2013-01-12

Front damper spherical bearing play

There was a play in the joint between the rocker arm and damper in the front suspension, noticeable when I jack the car up, removed the wheel and lift the suspension at the hub. I decided to change the spherical bearings.
  • First step was to remove the dampers. Remove push rod from lower wishbone. Undo damper bolts starting with the lower bolt.
  • The misalignment spacers on one of the dampers was tough to remove, but eventually they got out with some help from a blow torch. Warning! Heating bearings could give off hazardous fumes. These fumes can be harmful to the eyes and to the lungs, if inhaled. Source: SKF.
  • Remove retainer circlip with a pointy sharp tool.
  • Carefully remove bearing using a socket and a hammer.
  • Bilstein part number E4-B46-610. Can be obtained from Caterham Parts or directly from Bilstein. You can also find similar bearings at your local bearing shop in different qualities. 
  • When I fitted my new bearings I noticed a small play between the new bearing and housing. I used Loctite 648 retaining compound as glue. I don't want any movement there, or the shocks could easily be ruined. I hope the new bearings will outlive the shocks, as they probably is going to be tough to remove in the future. (Heating them might work)
  • Reassemble. A good opportunity to replace the bolts and nuts as well. 
Note: I have the "race spec suspension" on my car. The procedure and part numbers may be different on the road spec dampers.

I changed the upper bearings on both sides as I thought that would be enough. Now when the suspension is reassembled I can still feel a small play in one of the lower bearings, sigh...



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