184000601 - X12 ENGINE OIL LEAKS

A leak of engine oil can be seen with dripping and/or fouling of the engine
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Preliminarily carry out a visual inspect to locate the component or area which is leaking.Check the engine oil pressureNo leak locatedContinue to Step 1Leak located in the upper part of the enigneContinue to Step 3
Leak located in the lower part of the enigneContinue to Step 8
1LEAK ORIGIN CHECKSAll OKProblems metOperation
Wash the engine, dry it and apply talc to the parts concerned;road test the vehicle to check that there are no leaks.Continue to Step 9Leaks locatedContinue to Step 0
2CHECK FOR LEAKS IN UPPER PART OF THE ENGINEAll OKProblems metOperation

Check that there are no leaks:

  • camshaft housing gasket;
  • camshaft side seals;
  • cylinder head gasket
Continue to Step 9Leaks from the camshaft housingReplace the gaskets and seals involved
Leaks from the camshaftsReplace the gaskets and seals involved
Leaks from the cylinder head gasketReplace the gaskets and seals involved
3CHECK FOR LEAKS IN LOWER PART OF THE ENGINEAll OKProblems metOperation

Check that there are no leaks:

  • Oil drain plug;
  • Oil sump;
  • Oil filter
  • Crankshaft side gaskets
Continue to Step 9Leaks from the oil drain plugContinue to Step 4
Leaks from the oil sumpContinue to Step 5
Leaks from the oil filterContinue to Step 6
Leaks from the crankshaft gasketsContinue to Step 7
4DRAIN PLUG CHECKAll OKProblems metOperation
Check the condition and the seal of the oil drain plugContinue to Step 5Tightening of drain plug not correctTightening of drain plug not correct
5OIL SUMP CHECKAll OKProblems metOperation

Check:

  • The condition of the oil sump;
  • The seal of the sealant between the sump and the crankcase;
  • That the bolts fixing the sump are correctly tightened
Continue to Step 6Oil sump damaged or distortedReplace the oil sump Op. 1020A20
Lack of sealant or tightening not correctRestore the correct tightening
6OIL FILTER CHECKAll OKProblems metOperation

Check:

  • The condition of the oil filter;
  • The seal and condition of the gasket
Continue to Step 7Oil filter damaged or distortedReplace the oil filter and gasket Op. 1084B30
7ENGINE GASKETS CHECKAll OKProblems metOperation
Gain access to the crankshaft gaskets and check their sealContinue to Step 8Crankshaft gaskets damagedReplace the gaskets involved
Camshaft gaskets damagedReplace the gaskets involved
8OIL PRESSURE RELIEF VALVE CHECKAll OKProblems metOperation
Check the condition of the oil pump pressure relief valveContinue to Step 9Valve stuck in closed positionReplace the oil pump Op. 1084B16
9CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis