Dont forget the fuel pump alignment. If you have the cover off, then you can check and see whether the fuel pump is aligned at the same time that the front hub line is at 3 oclock.

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Grid power- the one true essential

2005 Liberty CRD- ARP studs, Fumoto, Hayden FC, inline Tstat, ETechno 7v GP, Platinum P1, in-tank lift pump.
1983 Volvo D24T
1981 Volvo D24
Dodge Cummins TD
Case 580B
Mitsubishi MT180 diesel
Kubota BX25 diesel

He needs to take the entire inner cover off to replace the rockers. Fuel pump can be rotated directly to the timing mark on the inner cover (approximately at the 8 o'clock position) at some point during the process.

When rotating the engine BY HAND during reassembly, remember that the fuel pump will only match its timing mark every 3rd rotation - So to have the two cams, the crank, and the fuel pump all back to their starting positions at the same time - the engine must be rotated 6 full revolutions.

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Proud supporting vendor of LOST Jeeps
TRAVELING CRD TECH. I come to you!
Need help? Just ask! I've taken it apart more than most.
Email jeep [at] maincomputer [dot] com - BOARD MESSAGING IS BROKEN
Over 225 CRDs currently driving with my valves, timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.

OK, I finally got to the Libby
I will post pics but need approval.
Very clear why it would not run.

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2006 CRD

All the talk about aligning the pump makes me laugh. I did one customers CRD aligning the pump and mine purposely misaligning the pump and they both run great. Go ahead and keep posting this misinformation I need a laugh sometimes.

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2006 Black Jeep Liberty CRD Limited
K&N, Samco Hoses, Michelin 245/70-16 LTX A/T2, Fumoto F-102, V-Force Muffler, Mopar, Hitch, Trailer Wiring, Skid Plates, Slush Mats, Rear Shelf, Predator Stage 1, Transgo, ORM & CodeReader, Facet 40109 Pump
"IT'S A DIESEL THING, YOU WOULDN'T UNDERSTAND"
Certified Services Auto & Truck Repair

That mark is there for a reason. Others have stated the reason, and I concur. I won't get into the why or how's of it. Ask Bosch or any diesel mechanic why... To each their own I suppose... but it is not "misinformation."

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Mike Rausch
Bear, Delaware
2006 Liberty Sport CRD 253K

I bet if you put it on dyno you'll see a small difference. I had it misaligned when I did the timing belt due to lack of tools, not by much though, and "fixed" it after a while. Either my mind is playing games, either the car runs a bit smoother and more responsive.

But overall I agree, that's why this engine is common rail, rail holds pressure and injectors open and leave fuel through, shouldn't matter when the pressure peak is delivered from the pump as in theory the rail should have a constant pressure. Some folks stated that there are some pressure peaks in the cp3 pump that do matter for continuous optimal pressure on the rail, and that's why it needs to be aligned. Honestly, as a principle, I don't really get it either why it needs to be on the sign. Unless, the fuel volume in the rail is so small and pressure drops significantly when an injector opens, that the timing on when to pressurize back the rail is very important... In this case, I can see a reason.

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.

If true timing it would be in time first revolution, 33.3 percent off the second revolution and 66.6 percent off the third because we are also dealing with a 4 cylinder. Don't make no different if there is a pulse because head pressure will stay the same.

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2006 Black Jeep Liberty CRD Limited
K&N, Samco Hoses, Michelin 245/70-16 LTX A/T2, Fumoto F-102, V-Force Muffler, Mopar, Hitch, Trailer Wiring, Skid Plates, Slush Mats, Rear Shelf, Predator Stage 1, Transgo, ORM & CodeReader, Facet 40109 Pump
"IT'S A DIESEL THING, YOU WOULDN'T UNDERSTAND"
Certified Services Auto & Truck Repair

I've been wondering about this myself. The fuel timing is regulated by the ECM via the solenoids on top of the injectors. The common rail is constantly supplied with pressure regulated fuel.

It would be tantamount to timing the water pump.

I think the timing marks are casting holdovers from the 2.5L and other variations.

I think I'm right, unless of course I'm wrong.

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2005 Jeep Liberty CRD Limited 139K
Mods: ARP Studs, New Rocker Arms 98K, Bosch 5V, Racor fuel filter with 2 Micron Filter, Mr. Gasket diesel lift pump, Rear air/fluid shocks, GDE Eco Full Tune/ Eco Trans Tune

1993 GMC Sierra SLE K3500 6.5L 228K and clicking away

Partially true... But we miss lots of data to make a fair assessment... For example, at 2000 rpm, the crankshaft should spin 2000 times/minute. That means for 1 rotation, only one injector pulverizes an amount of fuel. I do not recall on the top of my head how many degrees (0 to 360) the fuel pump pulley spins with one crank rotation. I'm not disagreeing with you, I'm just saying it could be possible that the peak of the pump pressure to the rail could be just a tad before the injector opens, ensuring the optimum pressure in the rail right before injector would need it. Again, we don't have the complete data to make a fair assessment. Maybe someone more knowledgeable can chip in with more info.

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.

If I remember from speaking to GDE, it was said that the fuel injectors could open when the pump wasn't fully pressurized, and there would be less fuel delivered at the moment it was needed. Still fuel, but not enough.

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2005 Black KJ Sport CRD,
GDE Full Torque ECO TUNE, GDE Transmission ECO Tune,
Samco British Racing Green Hoses
Build Date 1/05
200k miles.
Original Owner

Positive displacement pump

A positive displacement pump makes a fluid move by trapping a fixed amount and forcing (displacing) that trapped volume into the discharge pipe.
Some positive displacement pumps use an expanding cavity on the suction side and a decreasing cavity on the discharge side. Liquid flows into the pump as the cavity on the suction side expands and the liquid flows out of the discharge as the cavity collapses. The volume is constant through each cycle of operation.

Positive displacement pump behavior and safety[edit]

Positive displacement pumps, unlike centrifugal or roto-dynamic pumps, theoretically can produce the same flow at a given speed (RPM) no matter what the discharge pressure. Thus, positive displacement pumps are constant flow machines. However, a slight increase in internal leakage as the pressure increases prevents a truly constant flow rate.
A positive displacement pump must not operate against a closed valve on the discharge side of the pump, because it has no shutoff head like centrifugal pumps. A positive displacement pump operating against a closed discharge valve continues to produce flow and the pressure in the discharge line increases until the line bursts, the pump is severely damaged, or both.
A relief or safety valve on the discharge side of the positive displacement pump is therefore necessary. The relief valve can be internal or external. The pump manufacturer normally has the option to supply internal relief or safety valves. The internal valve is usually only used as a safety precaution. An external relief valve in the discharge line, with a return line back to the suction line or supply tank provides increased safety.

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2006 Black Jeep Liberty CRD Limited
K&N, Samco Hoses, Michelin 245/70-16 LTX A/T2, Fumoto F-102, V-Force Muffler, Mopar, Hitch, Trailer Wiring, Skid Plates, Slush Mats, Rear Shelf, Predator Stage 1, Transgo, ORM & CodeReader, Facet 40109 Pump
"IT'S A DIESEL THING, YOU WOULDN'T UNDERSTAND"
Certified Services Auto & Truck Repair