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04-27-2010, 07:56 PM | #45 |
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Did you ever dyno your car to get the air/fuel ratio? Did you ever hear any pinging?
Like others said I think it might have been running a little lean, but these motors are not "proven" either...so you add the lean condition + track day heat + a little off balance then you get...failure
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04-27-2010, 09:52 PM | #46 |
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Good luck with the build, but I don't know how one could blame BMW if the reason for this is detonation and you had a tune on your car?
Don't et me wrong that they treated you piss poor, particularly about the DCT oil change, but what if they opened your engine and found what you found? They would tell you it's detonation and give you a huge bill. Though I don't know which way would be cheaper, have the local dealer do it, or ship your engine to Germany?
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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04-27-2010, 10:08 PM | #47 | |
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I am not here to beg BMW or attain any claim. I am only posting here because I feel to an extent that there are weak links in this engine that perhaps was accelerated by my tune no doubt. Even without it, I am confident it would have happened sooner or later. Also, at least by 1 forummer, it has been identified that some of the 2008 models have issues with the main bearings which was resolved in 2009 MY cars. Look here. Remember the ticking noises? http://www.m3post.com/forums/showthr...=main+bearings http://www.m3post.com/forums/showthr...ghlight=snowm3 To summise, knifegun posted the following : "My 2009 does not make the noise. I heard it was an issue with the main bearing on the 2008 models. The solution? Replace it which is very involved. This was resolved in 2009 with an updated design." Regarding writing to Germany, I think they cant do much because BMW Asia is the operative in my country. Also, from some people in the industry whom I have good contact with have told me certain things which I am not sure is the truth but it sounds logical. BMW Asia buys most of the cars, at least for the Singapore market, WITHOUT warranty from factory. Only those selected "bread and butter" cars are bought with warranty as they make up the most volume. They float this warranty across the board and BMW Asia takes over the warranty. Cut costs, maximise profits. Quite sucky especially when you paid USD250k for a normal M3! Thats maybe why BMW Germany cant do anything the way I see it. Also, when my problem came in last year around September, my dealer, has been stripped from selling anymore ///M cars. It went to a new dealer dedicated selling only M cars. Since they were still in the process of setting up, I had to bring my car back to the old dealer. I figured they didnt give a fuck cause they arent selling the M cars anyway and didnt want any burden to warrant or repair the car. Sounds logical innit from a corporate view?
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04-27-2010, 10:12 PM | #48 | |
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04-27-2010, 10:17 PM | #49 | |
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I had the car running really good for 6 months after that driving the light out of it and on the 3rd track day, it went bonkers. I agree the heat played a major part in the failure accelerated by the tune and perhaps some off balance. But it would have happened to me even in stock form, maybe itd just take a little longer.
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04-28-2010, 05:43 AM | #50 |
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How much is the total cost of rebuilding the engine?
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04-28-2010, 05:47 AM | #51 |
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About 20k USD.
- Steel Liners - Forged Pistons with Heat Treat Coating - Carillo H-Beam Connecting Rods - Ported Intake Valves - 5-Angle Valve Seating Arrangement - CT-1 Coated Bearings Here's a preview of the block.
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04-28-2010, 01:26 PM | #52 | |
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It's too bad you don't have support of the stroker engine in Singapore since I think it's cheaper than what you're paying.
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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04-28-2010, 04:57 PM | #53 |
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No signs of broken or bent valves? It sounds like you spun a bearing at the track event. Were you always running OEM spec oil? I'm concerned by what I see in those pics.
Edit, nvm I see there was valve damage. Definitely sounds like detonation. Last edited by FStop7; 04-28-2010 at 05:15 PM.. |
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04-28-2010, 07:20 PM | #55 |
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Not to sound negative or anything I hope that you will at least end up with the same crank hp after all said and done.
Will you need a custom tune?
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04-29-2010, 01:54 AM | #57 | |
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Wouldn't a new M3 engine cost about the same? Or is it more expensive?
