Group 22 Service procedures - cooling system
141
8
Tap the sealing ring in with the drift until the drift bottoms
against the thermostat housing.
9
Fit the thermostats and O-rings.
10
Fit the thermostat housing.
11
Fit the pipe between the coolant pump and thermostat hous-
ing with seals.
12
Fit the pipes between the thermostat housing and the upper
radiator hose.
13
Fill with coolant.
14
Perform a leakage test.
Sleeve thermostats, checking
A function check of the old thermostat must be carried out
before fitting a new one. Thermostats are removed according
to the instructions shown under “Sleeve thermostats, replac-
ing”.
1
Check that the thermostat has closed fully. This can be done
by holding it up against the light. There must be no visible
gap. If the thermostat does not close properly, replace it.
2
Heat water in a receptacle to:
TAD1630G, TAD1631G, TD164KAE 75°C (167°F)
Others 70°C (158°F)
Immerse the thermostat in the receptacle as illustrated.
3
Check after at least 30 seconds that the thermostat is still
closed.
4
Now heat the water to boiling point (100°C (212°F). Check
after at least 30 seconds at boiling point that the thermostat
has opened at least 9.5 mm (0.374").
If the thermostat does not open, replace it.
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