Cylinder Head Gasket The multi-layed steel cylinder head gasket has cylinder specific water flow cross-sections for uniform coolant flow. There are three thicknesses of gasket available, selected according to the determined piston clearance. The thickness of the gasket is identified by the number of identification holes, one hole being the thinnest and three holes being the thickest. 1 6 M12 7769 3 7 2 5 4
ENGINE – TD6 DESCRIPTION AND OPERATION 12-1-11 Vacuum Pump The vacuum pump is located on a support bracket at the front RH side of the cylinder head and is driven from the exhaust camshaft. Camshafts There are two camshafts, exhaust (right) and intake (left. Each camshaft is maintained in position by seven bearing caps. Each bearing cap is fixed to the cylinder head by two bolts. The camshafts are made using the clear chill casting process and are hollow cast. The cam lobes have a negative cam radius. The camshafts are driven from the crankshaft using a simplex chain and sprocket arrangement. Each camshaft has twelve machined lobes for operating the inlet and exhaust valves through lash adjusters and roller- type finger levers.