Camshaft Drive Diagram: 1 - restrictive finger; 2 - chain; 3 - tensioner shoe; 4 - chain tensioner; 5 - camshaft sprocket; 6 - chain damper; 7 - an asterisk of the oil pump drive shaft; 8 - crankshaft sprocket.
Removing the cylinder head cover (see Replacing the cylinder head cover gasket).
Turn the crankshaft clockwise until the mark on the camshaft sprocket matches the mark on the camshaft bearing housing (see Adjustment of thermal gaps in the valve mechanism of the carburetor engine).
Remove the fan cover of the carburetor engine (see Removal of a casing of the fan of the carburetor engine).
Remove the water pump drive belt (see Tension adjustment and replacement of the coolant pump drive belt).
Removing the crankshaft pulley (see Replacing the front crankshaft oil seal).
Unlock and unscrew the camshaft sprocket bolt, loosening the chain tension, remove the sprocket with the chain (see Removing the camshaft and valve levers of the carburetor engine).
Remove the chain from the camshaft sprocket.
We unscrew the three bolts securing the oil pan to the camshaft drive cover (see Removing the oil pan and engine oil pump on a car). For clarity, we show the operation of removing the chain on a dismantled engine.
key «on 10» unscrew the three nuts and six bolts securing the camshaft drive cover to the cylinder block.
Remove the camshaft drive cover.
key «at 17» unscrew the bolt securing the tensioner shoe...
...and remove the shoe.
Using a chisel, we bend the edge of the lock washer of the bolt securing the oil pump drive sprocket.
key «at 17» unscrew the bolt securing the oil pump drive sprocket.
We remove the bolt with washers.
Let's take an asterisk.
key «on 10» unscrew the chain stop pin and remove it.
Remove the camshaft drive chain.
We remove the asterisk from the toe of the crankshaft in the same way as on an injection engine (see Removing the injection engine camshaft drive chain and sprockets).
Before installing the chain, we combine the mark on the crankshaft sprocket with the mark on the cylinder block,...
... and a mark on the camshaft sprocket with a mark on the bearing housing.
Install the camshaft drive parts in reverse order.
Having installed the chain, we stretch it (see Adjusting the tension of the camshaft drive chain of the carburetor engine).
Having turned the crankshaft clockwise two turns, we check the coincidence of the installation marks.
Adjust the ignition timing.