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#1 (permalink) Old 02-20-2005, 02:53 PM
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my son down shifted his 330i last night on the highway from 3rd to 2nd by accident so he said at 70 mph, lights came on and the motor stoped and he coasted to the side of the highway; after we had it towed and closer examanation, the engine turns over but will not start , 2002 330i 48000 miles 5 speed manual trans.
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#2 (permalink) Old 02-20-2005, 03:53 PM
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timing chain. do you hear the engine "whine" when you crank it like a vacuume cleaner or something?

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#3 (permalink) Old 02-20-2005, 04:12 PM
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Overreving is the worst thing you can do to an engine. Unfortunately this usually blows the engine. The valves hit the pistons and you have a catastrophic engine failure. I hope that this didnt happen to you but sadly it sounds as though it has. Good luck.

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#4 (permalink) Old 02-20-2005, 04:24 PM
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Quote:
Originally posted by 3serbmdubya@Feb 20 2005, 02:53 PM
timing chain. do you hear the engine "whine" when you crank it like a vacuume cleaner or something?
[snapback]295466[/snapback]
it whines while i try to crank it like it is trying to engage the flywheel or something all belts seem to be intact there appears to be no crack or damage by looking at the motor; Would the engine have some overriding alarm or protection system to prevent damage?
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#5 (permalink) Old 02-20-2005, 07:10 PM
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There is no protection system. If the engine was overreved then I suggest performing a compression test if the damage is not visible. If the compression test doesnt show any problems then continue normal troubleshooting.

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#6 (permalink) Old 02-20-2005, 10:30 PM
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Quote:
Originally posted by Dirty_Tool@Feb 20 2005, 07:10 PM
There is no protection system. If the engine was overreved then I suggest performing a compression test if the damage is not visible. If the compression test doesnt show any problems then continue normal troubleshooting.

DT
[snapback]295609[/snapback]

What about the rev-limiter? I know it will protect the engine while the car is in the same gear. But since "tidesrise's son" misshifted from 3rd to 2nd at 7k-8K his rev limiter will do nothing for him? If this is correct can we clarify the following issues?
A. The 50K warranty will not cover it.
B. Your DME upon further analysis will show the revs/its duration in seconds/highest speed reached and all relevant information.
C. The data compiled from B above will be used against you to determine who is at fault to shoulder the repair bills/cost.

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#7 (permalink) Old 02-21-2005, 01:40 AM
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The rev limiter is electronic. It cannot overide a mechanical over rev. nothing can. Yes warranty will be voided. It can easily be proved that the engine was over revved.

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#8 (permalink) Old 03-03-2005, 01:56 AM
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yea he definatley over-revved and messed up his engine pretty bad. you will probably need a new one.

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#9 (permalink) Old 03-03-2005, 02:10 AM
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Wow. I've seen 5th to 2nd....but not 3rd to 2nd at 70. Yeah, thats not good. I'm betting....you're going to need a new engine.

Hope I'm wrong. Best of luck to you.
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#10 (permalink) Old 03-06-2005, 12:10 AM
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Quote:
Originally posted by BMWLotAttendant@Mar 3 2005, 01:10 AM
Wow. I've seen 5th to 2nd....but not 3rd to 2nd at 70. Yeah, thats not good. I'm betting....you're going to need a new engine.

Hope I'm wrong. Best of luck to you.
[snapback]303037[/snapback]
Wow!!! How old is he? Second is one of those gears that you have break your own eranomic form for (not to mention the slight guide from the tranny). Are you sure it wasnt from fourth to third at a high rate of speed (looking for fifth)? This is very very common, and I'm sure the DME will tell all. so you might want to have a talk before taking it in.
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