XJR (X308) V8-4.0L SC (AJ26) (1998)
Thermostat: All Technical Service Bulletins
Cooling System - Thermostat Sticking Closed
303-25
DATE
4/98
V8 XJ Series/XK8
MODEL
1997 MY-ON XK8 Range
1998 MY-ON V8 XJ Series
VIN
001001-ON
812256-ON
Thermostat Sticking Closed - Improved Thermostat Introduced
Issue:
A revised coolant thermostat for V8 engines has been introduced to solve complaints of thermostats sticking in the closed position.
The new thermostat has been introduced in production from Engine No.
980312****. This approximates to:
V8 XJ Series
VIN 836874
XK8
VIN 025596
Action:
Install the latest design thermostat, part no. AJ8 1328, in the case of a thermostat sticking closed on vehicles prior to the above VINs. Do not use the
earlier design, part no. NCA 2244BA.
Note that the "UP" arrow on the earlier thermostat has been deleted on the improved thermostat. Install the thermostat with the "Jiggle pin" at the highest
point.
Parts Information: