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4.2.7.3. Repair of a head of the block of cylinders

Head of the block of cylinders

1 – laying of a head of the block of cylinders,

2 – head of the block of cylinders,

3 – bolt of fastening of a head of the block of cylinders,

4 – lower plate of a spring,

5 – maslootrazhatelny cap,

6 – spring,

7 – hydraulic pusher,

8 – yoke,

9 – pushers,

10 – crackers,

11 – top plate of a spring,

12 – valves

Details of a hydraulic pusher

1 – bearing,

2 – plunger,

3 – ball,

4 – small spring,

5 – cover,

6 – big spring,

7 – cylinder

Prevention

When dismantling a head of the block of cylinders it is necessary to use the special device for compression of valvate springs. At assembly of a head of the block of cylinders it is necessary to use new maslootrazhatelny caps.


PERFORMANCE ORDER
1. Remove a head of the block of cylinders and clear it of dirt.
2. Using the device for compression of a spring of the valve, squeeze each spring and remove crackers from a valve end face. Remove the device for compression of a spring and take a plate springs and a spring. Flat-nose pliers, being careful, take a maslootrazhatelny cap from a valve rod. Take the lower plate of a spring. Keep in mind that the lower plates of a spring inlet (In) and final (And) the valve differ.
3. When the spring of the valve is compressed and the plate of a spring is not removed from crackers, it is necessary to strike with the hammer through wooden whetstone a spring cup that will lead to release of crackers.
4. Take the valve via the combustion chamber. Each valve you store in a separate plastic bag together with a plate springs, a spring, the lower plate of a spring and crackers for their further installation on the places.
5. Check a condition of saddles of valves. If they are burned, worn-out or have defects, they need to be replaced. If wear of a saddle of the valve is insignificant, they need to be ground in. Check the directing plugs of valves for wear, inserting into them a core of the valve and moving it aside. Movement has to be insignificant.
6. Using a metal ruler and the probe, check planeness of the interfaced surface of a head of the block of cylinders. At not planeness of more than 0,1 mm it is necessary to pereshlifovat a head, at the same time its height has to conform to requirements.
7. Check a condition of nests of pushers in a head of the block of cylinders. If nests of pushers are worn-out, replace a head of the block of cylinders. Also check a condition of openings in a head of the block of cylinders for supply of oil to hydraulic pushers.
8. On engines with the big term of operation, perhaps, pollution got in the hydraulic valve, the poet recommends to sort and clear every time when dismantling a head of the block of cylinders hydraulic pushers. Spare parts to hydraulic pushers do not go on sale therefore at failure of any detail of a pusher it is necessary to replace a hydraulic pusher in collecting (see rice. Details of a hydraulic pusher).
9. Remove the bearing from the top part of the cylinder of a hydraulic pusher, at the same time do not deform it. Take a plunger and a spring from the cylinder of a hydraulic pusher. An edge of the small screw-driver, being careful, uncover the basis of a plunger and take a spring and a ball.
10. Clear details of a hydraulic pusher kerosene or solvent and wipe or dry up pusher details. Check a condition of springs and, in the presence of damages or deformation, replace a hydraulic pusher assembled.
11. Oil details of a hydraulic pusher pure engine and collect a pusher.
12. Turn a plunger and insert a ball (1) into an opening (2) in the plunger basis.
13. Establish a small spring (1) in a plunger cover, then, being careful, establish a cover with a spring. Check that the spring draws in a ball (2).
14. Using a screw-driver edge, press a cover into a plunger flute.
15. Establish a big spring on a plunger cover.
16. Install a plunger with a spring in the cylinder of a hydraulic pusher.
17. Install the bearing (1) on the top part of a plunger and, being careful, hands squeeze a plunger before accurate fixing of the bearing in a flute of the cylinder of a pusher (2).
18. On some engines in a head of the block of cylinders the valve (is specified by an arrow) stabilizing pressure of the oil given to pushers of valves is installed. For extraction of the valve unscrew a carving stopper and a tap of M10 take the valve from a nest. At installation of the new valve observe purity that pollution did not get to oil canals.
19. Oil cores of valves engine and insert them on the places. The valve establish on those places where they were ground in.
20. Install the lower plate of a spring.
21. In a set of new maslootrazhatelny caps there is an adjusting plug which is installed on a core of the valve and protects working edges of maslootrazhatelny caps at their installation. Install the adjusting plug on a valve core, lower a maslootrazhatelny cap in fresh engine oil and establish it on a valve core into place, being careful not to damage its working edges. For installation of maslootrazhatelny caps use a special metal mandrel.
22. Establish a valvate spring and the top plate a spring.
23. Special adaptation squeeze a valvate spring and establish crackers in dredging of a core of the valve and grease them. Remove the device for compression of a spring. Repeat this operation on other valves.
24. Knock with the hammer through wooden whetstone on a valve core end face in order that all elements of the valve accurately were established on the places.
25. On l engines 1,6 (16 SH), 1,8 and 2,0 at the removed head of the block of cylinders replace a sealing ring of a casing of the thermostat.