3360212 - D36 ENGINE COOLANT OVERHEATING SIGNALLED BY THE INSTRUMENT / WITH VISIBLE VAPOUR VENTING

Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation

First check:

  • the coolant level
  • that there are no leaks
  • that there is no engine oil in the expansion tank
  • that the cooling radiator is not distorted or faulty
  • that the radiator is not dirty / blocked
Continue to Step 1 Level not correctTop up level
Leaks detectedMove on to the step concerned
Level not correctTop up level
Leaks detectedReplace the radiator
Leaks detectedClean/wash the radiator Op. 1088A20
1CHECK ON CAP SEALAll OKProblems metOperation
Check the seal of the expansion tank capContinue to Step 2Cap faultyReplace the cap
2CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check that there are no errors memorizedCarry out active diagnosis of fanCheck the fan operating cycleContinue to Step 5There are errors in the control unitContinue according to the instructions for the diagnostic equipment
There are errors in the control unitContinue to Step 3
3CHECK ON ENGINE COOLING ELECTRICAL CIRCUITAll OKProblems metOperation
Check that the fan control/power line is working properly See   E5020  ENGINE COOLING Continue to Step 4Connections not correctRestore connections See   E5020  ENGINE COOLING
4FAN OPERATION CHECKAll OKProblems metOperation
Supply the fan directly and check its operation See   E5020  ENGINE COOLING Continue to Step 5Fan not workingReplace fan Op.   1088E10 
5CHECKING THERMOSTAT OPERATIONAll OKProblems metOperation
Bleed the cooling system.Check that the thermostat is working properlyContinue to Step 6Thermostat not workingReplace the thermostat Op.   1088C30 
6WATER PUMP CHECKAll OKProblems metOperation
Check that the thermostat is working properlyContinue to Step 7Pump faultyReplace the pump Op.   1088C10 
7COOLING SYSTEM LEAKAGE TESTAll OKProblems metOperation
Carry out the cooling system leak test Op. 0510C30Continue to Step 10No seal with visible leaksEliminate the leaks
No seal without visible leaksContinue to Step 8
8CYLINDER HEAD HYDRAULIC SEAL CHECKAll OKProblems metOperation
Check the hydraulic seal of the cylinder head Op. 1016E04Continue to Step 9Seal insufficientRenew the seal, if necessary replace the head
9MONOBLOC HYDRAULIC SEAL CHECKAll OKProblems metOperation
Check the hydraulic seal of the blockContinue to Step 10Seal insufficientRenew the seal, if necessary replace the engine block
10CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentFault persistsSearch for the fault starting from another symptom'