E 300D (210.020) L6-3.0L DSL (606.912) (1996)
Thermostat: Service and Repair
NOTE: Numbers in parentheses ( ) indicate a component or tool in the associated illustration.
REMOVAL
WARNING:
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Risk of scalding as a result of hot coolant spraying out
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Open cap of expansion reservoir or radiator (2)
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Do not open the cap of the expansion reservoir or radiator unless the coolant temperature is below 90°C.
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Carefully turn cap to the first detent or slowly about 1/2 turn.
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Wear protective clothing.
1. Drain coolant, refer to Draining/Filling Cooling System.
2. Remove coolant thermostat housing (17)
3. Remove coolant thermostat (20)
INSTALLATION
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Install in the reverse order, noting the following:
The recess at the coolant thermostat (20) must be aligned with the rib on the coolant thermostat housing (17) (arrow)
Replace O-ring (19)
Check cooling system for leaks, refer to Test System For Leaks. See: Testing and Inspection