23 · Diagnostics

Engine coolant leaks

Make: Alfa Romeo
Model: Brera and Spider Factory Service Manual
Year: 2005–2010
Section: Consumption /leaks/ wear › Engine coolant leaks

‹ Prev Engine coolant consumption Next › Engine oil leaks

Fault diagnosisEngine coolant leaks

ENGINE COOLANT LEAKS

2.2 JTS, 3.2 JTS

An engine coolant leak can be seen with consequent dripping and/or fouling of the engine.

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	- Carry out an initial visual inspection to locate the component that is leaking or the area of the leak. - Check that there is no engine oil in the coolant. - Check that there is no water or emulsion in the engine oil. - If the visual check is not sufficient, wash the engine, dry it and start slowly to bring it up to the correct temperature. Test the watertightness of the system to identify the leak Op. 0510C30 ENGINE COOLING SYSTEM - LEAKAGE TEST	Move on to Step 1	Leaks from pipes	Move on to Step 1
			Leak from the radiator	Move on to Step 2
			Leak from the expansion tank	Move on to Step 3
			Leak from the water pump	Move on to Step 4
			Leak from the thermostat unit	Move on to Step 5
			Leak from the cylinder head	Move on to Step 6
			Leak from the heater radiator	Move on to Step 7
			Oil or water leaking between the engine and the cooling circuit	Move on to Step 8
1	PIPE CHECK	All OK	Problems encountered	Operation
	Check the condition of the pipes and the seal. More specifically: - the condition of the bands making sure they are correctly fitted; - the condition of the hoses, connectors and plugs	Move on to Step 2	Tightening not correct or components damaged.	Restore the correct tightening or replace the components involved
2	RADIATOR CHECK	All OK	Problems encountered	Operation
	Check the condition of the radiator	Move on to Step 3	Radiator damaged or distorted.	Replace the radiator Op. 1088B20 ENGINE COOLING RADIATOR - R + R
3	EXPANSION TANK CHECK	All OK	Problems encountered	Operation
	Visually check: - the condition of the expansion tank; - the cap seal. Check the condition of the cap breather valve.	Move on to Step 4	Tank damaged or distorted.	Replace the tank or the cap
4	WATER PUMP CHECK	All OK	Problems encountered	Operation
	Visually check: - the condition of the water pump; - the seal of the gaskets.	Move on to Step 5	Water pump faulty.	Replace the water pump or the gaskets Op. 1088C10 WATER PUMP - R + R
5	CHECK THERMOSTAT UNIT	All OK	Problems encountered	Operation
	Visually check: - the condition of the thermostat unit; - the seal of the gaskets.	Move on to Step 6	Thermostat unit faulty.	Replace the thermostat unit or the gaskets Op. 1088C30 THERMOSTAT UNIT - R+R
6	CYLINDER HEAD GASKET CHECK	All OK	Problems encountered	Operation
	Check: - that the cylinder head is correctly tightened; - the seal of the gasket.	Move on to Step 7	Cylinder head tightening incorrect	Restore correct tightening.
		Move on to Step 7	Gasket damaged.	Replace the gasket.
7	HEATER RADIATOR CHECK	All OK	Problems encountered	Operation
	Check the condition of the heater radiator	Move on to Step 8	Heater radiator damaged or distorted.	Replace the heater radiator Op. 5040C50 AIR CONDITIONING HEATER RADIATOR - R.R.
8	CHECK ENGINE BLOCK SURFACE	All OK	Problems encountered	Operation
	Remove the head (only for 2.2 JTS version) Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET (only for 3.2 V6 version) Op. 1016D10 CYLINDER HEAD – R.R. AND REPLACE GASKETS Check that there are no leaks: - oil deposits on valves; - defects on engine block; - defects on cylinder head gasket.	Move on to Step 9	Oil deposits on the valves.	(only for 2.2 JTS version) Overhaul the head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL (only for 3.2 V6 version) Overhaul the head Op. 1016E20 CYLINDER HEAD (ONE), LEFT OR RIGHT, REMOVED - OVERHAUL
		Move on to Step 9	Cylinder block plane defective.	Level the engine block.
9	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists.	Contact Technical Service for further information on the problem.

‹ Prev Engine coolant consumption Next › Engine oil leaks

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