BMW 5251 Service Manual page 122

I
Cylinder Head Removal and Installation
4
Drain engine coolant and remove coolant hoses:
Remove expansion tank cap on radiator.
Place a 3 gallon pail beneath engine to capture coolant
Remove coolant drain plug (arrow) located on exhaust
side of cylinder 2 of engine block.
4
Drain radiator into a 3 gallon pail by removing plastic drain
plug (arrow) completely.
Use caution when draining and disposing of engine coolant.
Coolant is poisonous andlethal to humans andpets. Pets are
attracted to coolant because of its sweet smell and taste.
Seek medical attention immediately if coolant is ingested.
NOTE-
Catch and dispose of drained coolant according to local,
state, and federal laws.
4
Remove thermostat housing:
.
Disconnect electrical harness connector at thermostat
housing. .
Remove hoses from thermostat hous~ng by releasing loclts
(arrows).
Unbolt (4 bolts) and remove thermostat hous~ng.
-
On vehicles equipped with mechanical cooling fan: Remove
belt-driven cooling fan and radiator shroud as described in
170 Radiator and Cooling System.
CAUTIOI\C
32 mm radiator fan mounting nut has left hand threads.
r
4
Remove fasteners (arrows) from heater bypass tube. Pull
tube out of cylinder head and set to side, leaving heater hose
connected.
-
Unbolt power steering fluid reservoir and pull aside without
disconnecting hoses. Secure to fender with cord or stiff wire.