125000721 - X05 EXCESSIVE OIL CONSUMPTION

High consumption during the first few thousand kilometres is considered normal.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Check that the level of the engine oil is not high Op.    Op. 1048A10 AIR CLEANER FILTERING ELEMENT - REPLACECheck that there is no engine oil in the coolantCheck that the end of the exhaust pipe is not dirty with oilCheck whether there is blueish smoke in the exhaustCarry out a consumption testContinue to Step 1Engine oil leaksSee table    See table X12 ENGINE OIL LEAKS
Oil level outside the limitsRestore the correct level Op.    Op. 1084A10 PIPE FROM SENDER UNIT TO ENGINE OIL PRESSURE W/L - REPLACE
Oil in the cooling circuitContinue to Step 2
Exhaust tail pipe dirty with oilContinue to Step 2
Exhaust fumesContinue to Step 2
Excessive consumptionContinue to Step 2
1SPARK PLUG CHECKAll OKProblems metOperation
Check that there is no oil fouling the spark plugsContinue to Step 2Spark plugs fouled by oilContinue to Step 2
2CYLINDER BLOCK/CRANKCASE PLANE CHECKAll OKProblems metOperation
Remove the cylinder head Op.    Op. 1016C10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL

That that the following are absent:

  • oily dross on the valves;
  • defects in the cylinder block/crankcase plane;
  • defects in the cylinder head gasket;
Continue to Step 3Cylinder block/crankcase plane defectiveReface the cylinder block/crankcase
Presence of oily dross on the valvesOverhaul the cylinder head Op.    Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
3CYLINDER LINER/BORE CHECKAll OKProblems metOperation

Check the cylinder liners/bores. In particular:

  • no deep machining scoring;
  • no vitrification of the liners/bores;
  • make sure that there is no ovality or wear
Continue to Step 4Deep scoring or excessive ovalityReplace the engine Op.    Op. 1004B10 POWER UNIT WITH MANUAL GEARBOX - R + R
Cylinder liners/bore vitrifiedRegrind the cylinder
Machining groovesRegrind the cylinder
Seals faultyReplace the circlips Op.    Op. 1028H60 PISTON, PIN SET - REPLACE
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom''