MX-5 Miata Mazdaspeed L4-1.8L DOHC Turbo (2004)
11. Using a fine screwdriver, pry up the adjustment shim through the notch on the tappet. Remove the shim by using a magnet.
12. Select proper adjustment shim.
New adjustment shim = Removed shim thickness + Measured valve clearance - Standard valve clearance (IN: 0.21 mm (0.0111 inch), EX: 0.31
mm (0.0122 inch))
13. Push the selected shim into the tappet.
14. Loosen bolt C to allow the tappet to move up.
15. Loosen bolt B and remove the SST (body).
16. Remove the SSTs and tighten the camshaft cap bolts.
Tightening torque 11.3 - 14.2 Nm (115 - 145 kgf-cm, 100 - 125 inch lbs.)
17. Inspect for the valve clearance.