Jeep 1997 Grand Cherokee Service Manual page 267

COOLANT TEMPERATURE SENSOR
ZG
REMOVAL AND INSTALLATION (Continued)
(2) Drain coolant from radiator. Refer to Draining
Cooling System in this group.
(3) Raise vehicle.
(4) Remove engine cylinder block drain plug(s)
located on the sides of cylinder block above the oil
pan rail (Fig. 59) (Fig. 60).
Fig. 59 Drain Plug—4.0L 6-CylinderEngine
Fig. 60 Drain Plugs—5.2/5.9L V-8 Engines
(5) Remove power cord from block heater (Fig. 61)
(Fig. 62).
(6) Loosen screw at center of block heater. Remove
heater assembly.
INSTALLATION
(1) Thoroughly clean cylinder block core hole and
block heater seat.
(2) Insert block heater assembly with element loop
pointing down.
BLOCK DRAIN PLUG
BLOCK DRAIN
PLUG
BLOCK ENGINE LOWER POWER C ORD POWER CORD LOCA- TION HEATER BLOCK
Fig. 61 Block Heater—4.0L Engine
Fig. 62 Block Heater—5.2/5.9L Engines
(3) With block heater fully seated, tighten center
screw to 2 N·m (17 in. lbs.) torque.
(4) Fill cooling system with recommended coolant.
Refer to Refilling Cooling System section in this
group.
(5) Start and warm the engine. Check for leaks.
BELT REPLACEMENT/ADJUSTMENT
NOTE: The belt routing schematics are published
from the latest information available at the time of
publication. If anything differs between these sche-
matics and the Belt Routing Label, use the sche-
matics on Belt Routing Label. This label is located
in the engine compartment.
BLOCK HEATER
COOLING SYSTEM 7 - 39