To prevent damage to the cylinder head, wait until the engine has cooled down before removing it
During the operation of the engine, some malfunctions may occur:
- - engine does not start;
Checking the thermostat
After starting a cold engine, the main thermostat valve is closed, and the upper part of the thermostat housing in good condition remains colder than other parts of it for some time
We replace the timing belt every 75,000 km or if it shows signs of wear and undercutting of teeth, cracks, delamination of rubber and fabric base
You will need: a hex wrench “6”, heads “12”, “13”, “14”, a small chisel, a hammer
Drain the engine oil and coolant, remove the mudguard and accessory drive belt
An external sign of wear on the valve stem seals is the short-term appearance of blue smoke from the exhaust pipe after starting the engine, as well as when braking the engine after a long drive under load.
The ZMZ-406 engine is equipped with a microprocessor ignition system, which consists of a control unit for fuel injection and ignition systems, two ignition coils of types 30.3705 or 301.3705, candles, high-voltage and low-voltage wires
The gas distribution mechanism is designed to ensure the intake of fresh air charge into the cylinders and the release of exhaust gases from them
Microprocessor engine control system ZMZ-406:
- - controls the power supply of the fuel pump;
To compensate for the thermal expansion of the valve stem, a gap is required between the camshaft cam and the valve lifter
Engine - gasoline, four-stroke four-cylinder in-line with an overhead camshaft and liquid cooling
Replacing the front crankshaft seal
A sign of the need to replace the front crankshaft oil seal is an oil leak through its edge
Timing drive with idler
Remove the front timing belt cover
High voltage wires are made of PV PPV wire with a diameter of 8 mm
A helix of nichrome wire is wound on a core with a ferrite filler
Usually, the timing belt is designed to operate for 30,000 km
It is necessary to inspect the belt at each maintenance and check its tension
Disassembly of the engine is presented in the article - "Disassembly of the VAZ-21126 engine"
Defection of engine parts is presented in the article - "Defection of engine parts VAZ-21126"
