Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2004320I (E46) (CANADA) L6-2.2L M54REPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINECYLINDER HEAD ASSEMBLYVALVE SEATSERVICE AND REPAIR
2004 BMW 320i (E46) (CANADA) L6-2.2L M54
Valve Seat: Service and Repair
2004 BMW 320i (E46) (CANADA) L6-2.2L M54SECTION Service and Repair
Reconditioning A Valve Seat
(Cylinder Head Dismantled)
Machine valve seat surface with special tool 00 3 520 or with special tool 00 3 580 in accordance with manufacturer's instructions.
Note: After machining the outer and inner diameters of the valve seat face with a correction milling tool, rework to the specified diameter until the correct valve seat width (5) is obtained.
1. Valve-seat angle
2. Correction angle, outside
3. Correction angle, inside
4. Outside diameter seat face
5. Valve-seat width
Specified values (1 to 5), refer to Specifications, Mechanical.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.