3233211 - X10 ENGINE COOLANT LEAKS

A leak of engine coolant is seen with 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 which is giving rise to the leak. If the visual inspection is insufficient, wash the engine, dry it and start it slowly until it reaches operating temperature: to identify the leak, if necessary, carry out the system leakage test Op.   0510C30  No leak located: Continue to Step 1 Leak locatedProceed directly with the step involved
1PIPE CHECKAll OKProblems metOperation

Check the condition and seal of the pipes. In particular:

  • condition and correct fitting of the bands
  • condition of hoses, connectors and plugs
 Continue to Step 2 Tightenings not correct or components damagedRestore the correct tightening or replace the components involved (see Assembly 1088D)
2RADIATOR CHECKAll OKProblems metOperation
Check the condition of the radiator Continue to Step 4 Radiator damaged or distorted Reaplce the radiator Op.   1088B24 
3EXPANSION TANK CHECKAll OKProblems metOperation

Visually inspect:

  • the condition of the expansion tank
  • the seal of the plug
  • Check the condition of the breather valve cap
 Continue to Step 5 Tank damaged or distorted Replace the tank or the cap Op.   1088B10 
4WATER PUMP CHECKAll OKProblems metOperation

Visually inspect:

  • the condition of the water pump
  • the seal of the gaskets
 Continue to Step 5 Water pump faulty Replace the water pump or the gaskets Op.   1088C12 
5THERMOSTAT GROUP CHECKAll OKProblems metOperation

Visually inspect:

  • the condition of the thermostat group
  • the seal of the gaskets
 Continue to Step 6 Thermostat group faulty Replace the thermostat unit or the seals Op.   1088C42 
6CYLINDER HEAD GASKET CHECKAll OKProblems metOperation
1.6 TS 1.8 TS [d] 1.9 JTD 8v 2.4 JTD 10v

Check:

  • that the cylinder head tightening is correct
  • the gasket seal
 Continue to Step 6 Cylinder head tightening not correctRestore correct tightening
Gasket damaged Replace the gasket Op. 1016C11
2.5 V6

Check:

  • that the cylinder head tightening is correct
  • the gasket seal
 Continue to Step 6 Cylinder head tightening not correctRestore correct tightening
Gasket damaged Replace the gasket Op. 1016C11
7CHECK CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'