184000599 - X08 ENGINE COOLANT CONSUMPTION

The coolant consumption is high (it needs topping up frequently)
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
First visually inspect the cooling system to check that there are no coolant leaks.Continue to Step 1There are leaksCoolant leaks detectedSee table X10
1COOLING SYSTEM LEAKAGE CHECKAll OKProblems metOperation
Connect the test equipment replacing the expansion tank cap, pressurize the system to a value of slightly below 1.4 bar and check that the pressure remains at the recommended value for a few minutes and that there are no visible leaks.Continue to Step 3Fall in pressure detected with no visible leaksContinue to Step 2
Fall in pressure detected with visible leaksCoolant leaks detectedSee table X10
2CHECKING CYLINDER HEADAll OKProblems metOperation
Remove the head.

Check:

  • That the planarity of the cylinder head plane is correct
  • That the planarity of the cylinder head support surface on the cylinder block is correct;
Continue to Step 3Cylinder head plane defectiveRegrind the cylinder head plane
Cylinder block/crankcase plane defectiveRegrind the cylinder block/crankcase plane
Planes correct, head gasket faultyReplace the cylinder head gasket
3CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis