3233212 - X12 ENGINE OIL LEAKS

An engine oil leak is seen with consequent dripping and/or fouling of the engine
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Carry out a preliminary visual inspection to locate the component or the area giving rise to the leak.If the visual inspection is not sufficient, wash the engine, dry it and sprinkle talc over the parts concerned: carry out a road test to identify the leakNo leak located: Continue to Step 1 Leak locatedMove directly onto the step concerned
1DRAIN PLUG CHECKAll OKProblems metOperation
Check the condition and the seal of the oil drain plug Continue to Step 2 Drain plug tightening not correct Restore the correct tightening Op.   1020A30 
2OIL SUMP CHECKAll OKProblems metOperation

Check:

  • the condition of the oil sump
  • the seal of the sealant between the sump and crankcase
  • that the bolts fixing the sump are correctly tightened
 Continue to Step 3 Oil sump damaged or distorted Replace the oil sump Op.   1020A20 
No sealant or tightening incorrect Restore the correct tightening Op.   1020A20 
3OIL FILTER CHECKAll OKProblems metOperation

Check:

  • the condition of the oil filter
  • the seal and condition of the seal
 Continue to Step 4 Oil filter damaged or distorted Replace the oil filter and the seal Op.   1084B30 
4OIL PRESSURE RELIEF VALVE CHECKAll OKProblems metOperation
Check the condition of the oil pump pressure relief valve Continue to Step 5 Valve stuck in closed position Replace the oil pump Op.   1084B16 
5ENGINE GASKET CHECKAll OKProblems metOperation
Gain access to the crankshaft and camshaft oil sealsCheck their seal Continue to Step 6 Crankshaft seals damagedReplace the seals concerned (see ENGINE OVERHAUL, Subassembly 1024)
Camshaft seals damagedReplace the seals concerned (see ENGINE OVERHAUL Subassembly 1036)
6CORRECT OPERATION CHECKAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'