Valve Seat Replacement Procedure

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Cut the valve seat from the inside to thin the wall thickness. Then, remove the valve seat.

Fig 1: Thinning Wall Thickness
Rebore the valve seat hole in the cylinder head to a selected oversize valve seat diameter.
Intake seat ring hole diameters 0.3 oversize: 36.300 - 36.325 mm (1.4292 - 1.4301 inches)

Exhaust seat ring hole diameters 0.3 oversize: 32.300 - 32.325 mm (1.2717 - 1.2726 inches)

Fig 2: Identifying Valve Seat Height
Before fitting the valve seat, either heat the cylinder head up to approximately 250° C (482° F) or cool the valve seat in liquid nitrogen, to prevent the cylinder head bore from galling.
Using a valve seat cutter, correct the valve seat to the specified width and angle.
See "VALVE SEAT RECONDITIONING PROCEDURE " .