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EM-204 < ON-VEHICLE REPAIR > [MR18DE] CYLINDER HEAD 4. Heat cylinder head to 110 ° to 130 ° C (230 ° to 266 ° F) by soaking in heated oil (A). 5. Press valve guide (1) from camshaft side to dimensions as CAUTION: Cylinder head contains heat, when working, wear protective 6. Apply reamer finish to valve guide using suitable tool (A). VALVE SEAT CONTACT • After confirming that the dimensions of valve guides and valves are within specifications, perform this proce- dure. • Apply prussian blue (or white lead) onto contacting surface of valve seat to check the condition of the valve contact on the surface. • Check if the contact area band is continuous all around the circum- ference. • If not, grind to adjust valve fitting and check again. If the contacting surface still has NG conditions even after the re-check, replace VALVE SEAT REPLACEMENT When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat. 1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess . PBIC3214J 2 : Cylinder head Projection “H” : 13.35 - 13.65 mm (0.526 - 0.537 in) PBIC3217J Standard : 5.500 - 5.518 mm (0.2165 - 0.2172 in) PBIC3215J SBIA0322E |