NC SW6 Maintenance Instructions Manual page 73

CHART D1—Coolant loss
Cause
Incorrect coolant level.
Coolant leaking from engine radiator.
External engine coolant leak.
Overheating or compression gasses leaking,
resulting in loss through the radiator
overflow.
Lubricating oil cooler leak.
Cylinder head gasket leak.
Cylinder head cracked or porous.
Cylinder block coolant passages leaking.
Fault Finding
Check the level.
Visually inspect the radiator hoses and connections to locate the
leak.
If oil is present in the coolant, check for an engine oil cooler leak.
Visually inspect the engine and components for seal, gasket or
hose connection leaks. Make sure all hose clips are in good
condition and torqued to the recommended figure.
Refer to Chart D2.
Check/replace the oil cooler. Look for coolant in the oil.
Check/replace the head gasket.
Check/replace the head.
Check/replace the cylinder block.
Remedy
73