Valve Timing - BMW N55 Manual

Valve Timing

N55 valve timing diagram
Intake valve Ø
Exhaust valve Ø
Maximum valve lift, intake
valve/exhaust valve
Intake camshaft spread (VANOS
adjustment range)
Exhaust camshaft spread (VANOS
adjustment range)
Intake camshaft opening angle
(max.-min. spread)
Exhaust camshaft opening angle
(max.-min. spread)
Opening period intake camshaft
Opening period exhaust camshaft
Note: The N55 has a larger intake and exhaust VANOS adjustment range
as well as larger intake valve lift, and cam duration than the N54 engine.
42
N55 Engine
N54B30O0
[mm]
[mm]
[mm]
[°crankshaft]
[°crankshaft]
[°crankshaft] 125 - 70
[°crankshaft] 130 - 85
[°crankshaft]
[°crankshaft]
31.4
28
9.7/9.7
55
45
245
261
N55B30M0
32
28
9.9/9.7
70
55
120 - 50
115 - 60
255
261