STRUCTURE AND OPERATION 2. Mitsubishi 4M50 Cylinder Head, Cylinder Head Gasket, Camshaft, and Camshaft Frame
• The camshaft is supported at its journals from below by the cylinder head and retained from above by the camshaft frame. • The upper and lower camshaft bearings are identical, but cannot be interchanged when they are reinstalled. • The exhaust camshaft and the intake camshaft have identical gears but different cams. • The thirteen shortest bolts and four shorter bolts fasten the camshaft frame onto the cylinder head. • The two long bolts fasten the camshaft frame to the front case.
2.1 Cylinder head gasket • Select and use a cylinder head gasket of a thickness that can accommodate the piston projection. • The size (thickness) class of the gasket can be identified by the shape of the notches and size mark cut on the edge of each gasket.
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