Length of front and rear driveshafts prior to MY 1977
* Lengths «A» And «b» shown in the figure.
Lateral clearance between the splines of the front cardan shaft and the sliding sleeve when measured at a radius of 30 mm, mm: 0 + 0.03.
Axial free play of universal joint crosses, no more than, mm: 0.03.
The largest allowable dynamic unbalance when measured at the ends of the shaft pipe at a speed of 3000 rpm, gf cm: 15.
The largest allowable dynamic imbalance when measured in the center of the shaft pipe at a speed of 3000 rpm, gf cm: 20.
The highest permissible shaft rotation speed, rpm: 6500.
Intermediate bearing preload (in the direction of the front of the car, mm: 2.
Intermediate bearing brand: 6006 2 RS.
From model year 1977 on BMW «525», «528» And «528i» a cardan gear was installed with an annular elastic coupling on vehicles with a manual gearbox and with a segmental elastic coupling on vehicles with an automatic gearbox.
Features of the characteristics of cardan shafts
Tightening torques of the main threaded connections, kgf·m
- Nut of bolts of fastening of an annular elastic coupling: «518», «520», «520i»: 6,8-7,5; «525», «528»: 10,5-11,8.
- Nut of a bolt of fastening of a disk of the hinge: 10,5-11,8.
- Clamping sleeve: 4.0.
- Nuts of bolts for fastening the cross member of the intermediate support to the bottom of the body: 2.2-2.4.
- Nuts of bolts for fastening the propeller shaft flange to the rear axle gearbox flange: 6.8-7.5.
From model year 1977
- Nut of bolts of fastening of an elastic coupling:
- on vehicles with manual gearbox (M12x1.5): 11,4-12,7;
- on cars with automatic gearbox: 11.4-12.7.
- Nut of bolts of fastening of a flange of a cardan shaft to a reducer flange (M10): 6,8-7,6.
- Nuts of bolts of fastening of a cross-piece of an intermediate support to a body floor (M8): 2,2-2,4.
- Nuts of bolts for fastening the heat shield of the intermediate support: 1.2-1.4.
From model year 1980
- Nuts of fastening bolts of the segmental elastic coupling: M10: 6.8-7.6; M12 11.5-13.0.
- Clamping sleeve: 4.0-4.5.
- Nut of fastening of a plug of a forward cardan shaft (M12): 9,5-10,5 (preliminarily apply a special adhesive such as Loctite to the threaded end of the shaft).