12
112 Workshop Manual, TSD3450E, Issue 1
2800
Cooling system
To inspect Operation 12-1
Inspect visually the cooling system before any tests are performed.
Notes:
l Inspect the coolant pump seals. A small amount of leakage of coolant across the surface of the face seal
in the water pump is normal. Its purpose is to provide lubrication for the seal.
l There is a hole in the water pump body to allow coolant to drain. Small amounts of coolant might be seen
to leak intermittently from the drain hole during the engine operation cycle.
l Signs of a small leakage through the drain hole are not an indication that the pump is faulty. Coolant stains
or intermittent drops of coolant from the hole, indicate normal operation of the pump.
1 Check the coolant level in the cooling system.
Warning! On a hot engine release the filler cap carefully as the system will be under pressure.
2 Check for leaks in the system.
3 Ensure that the air flow through the radiator is not restricted. Check for bent fins in the radiator and also for
large deposits of dirt or debris.
4 Inspect the drive belts for the fan.
5 Check for damage to the fan blades.
6 Check for air or combustion gas in the cooling system.
7 Inspect the filler cap and check the surface which the filler cap seals against. This surface must be clean.
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