Check/face-grind cylinder head contact surfaces

AR01.30-B-7162F

Check/face-grind cylinder head contact surfaces

12.02.16



Disassemble

1

Remove the valve head.

AR01.30-B-5800E

2

Remove the spark plugs.

AR15.12-B-1010B

3

Remove the valves (3/4).

AR05.30-B-3511G



Check

4

Check the flatness of the bottom face of the head.

AR01.30-B-5800-12E

Maximum flatness deviation.

*BE01.30-B-1002-02F

5

Check the height (H) of the head.

Replace the head if the height (A) is less than the minimum allowable height.

*BE01.30-B-1001-02F

Grind

6

Grind the bottom face of the head (1).

Maintaining the roughness of the bottom face of the head is essential.

*BE01.30-B-1003-02F

The height (A) of the head cannot be lower the minimum value after grinding.

*BE01.30-B-1001-02F

 Grinding details:

Rotation        n = 1400/min (rpm)

Longitudinal feed 800-1000 mm/min

Vertical feed (each pass)           0.03mm

Cutting speed           Vs = 27 m/s

Grinding wheel diameter         d = 370mm

Grinding wheel type          Sivat 39C 36 F8 VK

      Norton 39C 36 F8 VK

 The rotation (n) is determined by the diameter (d) of the grinding wheel;

n = (Vs. 1000 . 60) : (d . 3.1416)



Measure

7

Place the valves (3/4) on the head and measure the distance (K) between the faces of the valves and the bottom face of the head.

Fit the intake and exhaust valves to their respective seats.

AR05.30-B-4100-01E

Distance (A) of the valves on the cylinder head.

*BE05.30-B-1001-01H



*001589532100



*343589004000

If the distance (A) of the valves cannot be obtained, rework the seats.

AR05.30-B-4511F



Assemble

8

Mount the valves (3/4) on the head.

AR05.30-B-3511G

9

Install the spark plugs.

AR15.12-B-1010B

10

Install the head.

AR01.30-B-5800E

Número

Denominação

Engine 476.93

BE01.30-B-1001-02F

Height of cylinder head

Standard

mm

113,9...114,0

minimum after machining

mm

113,4

BE01.30-B-1002-02F

Maximum permissible flatness deviation of cylinder head mating surface

mm

0,015

BE01.30-B-1003-02F

Maximum roughness at the cylinder head bottom surface

Rz

mm

0,016

Número

Denominação

Engine 476.93,

BE05.30-B-1001-01H

Distance between the valves faces and the head

Intake

mm

0.7...1.1

Exhaust

mm

0.7...1.1