X05 EXCESSIVE OIL CONSUMPTION - Alfa - 147 - eLearn

3022761 - X05 EXCESSIVE OIL CONSUMPTION

High consumption during the first few thousand kilometres is considered normal.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Visually check for any leaks which could have caused the high consumption	Continue to Step 1	Obvious oil leaks	Locate the leaks and eliminate them
1	CYLINDER HEAD OIL PENETRATION CHECK	All OK	Problems met	Operation
	Remove the cylinder head and check: That there are no carbon deposits in the combustion chambers and on the inlet valves That the valve stems are not worn	Continue to Step 2	Excessive clearance between the valve stem and valve guide and between the valve stem and oil seal	Replace the damaged/worn components Op. 1016E10
2	ENGINE OIL PENETRATION CHECK	All OK	Problems met	Operation
	Check the piston seals, in particular: that they are not broken or damaged that the actual rings are correctly fitted that there is no seizing or sticking in the grooves	Continue to Step 3	Piston seals damaged or seized	Replace pistons, pins and seals
		Continue to Step 3	Piston seals not correctly fitted	Fit the seals correctly
3	CYLINDER LINER/BORE CHECK	All OK	Problems met	Operation
	Check: The condition of the surfaces and dimensions (ovality/taper) of the cylinder liners/bores; Piston - liner/bore fitting clearance;	Continue to Step 4	Liner/bore surfaces non-compliant	Grind the cylinder liners/bores
			Dimensions outside of the tolerance	Grind the cylinder liners/bores
			Fitting clearance incorrect	Replace the pistons, pins and seals, following the fitting clearances
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis