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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Dealership Denying Warranty for blown motor



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      11-30-2009, 07:24 PM   #1
eurodriver
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Dealership Denying Warranty for blown motor

I have a 08 335i coupe. I was driving about 70miles per hour on the freeway on 5th gear. The car started to jerk and the gas cut off. I pulled over on the emergency lane and the tow truck towed it to a local dealer. The dealer had a technician from BMW North America do a diagnostic on it. They stated that the car was pushed to 8800 RPM's and it was due to customer mis use (or something) and that its not covered thru warranty. The engine is blown and the only thing i can do is Buy a new engine for $19,000. I do not race this car and i have never hit 8800 RPM's. My car has rims on it so I am very careful with it and haven't even hit 100MPH ever since i put the rims on last year. What should i do? Has anyone dealt with something like this before?
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      11-30-2009, 07:29 PM   #2
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did u buy it new?
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      11-30-2009, 07:32 PM   #3
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I am leasing it; and yes it was new when i got it
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      11-30-2009, 07:35 PM   #4
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Ask the dealer to show you evidence of the computer read out, sounds fishy that the computer would lie....
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      11-30-2009, 07:36 PM   #5
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are they fucki** serious ? i would blow my lid in there !
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      11-30-2009, 07:40 PM   #6
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I saw a used N54 engine with only a few thousand miles for sale for like $4500.
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      11-30-2009, 07:41 PM   #7
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The factory Rev Limit is no where near that high I think its at 6800 or 7000rpm. As some idiot has shown on here a few days ago as he was bouncing off the rev limiter thats all the car would do even IF you did over rev it. Tell them to show you their proof and make sure you get BMWNA involved because sounds like the dealer is trying to screw you.
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      11-30-2009, 07:41 PM   #8
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Something's fishy here.
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      11-30-2009, 07:44 PM   #9
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Umm...even on a 6spd and you bang it in the wrong gear, rev limiter kicks in at what, 7200ish?? It just bangs off it till the car slows down. 8800rpm is a computer screw up and BMW should be fixing that and the engine
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      11-30-2009, 07:45 PM   #10
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damn good luck... give em hell tomorrow!
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      11-30-2009, 07:46 PM   #11
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the only way you can go above the limiter is by downshifting into a low gear at high speed. I would ask for prove and supporting documents. Also, $19,000 sounds high.
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      11-30-2009, 07:55 PM   #12
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Fuck that shit... threaten arbitration, then legal means to resolve this.
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      11-30-2009, 08:00 PM   #13
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Quote:
Originally Posted by jpsum View Post
the only way you can go above the limiter is by downshifting into a low gear at high speed. I would ask for prove and supporting documents. Also, $19,000 sounds high.
But even then, doesnt it just ramp up your RPM's to the limiter really quick and just bang off it still? Never done it so I dont know, I just figured the limiter was the limiter, period.
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      11-30-2009, 08:02 PM   #14
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NO, that is a money shift that would fry the engine in seconds.. The limiter cannot help you in this situation.. But trust you would know if you had done that
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      11-30-2009, 08:06 PM   #15
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A 6th gear to 2nd gear downshift at high speeds may do it but you would know if you did.
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      11-30-2009, 08:12 PM   #16
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I don't buy the OP's account. I want more information. Fishy.
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      11-30-2009, 08:12 PM   #17
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Well at least I guess I learned something new today. Not that I plan on trying it either, haha.
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      11-30-2009, 08:13 PM   #18
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Quote:
Originally Posted by Dackz View Post
But even then, doesnt it just ramp up your RPM's to the limiter really quick and just bang off it still? Never done it so I dont know, I just figured the limiter was the limiter, period.
No, once it becomes physically connected to the final drive which is spinning at a high rate, there's no way the engine can slow it down, and it will grenade.
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      11-30-2009, 08:14 PM   #19
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Something's not right here. You can blow the engine with a 6MT if you put it in 1st at 80 or something, the limiter isn't going to help you there.

Have you ever even bounced off the limiter before? If you honestly haven't (and nobody else drives your car), you need to be aggressive with this. Call BMWNA and get them involved immediately. Paying any sort of money on a leased car because of this is insane, again, providing you honestly and truly didn't do anything stupid. I would also ask them for the printout, and get written evidence of what exactly is broken.

Good luck.
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      11-30-2009, 08:36 PM   #20
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although this is probably not related to the OP's issue here, but...

The rev limiter limits the engine rev speed by cutting off the fuel supply when it reaches a certain rpm. When you down shift into a wrong gear, the wheels are driving the engine, so the limiter isn't going to do anything. It's meant to prevent you from reving the engine too high with the gas pedal.
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      11-30-2009, 08:39 PM   #21
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It hasn't been asked yet: Did you have any engine mods on the car? Anything at all that is not stock? (Besides Wheels) Even if you were heavily modded, they dug themselves into a trap saying you 'hit 8800rpm'


Was there a big "Boom" you'd hear it if your motor grenaded

To confirm: You have a manual transmission?
out of curiosity, why were you in 5th gear crusing the highway?
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      11-30-2009, 08:43 PM   #22
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Quote:
Originally Posted by jpsum View Post
although this is probably not related to the OP's issue here, but...

The rev limiter limits the engine rev speed by cutting off the fuel supply when it reaches a certain rpm. When you down shift into a wrong gear, the wheels are driving the engine, so the limiter isn't going to do anything. It's meant to prevent you from reving the engine too high with the gas pedal.
hmmm, many vehicles (all vehicles/toys I know) have an electronic rev limiter that cuts spark not fuel
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