The procedure....
Lubricate new 'O' rings with rubber grease and
fit to sealing grooves in thermostat housing,
coolant elbow and coolant pipe.
Fit coolant pipe into thermostat housing, ensure
clip connectors are uppermost.
Position thermostat housing and coolant pipe
above cylinder block, engage coolant pipe in
cylinder block and press thermostat housing
firmly into position. Ensure mounting flange on
thermostat housing is aligned to bolt hole in
cylinder block.
Fit coolant elbow into cylinder block, press
firmly into place. Ensure mounting flange is
aligned correctly to thermostat housing flange.
Fit bolt to coolant elbow and thermostat
housing flanges. Tighten bolt to 18 Nm