bmw Workshop Repair Guides

BMW Workshop Service and Repair Manuals

6 RA Checking A Valve Guide For Wear - Valve Removed (S50 _ S54) > < 4 RA Disassembling And Assembling Cylinder Head - Cylinder Head Removed (S54)|Page 532
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11 12 527

Remachining a valve seat - cylinder head
disassembled (S50 / S54)

Machine valve seat surface with special tool 00 3 520 or with
00 3 580 in accordance with tool manufacturer's instructions.

Note:

After machining valve-seat surface: Remachine outside and inside
diameters with correction milling tool to the specified diameters
until you obtain valve seat width (5).

1. 

Valve-seat angle

2. 

Correction angle, outside

3. 

Correction angle, inside

4. 

Outside diameter of seat face

5. 

Valve-seat width

Items (1) to (5).

RA  Remachining a valve seat - cylinder head disassembled (S50 / S54)

BMW AG - TIS

16.02.2013  08:22

Issue status (12/2007) Valid only until next DVD is issued

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6 RA Checking A Valve Guide For Wear - Valve Removed (S50 _ S54) > < 4 RA Disassembling And Assembling Cylinder Head - Cylinder Head Removed (S54)|Page 532