X10 ENGINE COOLANT LEAKS - Alfa - 166 - eLearn

3308746 - X10 ENGINE COOLANT LEAKS

A leak of engine coolant is seen with dripping and/or fouling of the engine

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily carry out a visual inspect to locate the component or area which is leaking. If the visual inspection is insufficient, wash the engine, dry it and start it slowly until it reaches operating temperature: to identify the leak, if necessary, carry out the system leakage test Op. 0510C30	No leak identified: Continue to Step 1	Leak identified	Move on directly to the step involved
1	PIPE CHECK	All OK	Problems met	Operation
	Check the condition and seal of the pipes. In particular: condition and correct fitting of the bands condition of hoses, connectors and plugs	Continue to Step 2	Tightenings not correct or components damaged	Restore the correct tightening or replace the components involved (see Assembly 1088D)
2	RADIATOR CHECK	All OK	Problems met	Operation
	Check the condition of the radiator	Continue to Step 4	Radiator damaged or distorted	Replace the radiator Op. 1088B24
3	EXPANSION TANK CHECK	All OK	Problems met	Operation
	Visually inspect: the condition of the expansion tank the seal of the plug Check the condition of the breather valve cap	Continue to Step 4	Tank damaged or distorted	Replace the tank or the cap Op. 1088B10
4	WATER PUMP CHECK	All OK	Problems met	Operation
	Visually inspect: the condition of the water pump the seal of the gaskets	Continue to Step 5	Water pump faulty	Replace the water pump or the gaskets Op. 1088C12
5	THERMOSTAT UNIT CHECK	All OK	Problems met	Operation
	Visually inspect: the condition of the thermostat group the seal of the gaskets	Continue to Step 6	Thermostat unit faulty	Replace the thermostat unit or the seals Op. 1088C42
6	CHECKING CYLINDER HEAD GASKET	All OK	Problems met	Operation
2.0 TS 2.4 JTD 10v	Verify: that the cylinder head tightening is correct the gasket seal	Continue to Step 6	Cylinder head tightening not correct	Restore correct tightening
2.0 TS 2.4 JTD 10v		Continue to Step 6	Gasket damaged	Replace the gasket Op. 1016C11
2.5 V6 3.0 V6 2.0 TB	Verify: that the cylinder head tightening is correct the gasket seal	Continue to Step 6	Cylinder head tightening not correct	Restore correct tightening
2.5 V6 3.0 V6 2.0 TB		Continue to Step 6	Gasket damaged	Replace the gasket Op. 1016D11
7	HECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'