H01 Vehicle drifting
- Make
- Alfa Romeo
- Model
- 156 Factory Service Manual
- Year
- 1997–2002
- Section
- Steering – car handling › H01 Vehicle drifting
H01 Vehicle drifting
Whilst driving in a straight line, the vehicle tends to drift towards the right and/or the left.
If necessary, carry out a test on a straight, flat road with no cambers.
Check the effective deviation from the trajectory by, very carefully, loosening your grip on the steering wheel
| Step | Test procedure | Result | Action |
|---|---|---|---|
| 0 | PRELIMINARY CHECKS Preliminarily, check the type, condition and inflation pressure of the tyres Check that the tyres are correctly fitted and that the wheels are correctly fixed | OK | |
| Tyre inflation pressure not correct |
End of diagnosis | ||
| Tyres not suitable or worn |
End of diagnosis | ||
| Fitting tyres |
End of diagnosis | ||
| Wheel fixing not correct |
End of diagnosis | ||
| 1 | WHEEL CHECK Check:
| OK | |
| Wheels not balanced |
End of diagnosis | ||
| Incorrect fitting of front brake calipers |
End of diagnosis | ||
| Incorrect fitting of rear brake calipers |
End of diagnosis | ||
| 2 | FRONT WHEEL GEOMETRY CHECK Check the front wheel geometry and angles, Op. 4450A10 | OK | |
| Geometry not correct |
End of diagnosis | ||
| Angles not correct |
End of diagnosis | ||
| 3 | CHECK REAR WHEEL GEOMETRY Check the rear wheel geometry and angles Op. 4450A40 | OK | |
| Geometry not correct |
End of diagnosis | ||
| Angles not correct |
End of diagnosis | ||
| 4 | UNDERBODY CHECK Visually inspect the underbody Check that there are no accidental blows, dents or bent suspension arms | OK | |
| Damage, in particular to the front suspension |
End of diagnosis | ||
| 5 | WHEEL BEARINGS CHECK Check the condition and operation of the wheel hub bearings | OK | |
| Front wheel bearing worn or damaged |
End of diagnosis | ||
| Rear wheel bearing worn or damaged |
End of diagnosis | ||
| 6 | FLEXIBLE MOUNTINGS AND BUSHES, FRONT AREA, CHECK Check the condition of the bushes and mountings. In the order:
| OK | |
| Steering box rods worn or damaged |
End of diagnosis | ||
| Arm supports worn or damaged |
End of diagnosis | ||
| Selector fork supports worn or damaged |
End of diagnosis | ||
| Anti-roll bar mountings worn or damaged |
End of diagnosis | ||
| 7 | ENGINE SUPPORT CHECK Check the condition and the centering of the front crossmember and the engine supports and reaction rod | OK | |
| Engine supports faulty |
End of diagnosis | ||
| Reaction rod faulty |
End of diagnosis | ||
| Engine support crossmeber faulty |
End of diagnosis | ||
| 8 | DIFFERENTIAL CHECK Check the condition of the differential: in particular make sure that there are no clearances | OK | |
| Differential operation faulty |
End of diagnosis | ||
| 9 | CHECK 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
- TOOLTie rod end toolSearch: tie rod end puller
- TOOLBall joint separatorSearch: ball joint separator
- FLUIDPower steering fluidSearch: Alfa Romeo power steering fluid
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