5.8.2. Replacement of hydrocompensators of gaps in the mechanism of the drive of valves

Hydrocompensators of gaps in the mechanism of the drive of valves represent self-regulating support of the press levers transferring effort from the camshaft to valves and perform function of elimination of gaps in the drive.

Operation of the hydrocompensator is based on the principle of incompressibility of the engine oil which is constantly filling an internal cavity of the hydrocompensator during the operation of the engine and moving its plunger at emergence of a gap in the valve drive, providing continuous contact of the lever of the drive of the valve with a camshaft cam without gap. Thanks to it need of adjustment of valves at maintenance disappears.

Practically all malfunctions of hydrocompensators diagnose on the characteristic noise published by the gas-distributing mechanism on various power setting.

For replacement of hydrocompensators the head of the block of cylinders can be not removed from the engine. It is enough to remove the camshaft case only. However laying of a head of the block is recommended to be replaced after that surely new as the case of the camshaft and a head of the block are attached to the block by the same bolts and at a repeated inhaling of bolts old laying of a head of the block can not provide tightness of connection.

It will be required to you: all tools necessary for removal of the case of the camshaft (see. "Removal, troubleshooting and installation of the camshaft").

    

NOTE Perform work in 15–30 min. after an engine stop that oil pressure in hydrocompensators decreased.

1. For replacement of the hydrocompensator remove the camshaft case (see. "Removal, troubleshooting and installation of the camshaft").

    

NOTE Unlike work on removal of the camshaft in this case it is not necessary to remove the coil of ignition and its arm from the camshaft case.

2. Remove press the lever and the cracker established on a valve core.

NOTE If there is no need of replacement, the cracker can be not removed.

3. Take the hydrocompensator from a block head nest.

NOTE The hydrocompensator is installed in a head nest with a small tightness and can be easily taken without use of any tool.

4. Grease the new hydrocompensator and a nest in a head of the block of cylinders with engine oil and install the hydrocompensator in a nest.

5. Similarly replace other hydrocompensators.

6. Establish a head of the block of cylinders and a detail of the drive of the gas-distributing mechanism as it should be, the return to removal.

    

NOTE After replacement of the hydrocompensator at the first start-up the engine can until work short time with the increased noise until the hydrocompensator is pumped over.