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08-10-2008, 10:14 PM | #45 |
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I've heard numerous times that you're better off pushing the engine right away than following the dealer recommendation (similar to the process explained in the link provided previously in this thread).
As for recourse in a warranty claim, I bet BMW can download RPM and speed numbers from the ECU so it doesn't seem impossible that they could cite non-conformity during break in as a warranty voiding action. I doubt that would hold up if litigated. Alternatively, if you can prove your engine operates below BMW's Hp claims and your pistons show leakage you might be able to argue that the break in instructions damaged the engine. I'll be faced with this decision soon and frankly, I don't know which approach I am going to take! |
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08-10-2008, 10:17 PM | #46 | |
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08-10-2008, 10:37 PM | #47 | |
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Overrevving is done when you exceed the redline, hence why they give you a limiter. If going over 5500 during break in voided the warranty they would give you a limiter for it. There is nothing that says going over 5500 rpm voids warranty, you are pulling this out of thin air. |
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08-10-2008, 10:59 PM | #48 |
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It's easy to redline the DCT by accident when you first get it. Never mind!!! it's ALWAYS easy to over-rev the DCT b/c of mistaking wether or not you are in D mode or not. It's a REAL big problem for me. I hit gas and then look down and see that i am at 7K rpm in first gear. Happens at least once a week.
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08-10-2008, 11:23 PM | #49 | |
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08-11-2008, 12:48 AM | #50 | |
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If something as simple as waiting for 1200 miles before driving the car hard and making sure that during that first 1200 miles you also vary engine speeds and driving styles to be sure to break-in the entire drive train then this car is not for you. Move on and buy an S5, 335, G37 or the dozen of other fast cars out there that you will enjoy very much. This goes along the lines of people moaning and bitching about the smallest things on these cars, like why isn't the ride softer or why do I have to adjust the settings to get the kind of off the line response that I expect should be there---- bottom line its a sports car, maybe not a GT3 or 430, but a sports car none the less that happens to have a back seat. It is unbelievably versatile and much more civil than most of the cars that equal or better its performance. That being said, it can't be a civic, 750 and camry all wrapped into one car, nor should you want it to be. For those that feel break-in is BS, why on earth would BMW put in in the manual and go into great detail on it but not in their non-//M cars? If you didn't break your car in properly and it was fine that was simply luck, not the norm. Cheers, e46e92
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08-11-2008, 01:01 AM | #51 | |
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Don't think BMW does not test these motors before they go into your car. They test the motors hard so that if anything major is to break it happens before you get it. The break in is not just for the motor but brakes, suspension, diff, and even the hand brake. If you really think 5600 vs. 5500 is going to ruin the motor you are crazy and don't have an idea of how these motors are put together in the first place. Now, the rings have to seat and sitting at redline is not what anyone is talking about. But motors that break in with varied rpms and driven a bit harder do tend to dyno higher. |
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08-11-2008, 01:03 AM | #52 |
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What do you mean you can back it up but you don't want to? Seriously, show the board and everyone else how BMW voids the warranty if you accidentally cross 5500 rpm. I bet the majority of people on the board have, without even trying to, exceeded the recommended limit for short intervals. When test driving the car my salesman himself wanted to show me what the car was capable of and exceeded 5500 rpm substantially (not in the one I bought).
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08-11-2008, 01:11 AM | #53 | |
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08-11-2008, 01:15 AM | #54 | |
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If you disagree with me or don't want to take advice without "hard proof", then don't take it. Chances are it won't matter. But maybe it will. Your call. I don't care either way. Just trying to help. |
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08-11-2008, 02:21 AM | #55 |
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You are oversimplifying, which is drivel in itself. Not sure where I wrote the break in is BS, what I wrote is that varying the RPM's through the powerband is important.
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08-11-2008, 02:21 AM | #56 | |
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08-11-2008, 07:23 AM | #57 | |
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08-11-2008, 07:39 AM | #58 | |
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I have kept track of most of my used vehicles and most of them have gone over 160000 kms with no engine reliability issues.I had an engine out of my E30 325 Firehawk racer that was broken in at the track during the 1st practice session and ran over 18000 kms of race use.I then sold that engine to a friend of mine who used it on the street for over 200000 kms till the rest of the car died.I had had a 97 Ford Explorer that I towed a 6000lb racecar trailer with with less than 100 kms on and that truck went over 500000kms with zero engine issues. The only time I followed an easy breakin the engine had to be replaced as it had oil consumption issues. |
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08-11-2008, 11:08 AM | #59 |
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read the owners manual. do what it says. why would you do otherwise?
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08-11-2008, 11:22 AM | #60 |
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Does anyone really think there is a secret handshake break-in procedure that only a handful of folks know about?
Just follow the BMW recommended procedure (within reason) and your car will run within the 2 sigma curve of all the others. Go outside of the recommendations, and you may or may not make more power and burn less oil. It's up to you. Do I think a break-in per the above motorcycle guy recommendation will hurt the engine? No.
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08-11-2008, 11:28 AM | #61 | |
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08-11-2008, 01:39 PM | #62 |
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If i LEASED, I would not care about breaking it in. Agreed? Let the next guys deal with the long term sequela of my abuse. That's why we buy NEW with these kind of cars.
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08-11-2008, 04:36 PM | #64 | |
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I'm not an Automotive engineer but am an Aircraft propultion technition and engineer and manufactures have different methods of break-in for their engines according to the engineer's design spec's. Be it a V8 or a aircraft jet engine. Run-in is important to "seat" piston rings, turbine fan blades, compressor rub-strips, temperature flux, etc. So why think that someone knows because they know some guy that has some car or works on some other engine? If the engine rings are run-in the first 10, 20, 30, km or what ever they built it for and the rest of the break-in is for the drive-train. Then after the initial break-in the engine is good to go, woul it not be? My '04 Saab 93 Aero took 3K to break-in per the manual and to be exact, the engine did not feel smooth running and effertless to red-line until about 5K miles. My M3 is at 3200 and the engine, to me at least, still feels a bit tight when reving high revs, I can't explain "tight" but I think some of you fella's understand. I would not go against what BMW engineers suggest in the manual unless you don't give a rat's ass about the car or engine IMHO. |
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08-12-2008, 02:33 AM | #65 |
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for the most part
im on the fence; bmw did make the car and they do know the best. Or do they? some of these educated mechanics have their own say. i dunno whos right and whos not but im just gonna trust bmw because if ur engine breaks when ur doing their procedure, theyll fix it but if u follow billy joe's secret break in and u break ur engine, he's not gonna fix it for u.
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08-12-2008, 11:03 AM | #66 | |
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Not like your going to go enter this car into the 24 hrs of Le Mans, or 24hr of Nurburgring anyways.
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