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      08-14-2011, 12:00 PM   #24
e34m5
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Drives: 135i
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The cold start issues are common to most german engines. The oil ports are very small and it takes a while before the oil heats up enough to flow readily.

BMW engines in particular have a noticeable "valve chattering" sound when cold.

None of what you describe sounds abnormal to me. I would only worry if these noises were still present after the engine reaches operating temp.

Also remember that for these engine operating temp is around 250*deg F, which takes quite a while to reach.