Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 245

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. TEST the system for normal operation.

PINPOINT TEST D : THE ENGINE BLOCK HEATER DOES NOT OPERATE

TEST

CONDITIONS

DETAILS/RESULTS/ACTIONS

D1: CHECK CONTINUITY OF THE BLOCK HEATER POWER SUPPLY CABLE AND THE BLOCK HEATER

Measure the resistance between the live supply terminal and the negative terminal of the block heater power
supply connector.

Is the resistance less than 20 ohms?
Yes

Repair the mains power supply to the vehicle block heater cable. TEST the system for normal operation.

No

GO to D2

. .

D2: CHECK THE CONTINUITY OF THE BLOCK HEATER

Disconnect the block heater electrical connector from the block heater.
Measure the resistance between the live supply terminal and the negative terminal of the block heater.

Is the resistance less than 20 ohms?
Yes

GO to D3

. .

No

INSTALL a new block heater. For additional information, refer to
REFER to:

Block Heater

(303-03A Engine Cooling - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal

and Installation).
. TEST the system for normal operation.

D3: CHECK THE BLOCK HEATER FOR A SHORT TO GROUND

Measure the resistance between the live supply terminal and the earth terminal of the block heater.

Is the resistance less than 10,000 ohms?
Yes

Install a new block heater. For additional information, refer to
REFER to:

Block Heater

(303-03A Engine Cooling - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal

and Installation).
. TEST the system for normal operation.

No

GO to D4

. .

D4: CHECK THE CONTINUITY OF THE BLOCK HEATER POWER SUPPLY CABLE

Measure the resistance of the live supply wire of the block heater cable.
Measure the resistance of the neutral supply wire of the block heater cable.
Measure the resistance of the ground supply wire of the block heater cable.

Is the resistance less than 5 ohms?
Yes

GO to D5

. .

No

Install a new block heater power supply cable. TEST the system for normal operation.

D5: CHECK THE BLOCK HEATER POWER SUPPLY CABLE FOR A SHORT CIRCUIT

Measure the resistance between the live supply wire and the neutral supply wire of the block heater cable.
Measure the resistance between the live supply wire and the ground wire of the block heater cable.

Is the resistance less than 10,000 ohms?
Yes

Install a new block heater power supply cable. TEST the system for normal operation.

No

Repair the mains power supply to the vehicle block heater cable. TEST the system for normal operation.

Component Tests

Pressure Test

WARNING: Never remove the coolant pressure cap under any circumstances while the engine is operating. Failure to follow this

instruction may result in personal injury.

To avoid having scalding hot coolant or steam blow out of the cooling system, use extreme care when removing the coolant pressure cap
from a hot cooling system. Wait until the engine has cooled, then wrap a thick cloth around the coolant pressure cap and turn it slowly until
the pressure begins to release. Step back while the pressure is released from the system. When certain all the pressure has been released
(still with a cloth) turn and remove the coolant pressure cap from the coolant expansion tank. Failure to follow these instructions may result
in personal injury.

1. Switch the engine OFF.

1.

2. Open the hood and install protective fender covers.

2.

3. Carefully remove the coolant pressure cap from the coolant expansion tank to relieve pressure from the cooling system. Add

coolant to the coolant expansion tank as necessary.

3.

4. Install the cooling system Pressure Tester adaptor tightly to the coolant expansion tank.

4.

5. Attach the pressure pump and gauge to the adapter fitting and pressurize the cooling system to 100 kPa (14.5 psi).

5.

6. Observe the gauge reading for approximately two minutes. The pressure should not drop during this time.

If system holds pressure, proceed to step 8.
If the pressure drops check for leaks in the cooling system. Correct any leaks found and recheck the system.

6.

7. Release the system pressure by slowly loosening the cooling system Pressure Tester adaptor. Check the coolant level and

replenish as necessary with the correct coolant solution.

7.

8. Conduct the pressure cap Pressure Test in this section.

8.

