Engine coolant overheating signalled by gauge with vapours visible

Make: Lancia
Model: Thesis Factory Service Manual
Year: 2002–2009
Section: Engine › Engine coolant overheating signalled by gauge with vapours visible

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Fault diagnosisEngine coolant overheating signalled by gauge with vapours visible

ENGINE COOLANT OVERHEATING SIGNALLED BY GAUGE WITH VAPOURS VISIBLE

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	First, check: the level of the coolant fluid that there are no localized leaks that there is no engine oil in the expansion tank that the cooling radiator is not distorted or faulty that the radiator is not dirty/blocked	Move on to Step	1. Level not correct	1. Top up level
			2. Leaks detected	2. Move on to the step involved
			3. Presence of engine oil	3. Change the head gasket
			4. Radiator distorted	4. Replace the radiator
			5. Radiator dirty/blocked	5. Clean/wash the radiator See in Op. 1088A20 Engine cooling SYSTEM - Wash interior
1	PLUG SEAL CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the seal of the expansion tank cap	Move on to Step	Cap defective	Replace the cap
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic test equipment (Examiner or other instruments) to the diagnostic socket: Detect that there are no errors memorized Carry out the active diagnosis of the fan Check the fan operating cycle	Move on to Step	1. Presence of errors in the control unit	1. Proceed as instructed by the diagnostic tester
		Move on to Step	2. Operation does not conform	Move on to Step
3	ENGINE COOLING ELECTRIC CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check tha the fan power/control line is working properly (Wiring Diagram ) E5020 ENGINE COOLING	Move on to Step	Connections not correct	Move on to Step
4	FAN OPERATION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Supply the fan directly and check its operation (Wiring Diagram ) E5020 ENGINE COOLING	Move on to Step	Fan not working	Replace the fan See in Op. 1088E10 Radiator cooling FAN - R.R.
5	THERMOSTAT OPERATION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Bleed the cooling system Check that the thermostat is working properly	Move on to Step	Thermostat not working	Replace the thermostat See in Op. 1088C30 THERMOSTAT UNIT - R.R.
6	WATER PUMP CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the water pump is working properly	Move on to Step	Pump faulty	Change pump See in Op. 1088C10 WATER PUMP - R.R.
7	COOLING SYSTEM LEAKAGE TEST	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the seal of the cooling system See in Op. 0510C30 ENGINE COOLING SYSTEM - Leakage test	Move on to Step	1. Faulty seal with visible leaks	1. Eliminate leaks
		Move on to Step	2. Faulty seal without visible leaks	Move on to Step
8	HEAD HYDRAULIC SEAL CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the hydraulic seal of the cylinder head See in Op. 1016E04 SINGLE CYLINDER HEAD or (one) left or right, removed - Hydraulic test	Move on to Step	Seal not efficient	Restore the seal, replace the head if necessary
9	MONOBLOC HYDRAULIC SEAL CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the hydraulic seal of the monobloc	Move on to Step	Seal not efficient	Restore the seal, replace the monobloc if necessary
10	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present

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Parts & tools for this job For 2002 Lancia Thesis

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