RX8 Concentric Release Fitting Guide

RX8 Concentric release fitting guide for 5 and 6 speed boxes.

6 Speed

Please note that this setup is to suit a 90mm clutch height from block to fingers. A stop may be required on your clutch pedal to stop over extension of the slave cylinder. When tested with a 0.75 master cylinder, 18mm of master cylinder stroke was enough to release the clutch.

  1. Remove the input shaft cover and cut off the sleeve and grind or machine down flush so that the cover is 23mm thick. With the input shaft cover laid on the bench, put the new bearing plate on top of the input shaft and then offer the clutch cylinder on to the plate. Check there is minimal clearance between the cylinder and the input shaft cover. If there isn’t any clearance then remove a little bit more material until there is minimal clearance. If there is too much clearance it can pop the cylinder. Cut off the original pivot point.

                                                                            

  1. Refit the input cover ensuring to use new sealer. Flange sealant works best.
  2. Bolt on the new release bearing mounting plate using the 1 off countersink bolt and the 4 off cap head bolts. Tighten these up and refit the original 3 bolts in the bottom.
  4. Pre bleed the slave cylinder by fitting the pipe to the cylinder that runs from the master cylinder. Submerge the master cylinder end in some brake fluid. Slowly squeeze and release the slave cylinder until no bubbles come out and all air is expelled.
  5. Bolt the cylinder to the bracket using the 3 small M6 cap head bolts.

 

 

 

5 Speed

  1. Remove the input shaft cover
  2. Fit the seal keep by tapping in place

 

                                                                 

  1. Bolt on the slave cylinder bracket using the 4 off M8 countersunk bolts.

                                                             

  1. Pre bleed the slave cylinder by fitting the pipe to the cylinder that runs from the master cylinder. Submerge the master cylinder end in some brake fluid. Slowly squeeze and release the slave cylinder until no bubbles come out and all air is expelled.
  2. Fit the slave cylinder using the 3 off M6 bolts. Pipe fitting towards the top.