Coolant Expansion Tank Pressure Cap Pressure Test

WARNING: Never remove the coolant expansion tank cap under any circumstances while the engine is operating. Failure to follow

these instructions may result in damage to the cooling system or engine and/or personal injury. To avoid having scalding hot coolant or
steam blow out of the cooling system, use extreme care when removing the coolant expansion tank cap from a hot cooling system. Wait
until the engine has cooled, then wrap a thick cloth around the coolant expansion tank cap and turn it slowly until the pressure begins to
release, step back while the pressure is released from the system. W hen certain that all pressure has been released, (still with a cloth) turn
and remove the coolant expansion tank cap. Failure to follow these instructions may result in personal injury.

1. Remove the coolant pressure cap from the coolant expansion tank.

1.

2. Install the coolant pressure cap to the coolant system Pressure Tester.

2.

3. Operate the cooling system pressure tester. Pressurize the coolant pressure cap until the pressure relief valve in the coolant

pressure cap opens and observe the gauge reading.

• NOTE: If the plunger of the pump is operated too quickly, an erroneous pressure reading will result.

3. Compare the gauge reading with the maximum opening pressure of the coolant pressure cap: 100 KPa (14.5 psi).

3.

4. Release the pressure. Repeat Step 3 at least twice to make sure that the pressure test reading is repeatable and within

acceptable gauge reading limits of the expansion tank cap.

4.

5. If the pressure test gauge readings are not within acceptable gauge reading limits, install a new coolant pressure cap.

5.

6. Pressurize the coolant pressure cap until the pressure is just below the opening pressure of the coolant pressure cap.

6.

7. Observe the reading of the pressure gauge for one minute. The pressure should not fall within this time.

7.

8. If the pressure falls below 10 KPa (1.5 psi) of the recorded pressure, install a new coolant pressure cap.

8.

Thermostat Test, Mechanical

• NOTE: Fully open means the thermostat valve lifts a distance of 9.0 mm (0.35 inch) or more off the valve seat.

1. Remove the thermostat. For additional information, refer to

REFER to:

Thermostat

(303-03A Engine Cooling - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27, Removal and

Installation).
.

1.

2. Immerse the thermostat in water.

2.

3. Increase the temperature of the water.

3.

4. Observe the state of the thermostat and the temperature of the water.

4.

5. The thermostat should begin to open at 82°C (179°F) and is fully open at 93°C (199°F).

5.

6. If the thermostat fails to open within acceptable limits, install a new thermostat.

6.

Radiator Leak Test, Removed From the Vehicle

CAUTION: Do not leak test an aluminium radiator in the same water that is used to leak test copper/brass radiators. Flux and caustic

cleaners may be present in the test water which will corrode aluminum.

Clean the radiator before leak testing to prevent contamination of the test tank. Leak test the radiator in clean water with 138 kPa (20 psi)
air pressure.

A separate clean test tank is recommended for aluminium radiators. If a separate tank is not available for aluminium radiator testing, rinse
the test tank each time before testing an aluminium radiator.

Published: 11-May-2011

Engine Cooling - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27 - Cooling
System Backflushing

General Procedures

• CAUTIONS:

The heater core must be backflushed separately from the engine cooling system to prevent the engine cooling system particles from

clogging the heater core tubes and reducing (or eliminating) coolant flow through the heater core.

All engine cooling system flushing and backflushing procedures must include a separate backflushing of the heater core after the flushing or
backflushing of the engine cooling system.

Heater core internal pressure must not exceed 100 kPa (14.5 psi). Failure to follow this instruction may cause damage to the heater

core.

• NOTE: Cooling system backflushing should be carried out before the cooling system components are installed after the cooling system
flushing procedure.

1. Disconnect the heater outlet coolant hose from the engine and connect

the heater hose to a suitable hose pipe.

2. Disconnect the heater inlet coolant hose from the engine and allow the

coolant to drain into a suitable container.

