Pic. 2-53. Section of the cylinder head on the exhaust valve: 1 - cylinder head; 2 - exhaust valve; 3 - oil deflector cap; 4 - valve lever, 5 - camshaft bearing housing; 6 - camshaft 7 - adjusting bolt; 8 - bolt lock nut; A - clearance between the lever and the camshaft cam
Adjust the gaps on a cold engine, after adjusting the chain tension. After adjustment, the gap should be 0.14-0.17 mm.
Adjust in the following order:
- turn the crankshaft clockwise until the mark on the camshaft sprocket matches the mark on the bearing housing, which will correspond to the end of the compression stroke in the fourth cylinder. In this position, the clearance at the exhaust valve of the 4th cylinder is adjusted (8th cam) and inlet valve of the 3rd cylinder (6th cam);
- loosen the locknut of the lever adjusting bolt;
- insert a flat feeler gauge A.95111 with a thickness of 0.15 mm between the lever and the camshaft cam and a wrench, tighten or unscrew the bolt, then tighten the lock nut until the feeler gauge enters with a slight pinch when the lock nut is tightened (pic. 2-54);
- after adjusting the gap at the exhaust valve of the 4th cylinder and the intake valve of the 3rd cylinder, rotate the crankshaft 180°in succession and adjust the gaps following the sequence shown in Table 2-5.
Pic. 2-54. Checking the gap between the levers and camshaft cams: 1 - probe A.95111; 2 - adjusting bolt; 3 - adjusting bolt locknut