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04-29-2010, 03:03 AM | #58 | |
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Here are more recent photos :
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04-29-2010, 06:36 AM | #59 | |
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Are you suggesting that there were other identified instances of main bearing issues documented elsewhere or is the sole source of that what knifeman "heard". I'm not saying it's not possible, I've just never seen anything remotely like that and would be interested in any other first hand knowledge. Or direct second hand for that matter, anything beyond a one-person rumor. Look forward to seeing the build progress.
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04-29-2010, 07:04 AM | #60 | |
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04-29-2010, 11:53 AM | #61 |
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Robert is right, hand porting this motor will most likely result in no gains or loss of power gains and disrupt the VE. The head is already ported pretty aggressively from the factory and the CNC marks also lead to a better control of the air flow since they are parallel with the flow.
Like many have said, detonation could be the cause, but if that was the case, where is the damage to the valves and head itself? I have seen engine damage from detonation first hand many times along with a poorly balanced motor from the factory. To me it looks like it was off balance. This must be considered because the shop rebuilding his motor even said the crank is off balance. Yes it's possible that the detonation through the balance of the crank off, but it would be to be very severe detonation for that to have happened, and nothing in the cylinder chamber or head show that. Your spark plug may have grown closer together because of the misfiring your motor is producing to begin with and distorted the tip. If those piston pieces would have flown around in your combustion chamber, your block would be near unrepairable right now.
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04-29-2010, 12:05 PM | #62 |
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If I were you I'd spend the extra money grand now and go 4.6 or build a low compression beast with a charger.
Trust me.
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04-29-2010, 12:11 PM | #63 |
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Its too late for me to do the 4.6 and also its very expensive itself just for the crank. The 4.6 consists of a 4.4 crank plus another 200cc from the bored out cylinders. My block is already prepared. And I am pretty happy with what I am seeing so far. This last series of M engines are NA and I want to retain the stock configuration so that it doest complicate things. I am not as lucky to be in a place where you have good support for these kinda modifications. So I am just playing safe. And I trust you because it took me an awfully long time to decide if I was going to supercharge this sucka. So yes the dark side of the force was VERY STRONG during that decision making time.
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04-29-2010, 12:22 PM | #64 | |
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Regarding the valves, a few of them were warped and had to be changed. The rest were vacuum tested and they were absolutely fine. The cylinder head took some slight damage but it did not warp the heads or anything like that. It was cleaned up and there was some marks but they were slightly grinded off. These marks were basically foreign objects from the pieces of the piston which was damaged. He remarked that the off balance of the crank by 1.3kgs was probably to do with the balancing at factory and at this margin of error, he was particularly surprised at such tolerance. The crank was not damaged at all from whatever happened in the cylinders but the bearings were in such a state that if I had not sent it in time, the block would be rendered unfixable once it eats through the bearings and it would be impossible to repair it. The piston pieces damaged and scurred my cylinder walls heavily but since it was going to be bored out anyway to fit the liners, then it wouldn't be a big deal. The thruster bearings had an unusually amount of uneven wear and tear which exacerbated the wear on the other bearings holding the crank. If you look at the photos carefully, you will know what I mean.
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04-29-2010, 12:27 PM | #65 | |
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Having said that, I did remember that after the 2nd track day, the engine was a little more rough than the first track day but didnt think much of it untill I heard the ticking noise which bothered me after the misfire. After even replacing the spark plugs, I had that ticking noise prior to tearing down the block. Cylinder 8 damage was the result from the misfire of the other cylinder in the same bank.
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04-29-2010, 12:32 PM | #66 | |
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It was reconfirmed once he sent the crank for balancing and at 1.3kgs off balance, it is definitely quite far off from what it should be. Speaking of which, could the wear and tear of the bearings could have caused it to slowly create a greater off balance? Because looking at the thruster bearings, the wear looks like it is edging off towards the end??
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