23 · Diagnostics

White exhaust fumes

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Emissions › White exhaust fumes

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Fault diagnosisWhite exhaust fumes

WHITE EXHAUST FUMES

1.9 JTD 8V, 1.9 JTD 16V, 2.4 JTD 20V

There is a large amount of exhaust fumes, with light coloured smoke

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check: no water or other fluids in the fuel tank engine oil level	Continue to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank
		Continue to Step 1	Level too high	Top up the engine oil level
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the engine management control unit: in error mode that there are no faults	Continue to Step 2	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
2	CHECKING BLOW-BY CIRCUIT	All OK	Problems met	Operation
	Check the condition of the blow-by gases intake circuit. In particular, check that there are no obstructions in the separator or in the pipes	Continue to Step 3	Fault in the pipe from the intake to the separator	Restore the correct operation of the circuit: if necessary, replace the pipes
		Continue to Step 3	Fault in the separator	Restore the correct operation of the circuit: if necessary, replace the separator
3	CHECK ON CYLINDER COMPRESSION	All OK	Problems met	Operation
	Carry out the cylinder compression test	Continue to Step 5	Cylinder head tightening not correct	Continue to Step 4
4	CHECKING CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems met	Operation
	Remove-refit the cylinder head: Check the condition of the cylinders/piston rings the seal of the valve oil seals	Continue to Step 5	Wear on cylinders/piston rings outside tolerance	Restore the correct clearances
		Continue to Step 5	Insufficient valve oil seal	Replace the oil seals, if necessary, overhaul the head
0	PRELIMINARY CHECKS	All OK	Problems met	Operation
	Preliminarily check: if there is service information on the subject no water or other fluids in the fuel tank	Continue to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank
1	ROAD TEST THE VEHICLE	All OK	Problems met	Operation
	With the engine at operating temperature and after a long period of deceleration, check when then accelerating whether the problem is considerably worse	Continue to Step 2	Increase in acceleration fumes (after deceleration) caused by oil from the piston rings or valve guides	Continue to Step 3
2	CHECKING BLOW-BY CIRCUIT	All OK	Problems met	Operation
	Check the condition of the blow-by gases intake circuit. In particular, check that there are no obstructions in the separator or in the pipes	Continue to Step 3	Fault in the pipe from the intake to the separator	Restore the correct operation of the circuit: if necessary, replace the pipes
		Continue to Step 3	Fault in the separator	Restore the correct operation of the circuit: if necessary, replace the separator
3	CHECKING CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems met	Operation
	Remove-refit the cylinder head: Check the condition of the cylinders/piston rings the seal of the valve oil seals	Continue to Step 4	Wear on cylinders/piston rings outside tolerance	Restore the correct clearances
		Continue to Step 4	Valve oil seals leaking	Replace the oil seals, if necessary, overhaul the head
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

1.8, 1.9 JTS, 2.2 JTS, 3.2 JTS

A high level of pale-coloured exhaust fumes is noted

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	First of all, check for water or other fluids in the fuel tank.	Move on to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check that there are no faults in the engine management control unit.	Move on to Step 2	Error detected in the control unit	Continue following the instructions for the diagnostic equipment.
		Move on to Step 2	No communication with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Keeping the diagnostic equipment connected, carry out the active diagnosis at the injectors	Move on to Step 3	Injector connection faulty	Restore the connection between the injectors and the control unit See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
		Move on to Step 3	Injector fault	Replace the injector Op. 1056F70 INJECTOR ONE R R WITH FUEL MANIFOLD PIPE REMOVED INCLUDES GASKET REPLACEMENT
3	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 4	Cylinder head tightening incorrect	Restore correct tightening
		Move on to Step 4	Gasket damaged	Replace the damaged gasket.
4	BLOW-BY CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the condition of the blow-by gas intake circuit. In particular, check for obstructions in the separator or pipes	End of diagnosis	Fault in the blow-by circuit	Restore circuit to working order: replace the pipes if necessary

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Parts & tools for this job Staging For 2005 Alfa Romeo 159

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