This page is to indicate the torque values for different parts of the Fiat 500. All values are in Nm!
Motor #
| Cylinder head nut | 40 1) (click) |
| Main bearing front and rear | 30 |
| Drive rod bearing caps | 35 |
| Flywheel bolts | 35 |
| Camshaft gear bolts | 10 |
| Centrifugal oil filter | 8 |
| Hollow bolt pulley on crankshaft | 150 |
| Nuts rocker shaft | 25 |
| Nut fan on alternator | 35 |
| Nut pulley on alternator | 35 |
| Spark plugs | 30 |
| Bolt of rear engine mount (R/126) | 50 |
| Rear motor support to intermediate panel | 50 |
Gearbox and differential #
| Suspension rubber on gearbox | 15 |
| Gearbox support | 40 |
| Mounting suspension rubbers of gearbox | 15 |
| Mounting bolt of clutch fork | 25 |
| Nut of clutch cable bracket | 15 |
| Gearbox to engine (flywheel housing) | 25 |
| Flywheel housing to gearbox | 35 |
| Crown nut of pignon shaft | 50 2) (click) |
| Crown nut of tower gear shaft | 50 2) (click) |
| Locking bolt for shaft of reverse gear | 15 |
| Crown wheel bolts | 45 |
| Differential bearing holders | 15 |
Front wheel suspension #
| Self-locking nut of leaf spring to steering knuckles | 40 |
| Self-locking nuts of half arms on wheel hub shaft | 25 |
| Rubber bumpers on leaf spring | 15 |
| Leaf spring mounts to bodywork | 30 |
| Wheel hub shaft to bodywork | 30 |
| Wheel hub to steering knuckle | 60 |
| Lower and upper shock absorber mounting | 20 |
| Wheel bolts | 50 |
| Hub nuts | 3) (click) |
Steering #
| Steering wheel nut | 50 |
| Mounting bolt of universal joints on steering shaft | 25 |
| Mounting of steering box | 30 |
| Serrated nuts of attachment of steering shaft holder | 15 |
| Attaching the auxiliary steering box | 30 |
| Auxiliary steering box on shaft | 70 |
| Pitman arm on shaft | 10 |
| Tie rod steering ball joints | 35 |
| Rod end clamps | 15 |
Rear wheel suspension #
| Rubber bumpers on bodywork | 15 |
| Support of wishbone to bodywork | 50 |
| Silent-bloc bolts of wheel support arms | 80 |
| Lower and upper shock absorber mounting | 30 |
| Wheel hub and brake anchor plate at wheel wishbone | 55 |
| Drive shaft to flexible coupling | 28 |
| Central nut of flexible coupling | 4) (click) |
| Wheel bolts | 50 |
Brakes #
| Brake anchor plate to steering knuckle | 20 |
| Bolts for brake drum to hub | 85 |
| Wheel brake cylinder to brake anchor plate | 10 |
| Handremsteun aan carrosserie | 15 |
Electrical installation #
| Belt pulley of alternator | 20 |
| Nut of cooling air fan | 20 |
Notes #
1) #
First tighten to a value of 25 Nm. Then to a value of 40 Nm.
2) #
If at the prescribed tightening torque the holes in the nut and the shaft do not match, the nut must be tightened to a maximum of 60 Nm. Always secure this nut with a cotter pin!
3) #
Setting the bearing clearance on a hub nut requires accuracy. First, make sure the hub is mounted correctly and that all parts are clean. Always use new nuts for reliability and safety. Tighten the hub nut to a torque of 20 Nm. Then turn the hub around a few times to allow the bearings to set and loosen the nut. Then tighten the nut to a torque of 7 Nm. Mark a dash centered on one of the hexagonal faces of the nut as a reference point and continue turning the nut until the next vertex matches the mark. This amounts to a twist of about 30 degrees. Measure the axial bearing clearance with a clock micrometer, which should be between 0.025 and 0.10 mm. If necessary, adjust the nut to stay within these tolerances. Secure the hub nut by tapping some material into the groove of the shaft journal so that the nut will not come loose. Use an appropriate tool for a firm lock. Fill the hub cap with about 25 grams of grease for proper lubrication of the bearings and gently tap the hub cap back into place.
4) #
When installing new rear wheel bearings or a new flexible coupling, it is essential to use a new spacer bushing. The old spacer is deformed and therefore no longer usable. After the bearings are packed with wheel bearing grease and installed in the hub together with the axle journal, a new spacer, the retaining rings and the spacer, slide the flexible coupling onto the axle journal. Tighten the nut on the end of the axle journal until the bearings are under preload such that a torque of up to 0.5 Nm is required to twist the axle journal.
