Editing Replace wheel bearings (section)

===Rear===

====Removal====

* Apply handbrake and put car in 1st gear
* Undo the wheel bolts
* Jack up the car on the 'A' jacking point to raise the side of the car off the floor.
* For added security place some support next to the jack
* Remove rear wheel


* Remove split pin that secures castellated nut on driveshaft
* Use a breaker bar and deep size 30 socket or a size 30 ring spanner on the castellated nut and undo
* Remove the nut and washer
* Push the driveshaft into the hub to make sure it's free

* Release handbrake (keep car in gear!)
* Remove lock pin and spring from brake caliper 
* Remove front pad by tapping it down and inboard
* Use 6mm key to undo lower allen-bolt holding caliper to upright
* Use 17mm socket to undo upper bolt holding caliper to upright
* Remove caliper and position on top of diffuser/undertray (may need to undo P-clip for brake line)


* Remove M5 allen bolt holding brake disc on hub
* Lift brake disc from hub

If the driveshaft was stuck in the bearing earlier, now a 3-prong bearing puller can be used to press the driveshaft out of the bearing.


The hub and bearing pack are now visible and accessible. You will notice that there are pry slots on the outer edges of the bearing pack where it mounts to the upright.

* Disconnect speed sensor plug  if required
* Undo nut of outer trackrod joint to upright
* Disconnect trackrod taking care to note order and type of washers
* Swivel upright out carefully, making sure you do not pull the driveshaft from the CV joint
* Use 8mm allen key to undo the upper mounting plinth bolts that connect the balljoint to the upright
* Catch the camber shims that fall out and make note of the amount

Now the upright is only connected to the lower balljoint and can swivel relatively freely. 

* Swivel and tilt the upright so the splined end of the driveshaft can be withdrawn from the bearing
* Move driveshaft out of the way and re-attach upper plinth temporarily
* Swivel upright to it's (more or less) perpendicular to car

''Note from Scottish Scrutineer''
I omitted disturbing the upright as described above as, once the driveshaft was relaesed from the splines, I was able to fit a slim socket onto the bolts securing the bearing pack to the upright. 
[http://farm8.static.flickr.com/7409/8722282485_6231b49e5a.jpg]

* Depending on the type of bolt used, use a 19MM socket, 10MM allen head (or possibly E18 star socket, T55 torx head) and a breaker bar to undo the three bolts than hold the bearing pack to the upright
* Turn upright straight ahead
* Use a chisel and lump hammer on the pry slots to separate the bearing from the upright (rust and dirt will make it 'stick')
* If you will not re-use the old bearing you can also hit the flange from the back with a lump hammer (this damages the bearing, so do not use this if re-using the bearing!)
* After several hits on the pry slots the bearing pack will fall out of the upright


The old bearing pack is now removed from the upright and the new one can be installed.

====Installation====

* Using some coarse sandpaper on a fabric backing (eg. grit 60-80) work on the opening of the upright where the bearing pack sits to remove all of the rust and dirt buildup
* Clean out the bolt holes
* Clean and de-grease surfaces properly so no grit and dirt is present anymore
* Apply some anti-seize (eg. ceramic grease) along the edge of the hole so the new bearing pack will seat properly and can be removed easier later.
* Offer up the new bearing pack to the upright
* Depending on tolerances it may slide into place immediately or need pulling in by using the bolts (this seems to vary)
* If the original bolts are OK, insert these from the back of the upright and tighten them finger-tight
* Swivel upright to it's (more or less) perpendicular to car
* Using a torque wrench do up the bolts in a circular pattern until they are all tightened to 90Nm
* Check that the bearing pack sits flat and true on the upright

* Clean and de-grease the splined end of the driveshaft and make sure no dirt or grit is present
* Apply some anti-seize grease lightly to splines and mating surface of driveshaft
* Undo upper plinth bolts again
* Swivel and tilt the upright so the splined end of the driveshaft can be inserted into the bearing

* Re-fit camber shims and bolts holding upper mounting plinth to upright
* Use a torque wrench to tighten the bolts to 45Nm (8.8 grade bolts) or 60Nm (10.9 or 12.9 grade bolts)

* Re-fit trackrod and washers
* Torque nut of outer trackrod joint to upright (OEM spec nut and balljoint 74Nm, aftermarket, see supplier docs) 

* Re-connect speed sensor plug  if required


* Push the driveshaft fully through the hub so it seats properly
* Install washer and castellated nut 
* Use a torque wrench to tighten the castellated nut to 220Nm (if this turns the driveshaft/engine, wait until caliper re-fitted)
* Insert split pin that secures castellated nut on driveshaft and hammer ends over to secure it


* Clean brake disc inner mating surface to hub
* Install brake disc on hub
* Install M5 allen bolt holding brake disc on hub

* Push/screw brake caliper piston back
* Install caliper with inner pad in place (may need to replace P-clip for brake line if undone earlier)
* Refit allen-bolt and M10 bolt holding caliper to upright
* Use a torque wrench to tighten allen bolt to 28Nm and M10 to 45Nm
* Re-fit outer pad, spring and locking pin
* Apply brake pedal a few times to re-seat brake pads/pistons
* Apply handbrake
* If you were unable to set the correct torque on the center nut, try again now.
* Re-fit wheel

All Done!

[[Category:Suspension]]
[[Category:Lotus Elise]]
[[Category:S1]]
[[Category:S2]]