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06-08-2020, 04:30 PM | #23 |
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06-08-2020, 04:39 PM | #24 |
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..... these are the kinda threads I think about whenever my finger is on the start button and I just want to drive it for 5 miles !
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06-08-2020, 09:56 PM | #25 |
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Unfortunately, this happened to me about 2 weeks ago. No pistons through the block, no plume of smoke, no metal bits out the exhaust, no drama, but engine completely seized. I wasn't doing donuts or burnouts, just driving and the car stalled out and wouldn't turn over again. Spun bearing, engine toast.
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06-10-2020, 08:32 PM | #26 | |
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06-10-2020, 09:21 PM | #27 | ||
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06-10-2020, 09:31 PM | #28 |
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06-10-2020, 11:42 PM | #29 | |||
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Any other risk factors - forced air, tune with higher rev limit, driven hard before warmed up .... seems way early at 36k |
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06-11-2020, 06:37 AM | #30 |
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The rod bearing failures have happened at as little as 6k miles. It really is a lottery.
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06-11-2020, 08:32 AM | #31 | ||||
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Edit: stock redline. |
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06-11-2020, 08:59 AM | #32 | |||||
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06-11-2020, 09:46 AM | #33 |
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I don’t think it has for anyone else out if warranty. Plus you would still spend far more at a bmw dealer even with a partial discount than you would at a good independent shop.
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06-11-2020, 09:50 AM | #34 |
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My entire repair is being covered by a third party warranty. When it's all done I will make a post about it because I'm amazed at how good their service is.
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06-14-2020, 10:07 AM | #35 |
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Main bearing seized
When I read this, I still feel the pain and anger I felt when the motor seized on my First M3 (01/10). The rod bearings had been done (OEM tin/alu) just 8000km before.
I had warmed up the car (~200F oil) and did a couple of burnouts. Suddenly DCT shift into N and engine shut off. No crank, and manual crank was almost impossible. It turned out the main bearing seized. Repairing this is cost ineffective when compared to price of a good used motor, and no guarantee with line boring the main bearing housings. |
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06-14-2020, 11:39 AM | #36 | |
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As for the German S65 lottery... I totally agree !
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10-11-2020, 10:06 PM | #37 |
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Exact same story. Engine is out, haven't had a chance to take a look yet. Was it rod bearings? How bad? My oil is good, and from what I can see so far no signs of heat. Top end is perfect. Everything so far looks like a new car but it's seized up for certain.
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10-11-2020, 10:36 PM | #38 |
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Wasn't rod bearings. Main bearing seized to crank. I replaced the engine with another good used one and changed the rod bearings before I installed it. Old engine is collecting dust at the shop. Based on what I've read, the block is not really usable if there is main bearing failure so I don't think I can rebuild it.
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10-12-2020, 02:06 AM | #39 |
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As a new owner of 2 weeks, this thread fills me with dread.
So not only do I have to consider RB’s but even if I change these, the main bearing can go also?!
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10-12-2020, 02:52 AM | #40 |
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10-12-2020, 05:51 AM | #41 |
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Very rare compared to rod bearing failure. And too expensive to change preventatively if you have to pay labor. Not worth worrying about.
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10-12-2020, 07:59 AM | #42 | |
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Meanwhile, Vettes for example have had dry sumps for many years. In the C8 development interviews the Jueutcher guy (hard name I can't spell) said they had improved their dry sump system since the C7 gen and this time they had lost many fewer engines. He quoted their lateral G handling for the C8 gen at 1.25g. Really makes me wonder what the C7 had. 'Dry sump' is yet another word in the long list of words that mean very little. Right along 'purpose built sports car'. It checks a box but provides very little actual information. |
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10-12-2020, 08:01 AM | #43 | ||
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Main bearing failure is a tiny, tiny percentage of the rod bearing failure. It's the difference between not jaywalking all the time vs being worried a meteorite is going to hit you. |
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10-13-2020, 10:03 AM | #44 | |
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