Fig. 84. Camshaft drive.
1 - exhaust camshaft,
2 - chain tensioner,
3 - intake camshaft,
4 - guide sprocket,
5 - safety bolt,
6 - intermediate sprocket,
7 - double-row roller chain,
8 - crankshaft sprocket,
9 - chain tensioner shoe axle,
10 - chain tensioner shoe,
11 - hydraulic chain tensioner.
The endless chain transmits rotation from the sprocket on the crankshaft to the two camshaft sprockets, the guide and intermediate sprockets, and is supported by a damper. The chain tension is provided by a hydraulic tensioner located in the cylinder block, acting on the shoe.
The camshaft sprockets are keyed and secured with bolts.