3. Turn the water supply valve to the hose ON and allow water pressure to

flow through the heater core.

4. Allow water pressure to flow through the heater core for approximately

five minutes.

5. Turn the water supply valve to the hose OFF and disconnect the hose

pipe from the heater hose.

6. Connect the heater inlet coolant hose to the engine.

7. Connect the heater outlet coolant hose to the engine.

8. Fill the cooling system as described using a 50% mixture of Jaguar

Premium Cooling System Fluid, or equivalent meeting Jaguar
specification ESE-M97B44-A and 50% distilled water.

9. Test the system for correct heater performance with the specified

engine cooling system conditions.

Radiator Backflushing

1. Remove the radiator. For additional information, refer to

Radiator

.

2. Invert the radiator.

3. Connect a suitable hose pipe to the lower coolant hose connection of

the radiator.

4. Turn the water supply valve to the hose ON and allow water pressure to

flow through the radiator.

5. Allow water pressure to flow through the radiator for approximately five

minutes.

6. Turn the water supply valve to the hose OFF and disconnect the hose

pipe from the radiator.

7. Allow the coolant to drain from the radiator.

8. Install the radiator. For additional information, refer to

Radiator

.

Engine Backflushing

• NOTE: Make sure that the thermostat is removed before backflushing the engine.

1. Position the high-pressure water hose into the engine through the

engine return and backflush the engine.

2. Connect a suitable hose pipe to the upper coolant hose connection of

the engine.

3. Turn the water supply valve to the hose ON and allow water pressure to

flow through the engine.

4. Allow water pressure to flow through the engine for approximately five

minutes.

5. Turn the water supply valve to the hose OFF and disconnect the hose

pipe from the upper coolant hose connection of the engine.

6. Connect the upper coolant hose to the engine.

7. Fill the cooling system as described using a 50% mixture of Jaguar

Premium Cooling System Fluid or equivalent, meeting Jaguar
specification ESE-M97B44-A and 50% distilled water.

Published: 11-May-2011

Engine Cooling - 2.0L NA V6 - AJV6/2.5L NA V6 - AJV6/3.0L NA V6 - AJ27 - Cooling
System Draining, Filling and Bleeding

General Procedures

• W ARNINGS:

Never remove the coolant pressure cap under any circumstances while the engine is operating. Failure to follow this instruction may

result in personal injury.

To avoid having scalding hot coolant or steam blow out of the cooling system, use extreme care when removing the coolant pressure cap
from a hot cooling system. Wait until the engine has cooled, then wrap a thick cloth around the coolant pressure cap and turn it slowly until
the pressure begins to release. Step back while the pressure is released from the system. When certain all the pressure has been released
(still with a cloth) turn and remove the coolant pressure cap from the coolant expansion tank. Failure to follow these instructions may result
in personal injury.

To avoid the possibility of personal injury, do not operate the engine with the hood open until the fan blades have been examined for

cracks and separation. Failure to follow this instruction may result in personal injury.

• CAUTIONS:

Do not run the engine without first making sure the engine cooling fans operate. Start the engine, set air conditioning (A/C) to

maximum cold, set the blower motor to maximum and observe that the engine cooling fan operates. Failure to follow this instruction may
cause damage to the engine.

The engine cooling system must be maintained with the correct concentration and type of anti-freeze solution to prevent corrosion

and frost damage.

Do not RUN the engine with the coolant pressure cap removed. Failure to follow this instruction may cause damage to the engine.

Do not RUN the engine without the correct level of coolant. Failure to follow this instruction may cause damage to the engine.

1.

W ARNING: Relieve the cooling system pressure by unscrewing the

coolant pressure cap.

Remove the coolant expansion tank pressure cap.

2. Remove the undertray. For additional information, refer to Section

501-02 Front End Body Panels

.

3. Remove the coolant drain plug.

Drain the coolant into a suitable container.