22 · Diagnostics

Engine coolant leaks

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: Consumption /leaks/ wear › Engine coolant leaks

‹ Prev Engine coolant consumption Next › Engine oil leaks

Fault diagnosisEngine coolant leaks

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
	Carry out a preliminary visual inspection to locate the component or the area which is giving rise to the leak. 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 located: Continue to Step 1	Leak located	Proceed directly with the step involved
1	VISUAL INSPECTION OF CCOLANT EXPANSION TANK	All OK	Problems met	Operation
	Start up the engine and visually check that there are no air bubbles in the expansion tank	Continue to Step 2	Air in the cooling circuit	Eliminate the air from the cooling circuit
2	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 3	Tightenings not correct or components damaged	Restore the correct tightening or replace the components involved (see Assembly 1088D)
3	CYLINDER HEAD CHECK	All OK	Problems met	Operation
	Check: that the cylinder head tightening is correct the gasket seal	Continue to Step 4	Cylinder head tightening not correct	Restore correct tightening
			Gasket damaged	Replace the gasket Op. 1016C10
			Cylinder head damaged	Replace the cylinder head Op. 1016C20
4	RADIATOR CHECK	All OK	Problems met	Operation
	Check the condition of the radiator	Continue to Step 5	Radiator damaged or distorted	Reaplce the radiator Op. 1088B24
5	EXPANSION TANK CHECK	All OK	Problems met	Operation
	Visually inspect: the condition of the expansion tank the seal of the plug	Continue to Step 6	Tank damaged or distorted	Replace the tank or the cap Op. 1088B10
6	THERMOSTAT GROUP CHECK	All OK	Problems met	Operation
	Visually inspect: the condition of the thermostat group the seal of the gaskets	Continue to Step 7	Thermostat group faulty	Replace the thermostat unit or the seals Op. 1088C40
7	WATER PUMP CHECK	All OK	Problems met	Operation
	Visually inspect: the condition of the water pump the seal of the gaskets	Continue to Step 8	Water pump faulty	Replace the water pump or the gaskets Op. 1088C12
8	CHECKING 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'

‹ Prev Engine coolant consumption Next › Engine oil leaks

Parts & tools for this job For 1998 Fiat Multipla

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