Valve timing mechanism — design description [Toyota Dyna Y50]

The gas distribution mechanism (GDM) camshaft and timing chain.
1 - Crankshaft pulley,
2 - Crankshaft pulley fastening nut (M3=157 Nm),
3 - Camshaft drive chain cover,
4 - Camshaft drive sprocket,
5 - Bolt for fastening the camshaft drive sprocket (MZ=90 Nm),
6 - Purpose of the camshaft drive,
7 - Crankshaft sprocket,
8 - Gasket,
9 - Front crankshaft oil seal,
10 - Timing chain tensioner,
11 - Camshaft thrust washer,
12 - Cylinder head cover (with gasket),
13 - Sealing washer,
14 - Rocker arm axle assembly,
15 - Barbell,
16 - Pusher,
17 - Camshaft,
18 - Timing chain tensioner,
♦ - Parts that cannot be reused.