TECHNICAL BULLETIN
LTB00352NAS4
12-DEC-12
ISSUE '4' CHANGES ARE NOT HIGHLIGHTED
SECTION: 303

Engine Coolant Leak at Coolant Pump
AFFECTED VEHICLE RANGE:
LR4 (LA)
Range Rover Sport (LS)

Range Rover (LM)

VIN: AA510742-Onwards
Model Year: 2010-Onwards
VIN: AA212147-BA299999
BA700000-Onwards
Model Year: 2010-Onwards
VIN: AA304426-CA399999
Model Year: 2010-2012

CONDITION SUMMARY:
Situation: The fluid level in the engine coolant system expansion tank may fall below the minimum level over
a period of time or a ‘Low coolant level’ message is displayed in the message center. Upon inspection, a leak
may be found to be from the front of the engine-driven coolant pump together with excessive wear of the
coolant pump bearing.
NOTE: The coolant pump can display some dry coolant residue on the pump body and surrounding
area during normal operation. A small amount of coolant may temporarily weep through the pump
seals or from the evaporation chamber. This does not affect the operation of the pump or the cooling
system and does not damage the coolant pump. A small amount of dry coolant residue on the pump
body, pulleys, belts, or around the front of the engine is not alone sufficient justification for changing
a coolant pump.
Cause: This may be caused by coolant ingress into the coolant pump bearing housing, leading to corrosion of
the bearing and incorrect support for the impeller shaft, leading to accelerated wear of the mechanical flat-face
of the seal and a coolant loss sufficient to display the warning message.
Action: In the event of a customer concern of the above, refer to the Repair Procedure outlined below.

PARTS:
No parts necessary

TOOLS:
Refer to Workshop Manual for any required special tools

WARRANTY:
NOTE: Repair procedures are under constant review, and therefore times are subject to change; those
quoted here must be taken as guidance only. Always refer to DDW to obtain the latest repair time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a
quantity of zero.

NOTE: The information in Technical Bulletins is intended for use by trained, professional Technicians with the knowledge, tools, and
equipment required to do the job properly and safely. It informs these Technicians of conditions that may occur on some vehicles, or
provides information that could assist in proper vehicle service. The procedures should not be performed by 'do-it-yourselfers'. If you are
not a Retailer, do not assume that a condition described affects your vehicle. Contact an authorized Land Rover service facility to
determine whether this bulletin applies to a specific vehicle.
© Jaguar Land Rover North America, LLC
555 MacArthur Boulevard
Mahwah, NJ 07430

DESCRIPTION

SRO

TIME
(HOURS)

CONDITION
CODE

CAUSAL PART

Coolant pump bearing diagnostics - LR4

26.50.89.27

0.30

42

LR010801

Coolant pump bearing diagnostics - Range Rover Sport

26.50.89.27

0.40

42

LR010801

Coolant pump bearing diagnostics - Range Rover

26.50.89.27

0.30

42

LR010801

Coolant pressure test - All

26.10.07

0.20

42

LR010801

Normal Warranty policies and procedures apply
REPAIR PROCEDURE
NOTE: The coolant pump can display some dry coolant residue on the pump body and surrounding
area during normal operation. A small amount of coolant may temporarily weep through the pump
seals or from the evaporation chamber. This does not affect the operation of the pump or the cooling
system and does not damage the coolant pump. A small amount of dry coolant residue on the pump
body, pulleys, belts, or around the front of the engine is not alone sufficient justification for changing
a coolant pump.
1.

NOTE: Acceptable Coolant Pump Witness Marks
Check the coolant pump for witness marks before continuing.
• Note the severity of any witness marks on the repair order.

2. Check the expansion tank level and message center for a low
coolant warning; record on the repair order.
• If there is low coolant in the expansion tank and or a low
coolant message from the message center, continue to next
step.
• If a leak is located this must be claimed as a separate claim.
3. Top up the coolant to the correct level.
4.

NOTE: A 1.0-1.5 PSI pressure drop is normal, and
does not indicate a system leak. An air leak may also be
present in the pressure test equipment.
Carry out a cooling system pressure test to 1 bar (15PSI)
pressure test the system for 5 minutes.
• Record the pressure drop (if any) on the repair order.

• If there is a cooling system pressure drop of more than 1.5
PSI, then investigate the system for fresh wet leaks and
record on a repair order. A UV light may be helpful as there
is a UV dye in the coolant.
• If there is fresh wet coolant dripping from the pump – this
indicates a leak. Coolant residue is normal and does not
indicate a leak.
5. If no leak is found starting the engine from cold, listen for
unusual noise (moaning, groaning, rumbling, grinding); record
results on the repair order.
6. Stop the engine; slacken the FEAD belt tensioner and slip the
FEAD belt to one side.
7. Hold the coolant pump pulley firmly and rock it up and down
by hand.
• Feel for excessive play.
• Rotate the pulley ¼ turn and repeat the rocking motion a few
times.
• Record results on the repair order.
8. Spin the pulley and feel for roughness.
• Record results on the repair order.
9. If there is excessive play in the pulley bearing, refer to
Workshop Manual section 303-03 and replace the coolant
pump; to be carried out as a separate claim.