3233023 - D35 LOW ENGINE OIL PRESSURE

The special warning light indicates a decrease in the engine oil pressure.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation

Preliminarily check:

  • the engine oil level
  • engine coolant level
Check that the type of oil is suitable for the engine in question		 Continue to Step 1 Engine oil level too low Top up the engine oil level Op.   1084A10 
Engine coolant level Top up the engine coolant level Op. 1088A10
Oil unsuitableTop up with correct type of oil
1ENGINE OIL TYPE AND FILTER CHECKAll OKProblems metOperation
Check that the engine oil is the recommended type in the correct quantityCheck that the oil filter is the recommended type and that it is correctly fitted Continue to Step 2 Engine oil unsuitableChange the engine oil
Oil filter unsuitable or incorrectly fitted Replace the engine oil filter Op.   1084B30 
2OIL PUMP CHECKAll OKProblems metOperation
Check the condition of the oil pump.

In particular, check:

  • condition and cleanliness of oil pressure relief valve
  • condition of spring
 Continue to Step 3 Oil pump damaged or distortedPressure relief valve damaged Replace the oil pump Op. 1084B10
3CHECK ON LUBRICATION SYSTEMAll OKProblems metOperation
Carry out a general check on the lubrication system Op.   0510C20  Continue to Step 4 Faults in the lubrication systemRestore the lubrication system
4MAIN/BIG END BEARINGS CHECKAll OKProblems metOperation
Overhaul the engine: in particular, check the condition of the crankshaft and big end bearings (see ENGINE OVERHAUL, Subassembly 1028) Continue to Step 5 Main and big end bearings faulty Replace main and big end bearings Op.   1024A10 
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'
The special warning light indicates a decrease in the engine oil pressure.
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation

Check:

  • that the engine oil level is correct
  • that there are no leaks from the lubrication circuit
 Continue to Step 1 Oil level lowRestore the correct level
Leaks detectedEliminate the leaks
1CHECK LUBRICATION SYSTEM PRESSUREAll OKProblems metOperation
Check that the lubrication system pressure is correct Op.   0510C20  Continue to Step 4 Low engine oil pressure Continue to Step 2
2CHECK ON LUBRICATION SYSTEMAll OKProblems metOperation
Check that the engine oil pump is working properly Op.   1084B18  Continue to Step 3 Oil pump faulty Replace the oil pump Op. 1084B10
3CHECK ON LUBRICATION SYSTEMAll OKProblems metOperation

Check:

  • crankshaft channel cap seals;
  • main bearing/connecting rod bearing clearance
 Continue to Step 4 Caps faulty Replace the plugs Op. 1024A20
Excessive clearanceRestore correct clearance
4CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault in the instrument panel