3233209 - X05 EXCESSIVE OIL CONSUMPTION

The engine is running smoothly, but the oil consumption is higher than previously recorded during the life of the vehicle.
High consumption during the first few thousand kilometres is considered normal.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Visually check for any leaks which could have caused the high consumptionCheck that the type of oil is suitable for the engine in question Continue to Step 1 Obvious oil leaks See table   X12 
Oil unsuitableTop up with correct type of oil
1CYLINDER HEAD OIL PENETRATION CHECKAll OKProblems metOperation
1.6 TS 1.8 TS [d] 1.9 JTD 8v 2.4 JTD 10v

Remove the cylinder head and check:

  • that there is no oil in the combustion chambers and on the inlet valves
  • that the valve stems are not worn
Continue to Step 2 Excessive clearance between the head componentsHead components damaged or distorted Replace the components involved Op.   1016E10 
2.5 V6

Remove the cylinder head and check:

  • that there is no oil in the combustion chambers and on the inlet valves
  • that the valve stems are not worn
Continue to Step 2 Excessive clearance between the head componentsHead components damaged or distorted Replace the components involved Op.   1016E26 
2PISTON OIL PENETRATION CHECKAll OKProblems metOperation

Check the piston rings, 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 rings damaged or seizedRings incorrectly fitted Replace the piston rings Op. 1028H11
3CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'
The engine is running smoothly, but the oil consumption is higher than previously recorded during the life of the vehicle.
High consumption during the first few thousand kilometres is considered normal.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Visually check for any leaks which could have caused the high consumption Continue to Step 1 Obvious oil leaksLocate the leaks and eliminate them
1CYLINDER HEAD OIL PENETRATION CHECKAll OKProblems metOperation

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.   1016E26 
2ENGINE OIL PENETRATION CHECKAll OKProblems metOperation

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 seizedReplace liners or liner/piston assemblies
Piston seals not correctly fitted Fit the seals correctly
3CYLINDER LINER/BORE CHECKAll OKProblems metOperation

Verify:

  • 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-compliantReplace liners
Dimensions outside of the toleranceReplace liners
Fitting clearance incorrectReplace liners or liner/piston assembly
4CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis