Replace valve seat rings

AR05.30-B-3831B

Replace valve seat rings

12.02.16



Remove and install

1

Removing valves

AR05.30-B-3511B

2

Check the valve guide for wear

AR05.30-B-3731A

Valve guide inside diameter.

*BE05.30-B-1003-02C



*100589102100

3

Remove the valve seat insert (1/2) from the cylinder head (3).

The valve seat insert can also be removed by machining it to a thickness of 0.5 mm, removing it next with a suitable chisel.

AR05.30-B-3831-01B



*000589293300



*000589303300



*000589343300

4

Check the condition and the dimensions of the seat insert basic bore in the cylinder head (3)

The valve seat insert interference fit must be obtained unconditionally.

Basic bore (B) for the intake valve seat insert.

*BE05.30-B-1001-03B

Basic bore (B) for the exhaust valve seat insert.

*BE05.30-B-1002-03B

Depth (C) of the valve seat insert basic bore.

*BE05.30-B-1005-03B

Valve seat insert interference fit.

*BE05.30-B-1014-03B



*001589532100

5

If necessary, rework the valve housing in the cylinder head.

AR05.30-B-3831-02B

Basic bore (B) for the intake valve seat insert.

*BE05.30-B-1001-03B

Basic bore (B) for the exhaust valve seat insert.

*BE05.30-B-1002-03B

Depth (C) of the valve seat insert basic bore.

*BE05.30-B-1005-03B



*001589532100

6

Select a new valve seat insert (1/2) for installation

To obtain the recommended interference fit, the repair stage of the seat insert must correspond to the basic bore.

*BE05.30-B-1014-03B

Outside diameter (A) of the intake valve seat insert.

*BE05.30-B-1001-03B

Outside diameter (a) of the exhaust valve seat insert.

*BE05.30-B-1002-03B

Height (b) of the intake valve seat insert

*BE05.30-B-1003-03B

Height (b) of the exhaust valve seat insert

*BE05.30-B-1004-03B

Danger!

Risk of burns due to low temperature of the liquid nitrogen

7

Put the seat insert (1/2) in the cooling box with liquid nitrogen

Cool the seat inserts during 20 to 30 minutes.



*346589006300

8

Heat-up the cylinder head (3) in a water bath

Approximately 80 °C temperature.

9

With long nose pliers, lift the seat insert (1/2) from the cooling box and place it in the basic bore of the heated-up cylinder head

The basic bores for valve seat inserts in the cylinder head, are to be clean and dry.

10

Install the seat insert (1/2)

Proceed quickly to avoid the heating of the seat insert and the cooling of the cylinder head.



*403589001500



*403589011500

11

Machining the valve seat (1/2)

AR05.30-B-4511B

12

Installing valves

Utilize new valves, or 

AR05.30-B-3511B

rework the valve to be re-utilized.

AR05.30-B-4202A

Número

Denominação

Engine 475.9; 476.9

BE05.30-B-1001-03B

Diameter

(B) of the head case housing, intake

Normal

mm

60.00...60.03

Normal I

mm

60.20...60.23

Repair I

mm

60.40...60.43

(a) external of the intake valve case

Normal

mm

60.10...60.11

Normal I

mm

60.30...60.31

Repair I

mm

60.50...60.51

BE05.30-B-1002-03B

Diameter

(B) of the head case housing, exhaust

Normal

mm

53.00...53.03

Normal I

mm

53.20...53.23

Repair I

mm

53.40...53.43

(a) external of the exhaust valve case

Normal

mm

53.10...53.11

Normal I

mm

53.30...53.31

Repair I

mm

53.50...53.51

BE05.30-B-1003-03B

Height (b) of the intake valve case

Normal

mm

8.3...8.4

Normal I

mm

8.5...8.6

Repair I

mm

8.7...8.8

BE05.30-B-1004-03B

Height (b) of the exhaust valve case

Normal

mm

9.1...9.2

Normal I

mm

9.3...9.4

Repair I

mm

9.5...9.6

BE05.30-B-1005-03B

Depth (C) of the intake and exhaust cases housing

Normal

mm

12.5...12.6

Normal I

mm

12.7...12.8

Repair I

mm

12.9...13.0

BE05.30-B-1014-03B

Interference between the case (exhaust and intake ) and the housing in the head

mm

0.07...0.11

Número

Denominação

Engine 475.9; 476.9

BE05.30-B-1003-02C

Valve guide inside diameter - D (final finish)

mm

12,000...12,018

Wear limit (measured at valve guide middle).

mm

12,050