Replace valve seat rings

AR05.30-T-3831A

11.11.11

ENGINES 447, 489

T01.30-0007-06

1 Inlet valve seat ring

2 Exhaust valve seat ring

3 Cylinder head

4  Drift with spacer sleeve

a Outer diameter of valve seat ring

b Height of valve seat ring

B Bore diameter of valve seat rings in cylinder head

C Bore depth of valve seat rings in cylinder head

 	Remove/install
1	Remove valves		AR05.30-T-3511A
2	Check valve guides for wear	- Visual inspection: The valve guides must not have any surface damage. - Use plug gauge to check inner diameter of valve guide.  It must not be possible to insert the side of the plug gauge marked with '+' into the valve guide.
		Valve guide inside diameter	*BE05.30-N-1001-02F
		Install new valve guides, if necessary.	AR05.30-T-3731A
			*100589102100
3	Remove valve seat rings (1, 2) from the cylinder head (3)		AR05.30-T-3831-01A
		Valve seat turning device
			*000589303300
			*000589293300
			*000589343300
4	Measure valve seat ring bore diameter (B) in cylinder head (3)	 To do this, insert dial gauge into quick caliper for internal measurements and set to the necessary diameter with the micrometer.
		Bore diameter of intake and exhaust valve seat rings	*BE05.30-N-1005-03F
			*001589532100
		Quick calipers for internal measurements
		Quick calipers for internal measurements
		Outside micrometer
		 The overlap between the bore diameters in the cylinder head and the outer diameters of the new valve seat rings for intake and exhaust valves must be assured. If the dimensions differ from the specified data 
		Machine bores in cylinder head to the next Deviation of the outside diameter of the new valve seat rings.
		Bore depth for valve seat rings in cylinder head "C"	*BE05.30-N-1006-03F
		Inlet valve seat rings outer diameter	*BE05.30-N-1001-03F
		Exhaust valve seat rings outside diameter	*BE05.30-N-1002-03F
		Overlap of valve seat rings in cylinder head	*BE05.30-N-1003-03F
5	Place valve seat rings (1, 2) in supercooling box and pour in liquid nitrogen.	- Supercool the valve seat rings for about 20 to 30 minutes. - Avoid contact with the liquid nitrogen or with the supercooled valve seat ring.
			*346589006300
6	Heat cylinder head (3) to approx. 80 °C	 In water bath
7	Use pliers to remove valve seat rings (1, 2) from supercooling box and fit onto the bores of the heated cylinder head (3)
8	Press in valve seat rings (1, 2)	 Fit specified assembly sleeve onto valve seat ring and insert drift into assembly sleeve. Drive in valve seat ring using plastic mallet. The valve seat rings must be pressed in without any delay.
			*403589001500
			*403589011500
		Distance between cylinder head separating surface and end face of valve seat ring	*BE05.30-N-1004-03F
9	Machine valve seat rings	 New valve seat rings must always be machined.
10	Grind valves	 When installing new valve seat rings, the valves must always be ground.	AR05.30-T-4202-01A
11	Install valves		AR05.30-T-3511A

Check values for valve seat rings

Number	Designation				Engine 447	Engine 489


BE05.30-N-1001-03F	Intake valve seat ring	Outside  "a"	Default	mm	60.10-60.11	60.10-60.11
			Deviation 0.2	mm	60.30-60.31	60.30-60.31
			Deviation 0.4	mm	60.50-60.51	60.50-60.51
		Height "b"	Default	mm	8.8-8.1	8.8-8.1
			Deviation 0.2	mm	9.0-9.1	9.0-9.1
			Deviation 0.4	mm	9.2-9.3	9.2-9.3
			See picture		AR05.30-T-3831A	AR05.30-T-3831A
BE05.30-N-1002-03F	Exhaust valve seat ring	Outside  "a"	Default	mm	53.10-53.11	53.10-53.11
			Deviation 0.2	mm	53.30-53.31	53.30-53.31
			Deviation 0.4	mm	53.50-53.51	53.50-53.51
		Height "b"	Default	mm	9.6-9.7	9.6-9.7
			Deviation 0.2	mm	9.8-9.9	9.8-9.9
			Deviation 0.4	mm	10.0-10.1	10.0-10.1
			See picture		AR05.30-T-3831A	AR05.30-T-3831A
BE05.30-N-1003-03F	Overlap of valve seat ring in cylinder head		Intake	mm	0.07-0.11	0.07-0.11
			Exhaust	mm	0.07-0.11	0.07-0.11
BE05.30-N-1004-03F	Distance between cylinder head separating surface and end face of valve seat ring		Intake	mm	3.6-3.8	3.6-3.8
			Exhaust	mm	2.8-3.0	2.8-3.0
BE05.30-N-1005-03F	Bore 	Intake valve seat rings	Default	mm	60.00-60.03	60.00-60.03
		in cylinder head "B"	Deviation 0.2	mm	60.20-60.23	60.20-60.23
			Deviation 0.4	mm	60.40-60.43	60.40-60.43
		Exhaust valve seat rings	Default	mm	53.00-53.03	53.00-53.03
		in cylinder head "B"	Deviation 0.2	mm	53.20-53.23	53.20-53.23
			Deviation 0.4	mm	53.40-53.43	53.40-53.43
			See picture		AR05.30-T-3831A	AR05.30-T-3831A
BE05.30-N-1006-03F	Bore depth for valve seat rings in cylinder head "C"		Default	mm	12.5-12.6	12.5-12.6
			Deviation 0.2	mm	12.7-12.8	12.7-12.8
			Deviation 0.4	mm	12.9-13.0	12.9-13.0
			See picture		AR05.30-T-3831A	AR05.30-T-3831A

Test and adjustment values for valve guides

Number	Designation				Engine 447	Engine 489


BE05.30-N-1001-02F	Valve guide	Outside  (A)	Default	mm	18.028 to 18.046	18.028 to 18.046
			Deviation 0.2	mm	18.235 to 18.256	18.235 to 18.256
			Deviation 0.5	mm	18.535 to 18.556	18.535 to 18.556
		Bore dia. in	Default	mm	18.000 to 18.018	18.000 to 18.018
		Cylinder head (A)	Deviation 0.2	mm	18.200 to 18.221	18.200 to 18.221
			Deviation 0.4	mm	18.400 to 18.421	18.400 to 18.421
		Inside  (B)	pressed in	mm	12.000 to 12.027	12.000 to 12.027
		Length (C)		mm	67.0	67.0
		Distance (D) top edge	Intake	mm	17.1 to 17.5	17.1 to 17.5
		of valve guide to contact surface of valve spring	Exhaust	mm	17.1 to 17.5	17.1 to 17.5
		See picture			AR05.30-T-3731-07A	AR05.30-T-3731-07A