3022758 - W11 EXCESSIVE EXHAUST FUMES'
-| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
Preliminarily check:
| Continue to Step 1 | Oil level too high | Top up the engine oil level | |
| Filter element dirty or damaged | Replace the filter element Op. 1048A14 | |||
| 1 | CHECKING WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Connect
the diagnostic equipment (Examiner or other instruments) to the
diagnostic socket Check:
| Continue to Step 2 | An error is detected in the control unit | Continue following the instructions for the diagnostic equipment | |
| Lack of dialogue with the control unit | Restore the connection between engine management control unit and diagnostic connector See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | |||
| 2 | CHECKING BLOW-BY CIRCUIT | All OK | Problems met | Operation |
| Check the condition of the blow-by gases intake circuit. In particular, check that there are no obstructions in the separator or in the pipes | Continue to Step 3 | Fault in the pipe from separator to intake | Restore the correct operation of the circuit: if necessary, replace the pipes | |
| Fault in separator (rocker cover) | Restore the correct operation of the circuit; if necessary replace the rocker cover | |||
| 3 | CHECKING AIR CIRCUIT | All OK | Problems met | Operation |
| Check the condition and the seal of the air supply circuit: in particular, make sure that there is no oil in the pipes | Continue to Step 4 | Circuit component damaged | Replace the damaged component | |
| Oil in air intake pipes | Clean the pipes (check where the oil is coming from) | |||
| 4 | CHECK E.G.R. OPERATION | All OK | Problems met | Operation |
| Carry out active diagnosis of the drive solenoid and dismantle the valve assembly to check correct operation | Continue to Step 5 | Solenoid valve faulty | Check wiring continuity See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT | |
| Solenoid valve faulty | Replace the solenoid valve Op. 1080C74 | |||
| Fault in valve assembly | Replace the valve assembly Op. 1080C74 | |||
| 5 | CHECK ON CYLINDER COMPRESSION | All OK | Problems met | Operation |
| Carry out the cylinder compression test | Continue to Step 7 | Cylinder compression insufficient | Continue to Step 6 | |
| 6 | CHECK ON CAUSE OF INSUFFICIENT COMPRESSION | All OK | Problems met | Operation |
| Carry out R.R. on head to check the valve sealCheck the condition of the cylinders/piston rings | Continue to Step 7 | Insufficient valve seal | Overhaul the cylinder head Op. 1016E10 | |
| Wear on cylinders/piston rings outside tolerance | Restore the correct clearances | |||
| 7 | CORRECT OPERATION CHECK | All OK | Problems met | Operation |
| Check that the fault is no longer present | Fault persists | Search for the fault starting from another symptom' | ||