We set the camshaft to the position corresponding to the end of the compression stroke of the 4th cylinder (see Adjusting the clearance between the levers and the camshaft cams).
Using a 13 mm spanner, loosen the chain tensioner cap nut. Using a mounting blade against the tensioner shoe, press the tensioner rod and secure it by tightening the cap nut (the radiator hose has been removed for clarity).
Bend back the edge of the lock washer on the camshaft sprocket mounting bolt.
We engage the gear and use a 17 mm wrench to unscrew the sprocket bolt.
We remove the bolt together with the washers.
We remove the sprocket together with the camshaft chain and place it in the cylinder head. To prevent the chain from jumping, we tie it to the sprocket.
Using a 13 mm spanner, unscrew the nine nuts securing the camshaft bearing housing.
We remove the housing assembly with the camshaft from the studs.
Using a 10 mm spanner, unscrew the two bolts securing the thrust flange to the body...
...and remove the flange.
We remove the camshaft from the housing.
We lift the valve lever, release it from the spring. We remove the lever.
We remove the lever spring.
The original can be seen on the website (www.vazbook.ru)
We install the camshaft in the reverse order, while its key should be on the left side (when viewed from the front).
Tighten the bearing housing mounting nuts in the order shown in the figure.
The order of tightening the nuts securing the camshaft bearing housing.