2.2.12. Removal and installation of a chain of the drive of the mechanism of gas distribution and natyazhitel of a chain

Fig. 2.72. Details of a chain of the drive of the mechanism of gas distribution and natyazhitel of a chain: 1 – a cam-shaft drive asterisk on cranked to a shaft; 2 – LJ gas distribution mechanism drive chain; 3 – gas distribution mechanism drive chain guide No. 1; 4 – natyazhitel of a chain of the drive of the mechanism of gas distribution; 5 – block of the regulator of a natyazhitel of a chain of the drive of the mechanism of gas distribution; 6 – bolt of fastening of the regulator of a natyazhitel of a chain; 7 – bolt of fastening of a natyazhitel of a chain; 8 – a bolt of fastening of the directing chain

Uncover a gas distribution mechanism drive chain.

Fig. 2.73. Working contour of a chain of the drive of the mechanism of gas distribution

Combine tags on asterisks of a cam-shaft of the drive of inlet and final valves 1 with grooves 2 on a head of the block of cylinders rotating a bent shaft (fig. 2.73).

Remove the regulator of a natyazhitel of a chain of the drive of the mechanism of gas distribution 3.

Remove a natyazhitel of a chain of the drive of the mechanism of gas distribution 4.

Remove a gas distribution No. 15 mechanism drive chain guide.

Remove a chain of the drive of the mechanism of gas distribution 6 with an asterisk of the drive of a cam-shaft of a bent shaft 7.

ATTENTION After the chain of the drive of the mechanism of gas distribution is removed, never turn a bent shaft and cam-shafts independently from each other on a corner more, than it is allowed in the section "Installation". Otherwise, there can be a contact of pistons and valves or valves among themselves, at the same time details of pistons and valves can be damaged.

Fig. 2.74. Installation of a chain of the drive of the mechanism of gas distribution

Check that, adjusting tags 1 on asterisks of cam-shafts of the drive of inlet and final valves are combined with grooves 2 on a head of the block of cylinders, as shown in the figure 2.74.

Establish a spline 3 and turn a bent shaft so that the spline appeared on a shaft from above.

"a": 90 °.

ATTENTION After the chain of the drive of the mechanism of gas distribution is removed, never turn a bent shaft and cam-shafts independently from each other on a corner any more ("a", "b"), than it is shown in the figure 2.74. Otherwise, there can be a contact of pistons and valves or valves among themselves, at the same time details of pistons and valves can be damaged.

On tags on a cam-shaft asterisk within 15 ° from grooves on a head of the block of cylinders to the right or to the left.

"b": 15 °.

On a spline on cranked to a shaft within 90 ° to the right or to the left.

Establish a chain of the drive of the mechanism of gas distribution having combined a dark blue plate of 1 chain of the drive of the mechanism of gas distribution with a tag 2 on a cam-shaft asterisk, and then having combined a dark blue plate 3 and a triangular tag 4, as shown in the figure 2.73.

Establish an asterisk of a bent shaft in a chain of the drive of the mechanism of gas distribution having combined a gold plate 5 chains of the drive of the mechanism of gas distribution with a tag 6 on an asterisk of a bent shaft. Then establish an asterisk of a bent shaft with a chain on a bent shaft.

Apply engine oil on the surface of friction of a guide No. 11 of a chain of the drive of the mechanism of gas distribution and establish it, as shown in the figure 2.76. Tighten bolts of the inhaling directing nominal force.

Fig. 2.75. Gas distribution mechanism drive chain guide No. 1 bolt

Moment of an inhaling of a bolt of a guide No. 1 of a chain of the drive of the mechanism of gas distribution (a): 9 N · m.

Fig. 2.76. Installation of a natyazhitel of a chain 1

Apply engine oil on the surface of friction of a natyazhitel of a chain 1 and establish a natyazhitel of a chain and the plug. Tighten a bolt of a natyazhitel the nominal force of an inhaling (fig. 2.76).

Moment of an inhaling of a bolt of a natyazhitel of a chain of the drive of the mechanism of gas distribution (a): 22 N · m.

Check coincidence of adjusting tags 1 on asterisks of cam-shafts of the drive of inlet and final valves with dark blue plates 2 chains of the drive of the mechanism of gas distribution, and also coincidence of an adjusting tag 3 on an asterisk of a bent shaft with a gold plate 4 chains of the drive of the mechanism of gas distribution.

Fig. 2.77. Installation of a plunger

Screw a plunger 1 rotation of the regulator of a natyazhitel of a chain of the drive of the mechanism of gas distribution 2 in the direction of an arrow and establish a clamp 3 (wire) for deduction of a plunger on the place (fig. 2.77).

Install the regulator of a natyazhitel of a chain of the drive of the mechanism of gas distribution 1 with a clamp of 2 (fig. 2.77).

Fig. 2.78. Installation of the regulator

Tighten regulator bolts the nominal force of an inhaling, and then remove a clamp from the regulator of a natyazhitel of a chain (fig. 2.78).

Moment of an inhaling of a bolt of the regulator of a natyazhitel of a chain of the drive of the mechanism of gas distribution (a): 11 N · m.

Fig. 2.79. Check of coincidence of tags 1 on asterisks of a cam-shaft of the drive of inlet and final valves with grooves 2 on a head of the block of cylinders

Apply engine oil on a gas distribution mechanism drive chain, then turn a bent shaft clockwise on 2 turns and check coincidence of tags 1 on asterisks of a cam-shaft of the drive of inlet and final valves with grooves 2 on a head of the block of cylinders, and also an arrangement of a spline 3 in the top part of a bent shaft, as shown in the figure 2.79.

If tags of a chain of the drive of the mechanism of gas distribution and the corresponding adjusting tags do not coincide, adjust the provision of asterisks and a chain of the drive of the mechanism of gas distribution.

Establish a gas distribution mechanism drive chain cover.