Check, remove/install valve guides

AR05.30-G-3731MT

Check, remove/install valve guides

10.1.07

6.11.06

Inside Ø (B)

Engine 447.903

*BE05.30-N-1001-02O



Removing

1

Remove valves

AR05.30-G-3511MT



Checking

2

Check valve guides (1) for surface damage

 The valve guides (1) must not have any surface damage.

If a valve guide (1) is not according to requirements mark or note the respective valve guide (1).

3

Check valve guides (1) inside Ø (B) using a plug gage.

 It must not be possible to insert the side of the plug gauge marked with '+' into the valve guide (1).

If valve guide (1) is not according to requirements mark or note the respective valve guide (1).

*BE05.30-N-1001-02O



*100589102100

4

Determine the damaged valve guides (1) based on markings or notes

 Install valves if no damaged valve guides (1) were discovered: 

Install valves

AR05.30-G-3511MT

 Discovered damaged valve guides (1) must be replaced: 

Perform steps 5 to 11.



Removing

5

Remove valve guide (1) on cylinder head (2) from combustion side



*403589001500



Measure

6

Measure bore Ø (A1) for valve guide in cylinder head (2)

 The bore in cylinder head (2) must be reamed to the next deviation for the bore Ø (A1) if the dimension deviates from the value shown in the table. The cylinder head (2) must be replaced if the maximum deviation is exceeded.

*BE05.30-N-1001-02O

 Use quick caliper for internal measurements.



*000589175300

7

Messier outside Ø (A) of new valve guide (1) and compare with current value for bore Ø (A1)

 The identical deviation stages bore Ø (A1) and outside Ø (A) given in the table must be compared with each other otherwise the cylinder head (2) or valve guide (1) can be damaged.

*BE05.30-N-1001-02O

 The new valve guide (1) must be selected to fit to the current bore Ø (A1) in the cylinder head (2).



Install

 Danger!

Risk of injury caused by handling liquid nitrogen or by touching undercooled objects. Risk of suffocation from inhaling nitrogen gas.

Wear heat protective gloves, protective clothing and full eye protection.
Ensure that the work area is adequately ventilated.

AS00.00-Z-0003-01A

8

Insert valve guide (1) in supercooling box



 Fill supercooling box with liquid nitrogen.

 Supercool valve guide (1) for about 20 to 30 minutes.

 Avoid contact with the liquid nitrogen or with the supercooled valve seat ring (1).



*346589006300

9

Press in new valve guide (1) using a drift and spacer sleeve

 from the combustion side outwards.

Observe distance (D) of valve guide (1) upper edge to valve spring contact surface.

*BE05.30-N-1001-02O



*403589001500

10

Check inside Ø (B) of pressed in valve guide (1) using the drift; machine with reamer if necessary

 Only turn reamer clockwise.

*BE05.30-N-1001-02O



*100589102100



*000589125300

11

Install valves

AR05.30-G-3511MT

Number

Designation

Engine
444.901,
447.903

BE05.30-N-1001-02O

Valve guide

Outer Ø (A)

Standard

mm

18.028 to 18.046

Deviation 0.2

mm

18.235 to 18.256

Deviation 0.4

mm

18.435 to 18.456

Bore Ø in cylinder head (A1)

Standard

mm

18.000 to 18.018

Deviation 0.2

mm

18.200 to 18.221

Deviation 0.4

mm

18.400 to 18.421

Inside Ø (B)

Pressed in

mm

12.000 to 12.027

Length (C)

mm

67,0

Distance (D) top edge

Inlet

mm

17.1 to 17.5

Valve guide to contact surface of valve spring

Outlet

mm

17.1 to 17.5

See picture

AR05.30-G-3731MT