322 TD6 L322 High Pressure Pump Fail / Repair

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RS2000CUSTOM

Active Member
It has been many many moons since I last had any issues with my TD6

BUT

like most things they eventually break !

So heres what happened

I noticed a slight increase in cranking to start engine from either warm or cold - this was only an extra second or two

Driving normal 30mph round town no difference at all

Try to make a quick get away and I could feel a tiny flutter in the revs

So decided to go onto local by-pass and gunned it in Sport Manual mode :p Well 1st 2nd 3rd and then PING PING PING PING - Engine stopped and total non-start - whoops :rolleyes:

Fuel System Fault on display and had to get a mate to recover me :(

Under side of engine dripping wet with pure clean diesel

Back to my workshop and quickly identified leak from High Pressure pump :(

So off I went to consult the Range Rover workshop .pdf, Google, Ebay and Youtube

Off to a local Motor Factors who advertise on Ebay who supplied me with a pump removal / cam chain gear holding tool - £20 :D Bargain

Then let the strip down begin

Detach bonnet struts and lock bonnet in upright position using the tabs on the bonnet hinges

Viscous fan and cowing off

Drain coolant

Rear bulkhead panel off

Inlet manifold off

Partially remove and move away the plastic coolant hose that goes directly over the HP pump

The pump is then clear to remove (no really it is that easy once tha above removed)

Remove blanking plug on front timing chest that covers the HP pump nut

Fit £20 tool which consists of a collar (fit this first) remove nut which is not very tight and then fit support tube through centre of collar

Remove the 3 HP pump nuts but remember to put a piece of masking tape across socket opening to "grab" the lowest nut so it doesnt drop into engine bay

Remove the HP pump to rail metal pipe and the feed and return hoses

HP Pump is NOT "timed" so it does not matter what position the engine is in when removing the pump

Screw bolt into the removal tool and carefully tighten which then releases the pump from the gear which is tapered

A bit of wiggling around and pump is out !!! :cool:

Clean exterior of pump

Then watch YOUTUBE VIDEO's as they are very informative !



Buy a seal kit I paid £16.20 :bow: (cheapest parts bill for an L322 Range Rover)

Failed seal that caused all the grief is pictured next to the 50p

Now I know you are all not going to have access to test equipment but even though I trust my own repair work I still went to a diesel specialist and paid then £20 to pressure test and cycle the pump throughout its working pressure range - 1350 Bar :eek:

Refit and restart engine (doesnt even need bleeding) - check for leaks - NONE :D:D:D:D

Hope this quick write-up helps others

Only special tool required is the cam gear holder / pump removal tool

You dont even need to jack up the vehicle or use a pit or ramp

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Hi,
all can any body help with this problem a few weeks ago car broke down with fuel injection system fault, got car recovered to garage who said it was hp pump and after giving me a heart attack with price,I got the car recovered back to me and after a couple of post on here set about and removed pump myself once removed of I went to P Atkins Diesel Fuel Injections Specialists. who informed me at some point (previous to me owning car) that pump at had really poor repair, without using right o rings etc so they repaired pump and put in new shaft,old one had groove worn in it, full test which they ran up to 1350 bar.
so back home set about refitting, put everything back together car started first time great :) ??
did a few trips out no problem then a couple of days ago out and about car cut out at traffic lights got code reader out reset codes did not read codes just wanted to get off light, turned key started of I went 100 mile trip never missed a beat, till today on my way back a few miles car cut out busy busy road clear codes off I went for forty miles :( and again so bit more time plugged Using in againUsing bearmach codes were
DTC 1190 fuel pressure plausibility
DTC 9f6 fuel pressure monitoring whilst starting
DTC fuel low pressure control
cleared codes and got home any HELP! would be great
 
Hi,
all can any body help with this problem a few weeks ago car broke down with fuel injection system fault, got car recovered to garage who said it was hp pump and after giving me a heart attack with price,I got the car recovered back to me and after a couple of post on here set about and removed pump myself once removed of I went to P Atkins Diesel Fuel Injections Specialists. who informed me at some point (previous to me owning car) that pump at had really poor repair, without using right o rings etc so they repaired pump and put in new shaft,old one had groove worn in it, full test which they ran up to 1350 bar.
so back home set about refitting, put everything back together car started first time great :) ??
did a few trips out no problem then a couple of days ago out and about car cut out at traffic lights got code reader out reset codes did not read codes just wanted to get off light, turned key started of I went 100 mile trip never missed a beat, till today on my way back a few miles car cut out busy busy road clear codes off I went for forty miles :( and again so bit more time plugged Using in againUsing bearmach codes were
DTC 1190 fuel pressure plausibility
DTC 9f6 fuel pressure monitoring whilst starting
DTC fuel low pressure control
cleared codes and got home any HELP! would be great
Worth looking at the in tank pump and the intermediate pump which is a common failure item.
 
Hi, Datatek
Had the pump outside tank done and fuel rail pressure sensor (sensor Land Rover Part) done early this year when I broke down with same thing fuel injection system fault, was wondering if faulty sensor ?? as car always starts when I clear faults
 
Hi, Datatek
Had the pump outside tank done and fuel rail pressure sensor (sensor Land Rover Part) done early this year when I broke down with same thing fuel injection system fault, was wondering if faulty sensor ?? as car always starts when I clear faults
Anything is possible, needs diagnostics but still worth checking the in tank pump.
 
Be worth checking the fuel pressures with a diag unit. should have around 5 bar ign on if both electric pumps are ok.
when cranking I think it wants about 300 bar.
Have a look at the pressure relief valve on the back of the HP pump. If the o rings are split then all the high pressure is sent back to the tank on the return line.
 
HP pump just been rebuilt only put back on 3 days before Christmas that was all checked and passed i'll check with live data again for pressures which i'm sure was ok
 
Some photos of live data
 

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Are you getting good flow to the fuel filter connection and from filter to HP pump? If so, I doubt it is the in tank pump or in line pump. Pre-supply pressure (which is the pressure at the fuel filter) is 3.6bar which is 'OK' anything less than 2.8 and I would suggest it is a supply problem and above 4.0 is 'great' so 3.6 is in the ballpark of being a good supply pressure.

As mentioned above, have you had the regulator off to check the seals?

EDIT: Have you done an Injector Leakk Off test? I had issues on my M57 powered BMW 530d and it ended up being excessive leak off from 2 injectors causing the rail pressure to drop and prevent starting and once running, prevent acceleration.

As per: https://forum.bmw5.co.uk/topic/139223-2003-530d-se-touring-cranks-but-not-starting/
 
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Hi Ant,
Can't get leak off test done till next week, I have no trouble starting or with acceleration it's just these 3 times since rebuilt HP pump fitted just cut out, 1st time no dash warning, 2nd and 3rd time cut out then ping ping fuel injection system
Thanks
Sean
 
Just done basic leak off test removed leak off pipes,ignition on position 2 pumps kick in waited for pumps to shut down no leak off at all, replaced everything to car for test drive no acceleration problems, no kick down issues like a rocket, :confused: but next time out it may just cut out again
 
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