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Re: Red-linging the RPM



Robert,

If you hit redline by accelerating up to that point, the engine's rev 
limiter will engage to protect the engine.  No damage will occur, and since 
an over-rev condition didn't take place, nothing would be recorded by the 
DME.

If, on the other hand, you incorrectly downshifted (fifth to second instead 
of fifth to fourth, for example), the engine would over-rev, and the DME 
would record the fault.  It's also time stamped by the DME (I think it's 
stamped with the hour of operation that the fault occurred).

And yes, if your engine had a later failure that could be attributed to an 
over-rev, your warranty would be void.

Of course, if you were able to clear the fault, the dealer would never know 
about it... ;-)

- -rb

>
>Date: Tue, 10 Jul 2001 11:58:09 +0200
>From: "Robert Macpherson" <Robert.Macpherson@domain.elided>
>Subject: Red-linging the RPM
>
>Hi everyone,
>
>Here's a question that came to mind the other day when I (for a maximum 1-2 
>seconds) exceeded the RPM redline to avoid having a Audi A6 marrying its 
>grill to the rear end of my 318i at (his) excessive speed:  if a similar 
>accident-avoidance incident were undertaken in a BMW under warranty, and it 
>was duly noted on the on-board computer, would the said warranty be voided? 
>Or is rightly presumed that a remote red-lining incident is distinct from 
>general wreckless driving, and the warranty stays intact?
>
>Robert MacPherson, Brussels
>'95 BMW 318i (no longer under warranty)

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