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Alfa Romeo 156 Factory Service Manual (1997-2002)16 · Fault diagnosis
16 · Diagnostics

X15 Gearbox differential leaks

Make
Alfa Romeo
Model
156 Factory Service Manual
Year
1997–2002
Section
Consumption / leaks / wear › X15 Gearbox differential leaks
Fault diagnosisX15 Gearbox differential leaks

X15 Gearbox differential leaks

An oil leak is seen from the gearbox/differential

StepTest procedureResultAction
0PRELIMINARY CHECKS

Check whether the fault is accompanied by a noise from the gearbox with the vehicle stationary and in neutral

Check the gearbox / differential oil level Op. 2110A04

OK

Move onto step 1

Noise detected from the gearbox

Move onto step (see S22)

Restore the correct level and carry out a road test.
  • If the defect persists,

Move onto step 1

1LEAKS CHECK

Thoroughly wash the gearbox, cover it with talc and road test the vehicle.

Visually check that there are no leaks

In particular, check the condition of the gaskets:

  • gearbox input shaft gasket
  • rear cover gasket
  • differential oil seal
OK

Move onto step 2

Leaks from the seals
  • Replace the seals (see OVERHAULING GEARBOXES Assembly 2110C)

End of diagnosis

Left differential oil seal leaks

End of diagnosis

Right differential oil seal leaks

End of diagnosis

2GEARBOX CASING CHECK

Visually check the condition of the gearbox casing, using talc

OK

Move onto step 3

Casing damaged, cracked or distorted
  • Replace the gearbox components, the rear cover, or the entire gearbox (see OVERHAULING GEARBOXES Assembly 2110B)

End of diagnosis

3CHECK CORRECT OPERATION

Check that the fault is no longer present

OK

End of diagnosis

Fault persists

Incorrect selection of diagnostic procedure

Parts & tools for this job For 1997 Alfa Romeo 156

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