Attention! After completing the work carried out on the front suspension beam, check the alignment of the front wheels.
Movement without a stiffening plate is prohibited.
Check the distance between the front side member and the dual cardan shaft.
Bleed the power steering.
Install plugs in places where pipelines are disconnected.
Removing the front axle beam must be carried out in the following order.
Prepare fixture «32.3.090» and pump out the fluid from the power steering reservoir, dispose of the fluid.
Mark the mutual position of the wheels on the hub and loosen the wheel bolts. Raise the vehicle on a lift and remove the front wheels. Remove the stiffening plate and the protective casing of the engine tray.
Open the hood of the engine compartment and install lifting device slings on the engine. Hang the engine with the tool «00.0.200» (see section «Replacing the front axle gearbox»).
Set the steering gear to the middle position, while the markings (see fig. 12.8) on the steering shaft and steering gear must match. Remove the key from the ignition switch.
Loosen the lower steering shaft clamp screw and disconnect the lower section of the steering shaft from the steering gear.
Loosen the nut using a puller «32.3.090», disconnect the tie rod on the left and right of the steering knuckle (arrow, fig. 13.11).
Loosen the nut (1) and remove the bolt (forward) figure 13.12 and disconnect the transverse suspension arm from the front axle beam on the left and right.
Loosen the nut (arrow, fig. 13.13), remove the bolt (forward) and disconnect the link from the front axle beam on the left and right.
Detach the right and left engine mounts from the front axle beam. For car with engine «M57», additionally unscrew the top nut of the engine mount/engine mount bracket. Install a set of fixtures in the beam nests. Remove bolts (arrows, fig. 13.14).
Install a garage jack under the front suspension beam and unscrew three bolts (arrows, fig. 13.15) fastenings on the left and right of the beam and release it down.
Slowly lower the beam until you have access to the hollow bolts of the steering mechanism (arrows, fig. 13.16). Unscrew the hollow bolts and remove the front axle beam together with the steering gear.
The installation of the front axle beam should be carried out in the reverse order, if necessary.
In case of damage to the threads in the front side member, repair using spiral inserts. Replace O-rings (D, see fig. 13.16).
Install the front suspension beam and tighten the new self-locking bolt nuts finger-tight.
Install the transverse arms and rods on the front suspension beam and pre-secure with new self-locking nuts, do not completely tighten the nuts.
Install the engine and remove the support from under it.
Hollow bolts M14 of the hydraulic power steering booster tighten to a torque of 33 Nm (3.3 kgf·m).
Install the front wheels according to the previously marked markings, on dry, clean bolts, pre-tightening them by hand. Put the car on wheels «squander» it and tighten the wheel bolts crosswise to 140 Nm (14.0 kgf·m).
Tighten the new self-locking nuts of the front suspension beam to the side member to a torque of 100.0 Nm (10.0 kgf·m).
Finally fix the longitudinal link to the front axle beam with a new self-locking nut, tightening it to a torque of 165 Nm (16.5 kgf·m);
Tighten the longitudinal transverse link to the front axle beam with a new self-locking nut in two stages:
- the first reception - a moment of 100 Nm (10.0 kgf·m);
- second step - tighten by 90° (+15°).
When installing the tie rod, there must be no traces of grease on the landing cone and in the hole.
Install the tie rods and finally tighten the new nuts to 80 Nm (8.0 kgf·m). If necessary, hold the assembly from turning by the internal hexagon.
New M8 nut (10.9) tighten the steel clamp of the steering mechanism with a torque of 24 Nm (2.4 kgf·m), aluminum clamp - 28 Nm (2.8 kgf·m).
Adjust the angles of the front wheels.
When installing the stiffening plate, strictly observe the process of its fastening - tighten the new bolts in two steps:
- 1st reception, torque 56 Nm (5.6 kgf·m);
- 2nd pass, turn 90°.
Bleed the power steering.
Check the distance between the front side member and the double cardan shaft, which must be at least 5 mm (see section «Steering»).