Steering wheel oscillations / vibrations / whilst driving
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Steering – vehicle behaviour › Steering wheel oscillations / vibrations / whilst driving
STEERING WHEEL OSCILLATIONS / VIBRATIONS / WHILST DRIVING
There are rapid oscillations in the steering on a straight road at speed
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|---|---|---|---|
| First of all check the type, state and inflation pressure of the tyres. Check that the wheels are correctly fastened | Move on to Step 1 | 1. Tyre inflation pressure not correct 2. Tyres unsuitable or worn 3. Wheel not correctly fastened | 1. Restore the correct tyre inflation pressure 2. Replace the tyres 3. Tighten the wheels correctly | |
| 1 | WHEEL CHECK | All OK | Problems encountered | Operation |
Check: - That the wheels are correctly balanced; - The condition of the wheel rims (they should not show signs of dents or distortions) | Move on to Step 2 | 1. Wheels not balanced 2. Rims dented or distorted | 1. Balance the wheels 2. Replace the rims | |
| 2 | WHEEL ALIGNMENT CHECK | All OK | Problems encountered | Operation |
| Check the wheel alignment | Move on to Step 3 | Alignment not correct | Restore the correct vehicle alignment | |
| 3 | ENGINE FLEXIBLE MOUNTINGS CHECK | All OK | Problems encountered | Operation |
| Check the condition of the engine frame, supports and connecting rod connecting the engine to the mechanical crossmember | Move on to Step 4 | 1. Engine flexible mountings faulty 2. Reaction connecting rod faulty 3. Mechanical crossmember faulty | 1. Adjust the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque. Op. 1008A POWER UNIT FASTENINGS 2. Adjust the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque. Op. 1008C POWER UNIT REACTION ELEMENTS 3. Adjust the fastenings: loosen the bolts, centre them in their housings and tighten them to the recommended torque. | |
| 4 | BUSHES AND FLEXIBLE MOUNTINGS CHECK | All OK | Problems encountered | Operation |
Check the condition of the bushes and mountings. In order: - steering box rod pin with joint; - lower track control arm bushes; - anti-roll bar flexible mountings | Move on to Step 5 | 1. Steering box rod pin with joint worn or damaged 2. Bushes for arms worn or damaged 3. Anti-roll bar flexible mountings worn or damaged | 1. Replace the rods Op. 4110B10 STEERING LINKS - R+R ON VEHICLE - CHECK TOE-IN/TOE-OUT SEPARATELY 2. Replace the lower track control arms 3. Replace the flexible mountings | |
| 5 | SPRING SHOCK ABSORBER ASSEMBLY CHECK | All OK | Problems encountered | Operation |
Check: - The condition of the shock absorbers and springs and that they are working properly; - The fastenings for the spring/shock absorber assembly. | Move on to Step 6 | 1. Tightening not correct 2. Shock abosrbers not working properly 3. Springs not working properly. | 1. Renew the correct fastening 2. Replace the shock absorber involved 3. Replace the spring involved | |
| 6 | STEERING RODS AND ARMS CHECK | All OK | Problems encountered | Operation |
| Check the condition of the steering rods and arms | Move on to Step 7 | 1. Rods damaged or worn 2. Arms damaged or worn | 1. Replace the rods or joints Op. 4110B10 STEERING LINKS - R+R ON VEHICLE - CHECK TOE-IN/TOE-OUT SEPARATELY 2. Replace the steering box | |
| 7 | CHECK STEERING COLUMN BEARINGS | All OK | Problems encountered | Operation |
| Check the condition of the steering column support bearings and that they are working properly | End of diagnosis | Bearings worn or damaged | Restore the efficiency of the steering column. If necessary, replace the bearings involved | |
Parts & tools for this job For 2005 Fiat Grande Punto
- TOOLTie rod end toolSearch: tie rod end puller
- TOOLBall joint separatorSearch: ball joint separator
- FLUIDPower steering fluidSearch: Fiat power steering fluid
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