BMW 31321112210 Insert Shock Absorber

In order to have access to the suspension strut assembly you have to lift the front part of the car and place it on stands in order for the suspension to be hanging and not touching the floor. Loosen the brake caliper to take off the road wheel without disconnecting the hydraulic pipes; fasten it to the underbody to prevent the pressure on the brake hoses. Remove the one from the outer end of the control arm to the suspension strut and then removes the three nuts where three of them fasten wheel arch to the upper end of the suspension strut and then the assembly is removed. Whenever disassembling, first, check that suspension strut assemblies or damper units are put in pairs so as to get the right matching on the side. If necessary, it is necessary to pull off the brake disc and components of the wheel hub. A spring compressor tool is used in removing and refitting a coil spring in a manner that all spring pressure is released before undoing the locknut and removing the thrust bearing. In case of a bearing failure, then the bears has to be replaced in its entirety. When the spring compressor is free, take out the coil spring and the upper spring seat; where new coil springs are being used, ensure that they are of equal length, thickness and strength as the original ones where necessary. To remove the damper you must take out the sleeve and auxiliary spring and, using a special tool, unscrew the threaded ring thus enabling you to lift out the damper unit. When about to place in a fresh damper, deploy fifty cc of SAE 30 engine oil in the strut tube to facilitate heat exchange. The reverse of dismantling procedures indicates that the bleeder plate must be fitted rightly and there should be the sealing washer and the flat washer positioned above the thrust bearing before the applying of the locknut and the concave face of the sealing washer should face the bearing. In refitting perform the above process in reverse manner; lock the nuts on the steering arm to the suspension strut assembly by using new soft wire if the wheel hub assembly was taken apart; reassemble it and align. Last of all, deliver the brake caliper and then pump the brake pedal several times so as to get the right calibration.

These can include Nivomat self-levelling units or the conventional coil spring and damper units and the former can be had filled with the option of the later specification. Other changes included on older models include fitting of damper rings and rubber discs aimed at improving on ride comfort. It is agreed that suspension strut assemblies should always be renewed in pairs; because of alterations throughout the production period, it is recommended practice to take the old units to the spares department to ensure that they are matched with the replacements. In case of suspected faulty operation of Nivomat units, one has to contact BMW service station where checks using special equipment will be conducted. To reach this assembly you would have to elevate the rear of the car and support it properly, and set a Jack under the trailing arm to relieve the strut of weight. Loosen the suspension strut from the bracket and take out the upper centring bush of the wheelarch. While refitting, the spacer rings are placed in reverse of removal, and it is certain that the rubber protrusions are in the right position. When dismantling, it would be appropriate to use a compressor tool and the removal of the unit as well as compressing the coil spring and the removal of the sub-assemblies accompanied by tests and replacement of worn out rubber bushes. When assembling, check and make sure that the parts are well aligned as well as the screws well tightened. For later type damper rings, it can be modified fitted for the earlier models by the changed upper mounting studs and the enlarged strut upper mounting holes. It is also important to note that the modification of Nivomat units to spring strut type is possible by the removal of the anti-roll bar: then original components are replaced with new parts, and the modified Nivomat unit is reassembled and installed.