22 · Diagnostics

Engine coolant leaks

Make: Fiat
Model: Doblò Factory Service Manual
Year: 2000–2010
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
	Preliminarily carry out a visual inspect to locate the component or area which is leaking. 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 inspection is not sufficient, wash the engine, dry it, start it and run it slowly until it comes up to temperature; to identify the leak, carry out a leak test on the system Op. 0510C30	Continue to Step 1	Leak from the pipes	Continue to Step 1
			Leak from the pipes	Continue to Step 2
			Leak from the pipes	Continue to Step 3
			Leak from the pipes	Continue to Step 4
			Leak from the pipes	Continue to Step 5
			Leak from the pipes	Continue to Step 6
			Leak from the pipes	Continue to Step 7
			Leak from the pipes	Continue to Step 8
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	Tightening not correct or components damaged	Restore the correct tightening or replace the components involved
2	CHECKING RADIATOR	All OK	Problems met	Operation
1.2 8v	Check the condition of the radiator	Continue to Step 3	Radiator damaged or distorted	Op. 1088B20
1.9 DIESEL	Check the condition of the radiator	Continue to Step 3	Radiator damaged or distorted	Op. 1088B20
1.9 DIESEL	Check the condition of the radiator	Continue to Step 3	Radiator damaged or distorted	Op. 1088B24
3	CHECK EXPANSION TANK	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 in the cap	Continue to Step 4	Tank damaged or distorted	Replace the tank or the cap
4	WATER PUMP CHECK	All OK	Problems met	Operation
1.2 8v	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. 1088C10
1.9 DIESEL	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. 1088C10
1.2 8v Climatizzatore	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 unit; the seal of the gaskets	Continue to Step 6	Thermostat unit faulty	Replace the thermostat unit or the seals Op. 1088C30
6	CHECKING CYLINDER HEAD GASKET	All OK	Problems met	Operation
1.2 8v	Verify: that the cylinder head tightening is correct that the gasket is not leaking	Continue to Step 7	Cylinder head tightening not correct	Restore the correct tightening
1.2 8v		Continue to Step 7	Cylinder head tightening not correct	Replace the gasket Op. 1016C10
1.9 DIESEL	Verify: that the cylinder head tightening is correct that the gasket is not leaking	Continue to Step 7	Cylinder head tightening not correct	Restore the correct tightening
1.9 DIESEL		Continue to Step 7	Gasket damaged	Replace the gasket Op. 1016C10
1.2 8v Climatizzatore	Verify: that the cylinder head tightening is correct that the gasket is not leaking	Continue to Step 7	Cylinder head tightening not correct	Restore the correct tightening
1.2 8v Climatizzatore		Continue to Step 7	Gasket damaged	Replace the gasket Op. 1016C11
7	HEATER RADIATOR CHECK	All OK	Problems met	Operation
	Check the condition of the heater radiator	Continue to Step 8	Heater radiator damaged or distorted	Replace the radiator Op. 5020A50
8	CYLINDER BLOCK/CRANKASE SURFACE CHECK	All OK	Problems met	Operation
1.2 8v	Remove the cylinder head Op. 1016C10 Check that the following are absent: oily deposits on the valves; defects in the cylinder block/crankcase surface; defects in the cylinder head gasket;	Continue to Step 9	Cylinder block/crankcase surface defective	Reface the cylinder block/crankcase
1.2 8v		Continue to Step 9	Oily deposits on the valves	Overhaul the cylinder head Op. 1016E10
1.9 DIESEL	Remove the cylinder head Op. 1016C10 Check that the following are absent: oily deposits on the valves; defects in the cylinder block/crankcase surface; defects in the cylinder head gasket;	Continue to Step 9	Cylinder block/crankcase surface defective	Reface the cylinder block/crankcase
1.9 DIESEL		Continue to Step 9	Oily deposits on the valves	Overhaul the cylinder head Op. 1016E10
1.9 DIESEL	Remove the cylinder head Op. 1016C11 Check that the following are absent: oily deposits on the valves; defects in the cylinder block/crankcase surface; defects in the cylinder head gasket;	Continue to Step 9	Cylinder block/crankcase surface defective	Reface the cylinder block/crankcase
1.9 DIESEL		Continue to Step 9	Oily deposits on the valves	Overhaul the cylinder head Op. 1016E10
9	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'

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Parts & tools for this job Staging For 2000 Fiat Doblò

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