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      02-11-2012, 04:35 PM   #2130
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Drives: 2008 Z4 3.0si
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Originally Posted by 328xi0wner
Originally Posted by SELAX43 View Post
The first I heard of this, did BMW redesign the lifters and rollers? Please provide any technical details. Is there a bulletin? And if you had it done provide part numbers from the service record.
SI B 11 09 07
Engine January 2009
Technical Service

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This Service Information bulletin supersedes SI 11 09 07 dated April 2008.

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designates changes to this revision

Intermittent Hydraulic Valve Adjuster (HVA): "Ticking" or "Rattling" Noises


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All E82, E83, E85, E86, E88, E60, E61, E70, E90, E91, E92, and E93 with the N51, N52 or N52K engines

An occasional ticking or rattling noise from the HVA elements may occur during cold engine starts or frequent short-distance driving.

In these situations, the HVA elements may not yet have been supplied with sufficient amounts of air-free oil. This condition will not cause any damage to the engine, and usually remedies itself with a longer driving distance or operating times at full operating temperature.

In the event of a customer complaint, please perform the following the HVA bleeding procedure.

Important notes:

The bleed time may take anywhere from between two minutes and (in rare cases) to a maximum of 30 minutes. This procedure is to be performed on a level surface with the vehicle stationary, and in a properly ventilated area.

Procedure preconditions:

Engine oil level correct - neither underfilled nor overfilled

Engine running at operating temperature

Bring the engine up to an operating speed (no load) of 2000-3000 rpm and maintain this condition for three minutes (bleeding procedure).

Let the engine idle for 15-30 seconds and reevaluate whether the noise is still present or not.

Engine quiet - procedure is finished.

Engine noise is still present - repeat the procedure; perform steps #1 and #2 up to a maximum of 5 times.

Only if the noise remains after performing the bleeding procedure 5 times: proceed by performing the procedure for a final time, also at an engine operating speed of 2000-3000 rpm, but for a total time duration of 15 minutes.

BMW Technician

BMW Master Certifed level 1 Technican
This is the old one. The new service bulletin skips the bleeding process altogether and goes straight to swapping out the lifters.