3.24. Removal and dismantling of a head of the block of cylinders of the vpryskovy engine

 PERFORMANCE ORDER

We remove a head of the block of cylinders for replacement of laying, repair of the mechanism of the drive of valves and the head, and also at full dismantling of the engine.

Work is carried out on a viewing ditch or the elevator.

For replacement of laying of a head or conrod and piston group of the engine we remove a head of the block of cylinders from the engine assembled with a receiver, an inlet pipe and a final collector.
For dismantle of a head of the block of cylinders:

Head "on 13" we turn off the bolt of fastening of a head of the block of cylinders close to an ignition module arm.

Head "on 12" we turn off ten bolts of fastening of a head to the block of cylinders.

We take out bolts.

We remove a head of the block of cylinders assembled with a final collector, a receiver and an inlet pipe with a fuel stage.

The head of the block of cylinders can also be removed from the engine, previously having dismantled a receiver (see Removal of a receiver of the vpryskovy engine), an inlet pipe and a final collector (see Replacement of laying of an inlet pipe and a final collector of the vpryskovy engine).

We remove a head of the block of cylinders without final collector and an inlet pipe.

We remove laying of a head of the block of cylinders.

We establish a head of the block of cylinders on a workbench.

Head "on 10" we turn off two nuts of fastening to a head of the block of the bringing heater radiator branch pipe...

... also we remove it.

We remove sealing laying.

Head "on 13" we turn off two nuts of fastening of the taking-away cooling system shirt branch pipe...

... also we remove a branch pipe with the sensor of temperature of cooling liquid of system of injection.

We remove sealing laying of a branch pipe.

When dismantling the valvate mechanism...

... we enclose under a plate of the rassukharivayemy valve an emphasis — wooden whetstone.

Rassukharivayem the valve (see Replacement of maslootrazhatelny caps of the mechanism of gas distribution)...

... also we take out the valve from the directing plug of a head of the block of cylinders.

In the same way we dismantle other valves.
Assembly and installation of a head of the block of cylinders is carried out in the return sequence.
Before installation of valves we clear them of a deposit and we oil cores of valves engine.
Having assembled the valvate mechanism...

... we strike with the hammer with plastic brisk blow to end faces of valves for more reliable fixing of crackers (the wooden emphasis at the same time needs to be removed from under a plate of the valve).

Before installation of branch pipes of the cooling system we clear the privalochny planes of branch pipes and a head of the block of the remains of old laying.
We establish new laying of branch pipes, having applied on them a thin film of sealant.
We clear the privalochny planes of a head and the block of cylinders of the remains of old laying, dirt and oil.
With the syringe with a needle or a rubber pear it is deleted from fixing openings of the block of cylinders oil and cooling liquid.

We establish laying and a head of the block of cylinders on two aligning plugs.

Installing a head on the block of cylinders, we pass a chain for a wire through an opening in a head.

Having established bolts of fastening of a head of the block of cylinders, we tighten them in the order shown in the drawing.

For ensuring reliable consolidation and an exception of need of tightening of bolts at maintenance of the car we tighten bolts in four receptions:

The 1st reception – we tighten bolts 1–10 moment of 20 N. of m (2,0 кгс.м);
The 2nd reception – bolts 1–10 we tighten the moment 69,4–85,7 N. of m (7,1–8,7 кгс.м), and a bolt 11 – m 31,4–39,1 N.' moment (3,2–4,60 кгс.м).
Then dovorachivay bolts 1–10 on 90 ° (the 3rd reception) and for 90 ° (the 4th reception).