XJR (X300) L6-40L SC (AJ16) (1995) Coolant: Reduced Heater Output Temperature
Technical Service Bulletin # 14-13
Date: 971001
Heater - Reduced Output Temperature
14-13
Sedan Range
DATE
8/97
Amended 10/97
Poor Heater Performance - Coolant Specification Change - Replace Coolant & Heater Core
MODEL
1995-97 MY Sedan Range
VIN
720001-803241
Remove and destroy Bulletin 14-13, dated 8/97.
Replace with this Bulletin.
Warranty revisions are marked with a bar and in bold text.
ISSUE:
Some Sedan Range vehicles within the above VIN range which were filled with the blue green coolant in production, may experience reduced coolant
flow through the heater core as a result of deterioration of the coolant.
Starting with VIN 803242 an improved coolant Jaguar D542, which is yellow in color has been used in production to correct this condition.
ACTION:
In case of a customer complaint only of reduced heater output temperature on a Sedan Range vehicle within the above VIN range, perform the following
procedure:
^
Verify the Customer's concern by performing the Heater Core Coolant Circulation Test described.
^
Drain and discard the existing antifreeze as described.
^
Flush out the cooling system twice with plain clean water.
^
Replace the heater core.
^
Refill the cooling system, using Jaguar Antifreeze D542.
Heater Core Coolant Circulation Test
Perform the following test to verify that the climate control system is unable to produce a heater outlet duct air temperature exceeding 40°C (104°F)
before replacing the heater core.
1.
Run the engine at approximately 2000 rpm until "Normal" coolant temperature is reached.
2.
Press red arrow on the climate control system panel repeatedly until the display changes to HI. Turn the fan knob clockwise until the fan speed bar
graph shows the maximum fan speed.