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12-19-2023, 11:54 PM | #1 |
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Questions regarding potential purchase with possible spun crank hub
I'm looking into a 2017 M3 with a possible spun crank hub. Car has 55k miles and is a pretty good price. Problem is- it's not local to me (about 4 hours away) so I can't just go look at it. Car was putting down about 540hp when it spun. Seller doesn't really seem to know a whole lot, so I'm curious if there's a way to confirm it's just the crank hub. Seller said the cylinder 1 timing is off by .8 but sounds healthy when running (but is rough when getting out of 1st and 2nd gear). Price is good enough that I could pay to replace the crank hub, but not an engine replacement.
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12-20-2023, 12:20 AM | #2 |
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If you can verify what he saying is true then go for it. How does he know how much the timing is off but yet doesn’t know much about what’s wrong with it? Also if they check the engine and found out that only the timing was off, which is a easy fix, why didn’t he just had it fixed why it was in the shop? It’s your choice to make, good luck.
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12-20-2023, 12:29 AM | #4 |
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They sent me a data log that shows the timing on cylinder 1 being off by .8. I tried to upload a picture but couldn't figure out how. The other cylinders are reading perfect.
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12-20-2023, 12:32 AM | #5 | |
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12-20-2023, 05:00 AM | #6 | |
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12-20-2023, 05:52 AM | #7 |
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Spidey sense is tingling, I'd stay away from that one.
Seller is not telling you everything they know and are trying to get out from under a blown engine with minimal financial damage. |
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12-20-2023, 10:56 AM | #8 |
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Thanks for the help everyone. I knew the answer before posting, but figured it was worth asking anyway. I'll keep an eye on it and see how low the price gets.
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12-20-2023, 11:26 AM | #9 |
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if you don't know how to rebuild the engine yourself....which you don't since you are asking on this forum....you better expect a complete engine rebuild or drop in plus labor factored into the price let alone a car that has been beat the fuck up
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12-20-2023, 03:24 PM | #10 |
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I don't believe for a second that the seller doesn't know much about the issue, whether they act like it or not.
If you can afford to replace the engine out of pocket, then maybe. If it doesn't need it, even better. But I would plan for the worst and base your decision off of that. |
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12-20-2023, 05:29 PM | #12 | |
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12-21-2023, 07:51 AM | #13 |
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As others have said, prepare for a rebuild and go through with it if the price is right. You could be lucky with just a retiming and crankhub replacement or it can cost 3 times more for a rebuild.
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12-21-2023, 10:24 AM | #14 | ||||
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I knew this was the correct answer from the beginning, but wanted to get feedback anyway. Quote:
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Thanks for the help everyone! What I was hoping is someone would read this and say something like "that doesn't sound like a spun crank hub" that sounds like "(insert much less severe issue that is easily fixable)" here. I'm looking in the X3 M40i territory, but figured if I could pick up an M3 at a good price why the hell not. |
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12-21-2023, 11:05 AM | #15 | |
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