Conditionally, we remove the gear wheel and the drive shaft of the oil pump from the engine dismantled from the car.

To remove the oil pump drive gear, unscrew the generator mounting bracket (Disassembly of the VAZ-2123 engine).

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

Grasping the edge of the retainer of the oil pump drive gear with the pliers, remove the retainer from the cylinder block socket.

The connection is sealed with a rubber ring fitted over the head of the retainer.

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

We insert a wooden conical mandrel with an interference fit into the spline hole of the oil pump drive gear and remove the gear from the cylinder block by turning it counterclockwise.

When installing the gear, we put it on the spline shank of the oil pump shaft and engage with the gear of the oil pump drive shaft, holding the gear with a screwdriver, take out the wooden frame

To remove the oil pump drive shaft, remove:

- pulley of drives of auxiliary units;

- timing cover;

- timing chain.

We remove the oil pump drive gear from the cylinder block.

Remove the oil pump drive sprocket for this:

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

With a chisel or screwdriver, bend the lock washer of the sprocket bolt

With a 17 key, unscrew the sprocket mounting bolt.

We hold the sprocket from turning with a screwdriver, resting through the hole in the sprocket on the head of the bolt fastening the thrust flange of the roller.

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

Removing the bolt with washers

Remove the asterisk

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

Using the "10" head, unscrew the two bolts securing the thrust flange of the roller to the cylinder block and remove the thrust flange

We take out the oil pump drive shaft from the cylinder block socket

Fault detection of the roller and gear wheel of the drive of the oil pump

There should be no dents or scratches on the surfaces of the bearing journals of the roller and on the working surface of the eccentric.

Chipping is not allowed on the teeth of the gears of the drive of the oil pump and the ignition distributor; in case of such a defect, replace the gears and the roller with new ones.

Oil pump drive shaft bushings.

Check the inner diameter of the bushings, their pressing into the sockets, as well as the alignment of the lubrication hole in the front bushing with the bore in the cylinder block (turning the bushing).

The inner surface must be smooth and free from scoring.

Having measured the diameters of the roller and bushings, determine the clearances between the bushings and the bearing surfaces of the roller.

If the clearance exceeds 0.15 mm (wear limit), or if the surfaces of the bushings are damaged or if they are loosely pressed, replace the bushings with new ones.

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

When replacing, use for both removal and installation, a mandrel A.60333 / 1/2, observing the following:

- the bushings must be pressed into the seats, while the oil hole in the front bushing must be opposite the channel in the cylinder block;

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

- after pressing in, the bushings must be finalized and brought to the inner diameter (dimensions are given in the figure).

To ensure complete alignment of the roller bushings, a reamer A.90353 is used for their finishing, which simultaneously processes both bushings.

Oil pump drive gear bushing

Check the fit of the bushing. The inner surface must be smooth and free from scoring, otherwise replace the sleeve.

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

To press out and press in the sleeve, use a mandrel A.60Z26 / I.

After pressing in the sleeve, reamer to 16.016-16.037 mm.

Снятие и дефектация шестерни и валика привода масляного насоса ВАЗ-2123

Install the oil pump drive shaft in reverse order.

We carry out further assembly in the reverse order.

Replace the torn or lost elasticity rubber ring of the retainer with a new one.