1. Loosen cap nut 1 (see fig. Chain tensioner section) tensioner. In this case, the rod 3 is released and the chain is tensioned by the shoe 7 (see fig. Diagram of the camshaft drive mechanism and auxiliary bodies), which is acted upon by the spring 8 (see fig. Chain tensioner section).
2. Turn the crankshaft 1-1.5 turns in the direction of rotation and stop in such a position that the mark on the camshaft bearing housing is against the mark on the camshaft sprocket (see fig. Checking that the alignment mark on the camshaft sprocket matches the mark on the bearing housing). In this case, the tensioner spring acting on the shoe will automatically adjust the chain tension.
3. Tighten the nut 1 of the tensioner, due to which the rod 3 is clamped by the collets of the cracker 9, and when the engine is running, only the spring 5 acts on the plunger 7. This spring presses the plunger from the head of the rod 3, and oil flows into the gap between them during engine operation, which plays the role of a shock absorber during chain strikes.
4. Due to the guaranteed gap of 0.2–0.5 mm between the rod 3 and plunger 7, spring 8 comes into action when the chain is strongly struck.