Setting the piston of the first cylinder to the TDC position of the compression stroke (VAZ-2115)

In order to avoid disturbing the valve timing during work related to removing the camshaft drive belt, the piston of the 1st cylinder is set to the position TDC (top dead center) compression stroke. If the valve timing is incorrect, the engine will not operate normally.

Set the TDC according to the mark on the camshaft pulley (when installed according to the marks on the flywheel or crankshaft pulley, the piston of either the 1st or 4th cylinder may be in this position). After this, be sure to check that the marks on the flywheel or on the toothed pulley of the crankshaft match (if the generator drive pulley is removed). If the marks on the flywheel or crankshaft pulley do not match, then the valve timing is out of alignment (piston of the 1st cylinder is not set to TDC). In this case, it is necessary to remove the camshaft drive belt and turn the crankshaft until the marks are aligned.

Warning! Turn the crankshaft only by the bolt that secures the pulley to it (it is prohibited to turn the crankshaft by the camshaft pulley).

Helpful Hint: Since it is inconvenient to turn the crankshaft by the pulley mounting bolt, you can do it in the following ways:

Engage any gear (preferably IV) and slowly roll the car until the mark on the camshaft pulley aligns with the mark on the rear cover of the camshaft drive belt.

Engage any gear and lift one of the front wheels. Then turn the lifted wheel until the mark on the camshaft pulley matches the mark on the rear camshaft drive belt cover.

The TDC marks are applied to the toothed pulley of the camshaft (protrusion) and to the rear cover of the camshaft drive belt (antenna).

In addition, marks are applied to the flywheel (risk) and to the scale of the rear shield of the clutch housing (v-neck). For clarity, the gearbox has been removed.

Additionally, marks are applied to the toothed pulley of the crankshaft (dot) and the oil pump cover (v-neck). These marks are only visible when the generator drive pulley is removed.

You will need: a 17 mm open-end wrench, a 10 mm socket wrench.

1. Disconnect the wire from the "-" terminal of the battery.

2. Set the gear shift lever to neutral position and place wheel chocks under the vehicle wheels.

3. Remove the right front wheel and the right mudguard of the engine compartment.

4. Open the hood and remove the three screws securing the front camshaft belt cover. Note: the screws on the side of the cover also secure the wire holders. Remove the front cover.