Before assembly, each crankshaft must be checked on a magnetic or ultrasonic flaw detector for the absence of micro and macro cracks; as well as the compliance of the selected set of main bearing shells with the size of the main journals

The ignition distributor sensor (1908.3706) is installed on the ZMZ-402 engine - contactless, with a sensor (generator) of control pulses and built-in vacuum and centrifugal ignition timing controllers

Diesel lubrication system - combined

Combined engine lubrication system: oil is supplied to the rubbing surfaces of parts under pressure and splashing

K-151, K-151D carburetors are installed on engines of model 402 and 4021.

The K-151 carburetor (Fig. 1) consists of three main detachable parts connected through sealing gaskets with screws

Drain the engine oil

Drain the engine coolant and remove the radiator.

Disconnect the intake pipes from the exhaust manifold

The VAZ-2123 engine was developed on the basis of the VAZ-21214 engine, which, in turn, is a modernized VAZ-21213 engine and complies with Euro II toxicity standards

Repair of the cylinder head is carried out during general engine repairs and when replacing the cylinder head gasket.

To compensate for the thermal expansion of the valve, the gap between the end of the valve stem and the camshaft cam is structurally set

The piston of the 1st cylinder is set to the position of the top dead center (TDC) of the compression stroke so that when carrying out work related to the removal of the timing chains, the installation of the gas distribution phases is not disturbed