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M-Series (M1, M3, M5, M6) General M-Series Discussion - If it does not fit into a more specific M Category above, please place it in here. In addition, previously archived M-Series discussion is located in this section.

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Old 06-09-2005, 05:04 PM   #1 (permalink)
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My friends supercharged 99 m3 he bought the other day just grenaded in a bad way. The seller tried to hide some serious flaws that the supercharger had, and the supercharger exploded and pieces of the supercharger got sucked into the various ports and areas of the motor and basically killed the entire motor.

Took the motor apart, piston walls are terribly scarred, pistons are damaged and rings broken, havent checked rods yet but wouldnt be suprised if they are bent.

Needless to say, buying modified vehicles is risky, but ALWAYS HAVE THEM CHECKED BY A COMPETENT MECHANIC.

He didn't know I worked on BMW's when he bought it, and didn't know that running alcohol injection THROUGH a supercharger is a bad bad idea.

Thats why the supercharger grenaded. At 100,000 RPM and extreme pressures, the alcohol becomes a solid un-compressible mass which makes the supercharger overwork itself and eventually fail in a very bad way.

Its down, but not out.

Anyone have a used s52/m52?
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Old 06-09-2005, 06:28 PM   #2 (permalink)
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No used parts...but what a story! Some great advice.
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Old 06-09-2005, 06:53 PM   #3 (permalink)
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Ouch.
Measure twice, cut once.
Ergo, research twice, buy once.
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Old 06-10-2005, 01:17 PM   #4 (permalink)
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the guy that sold it to your friend!
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Old 06-10-2005, 02:33 PM   #5 (permalink)
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Why is it the P.O. fault?
It sounds like it was your friends fault!
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Old 06-10-2005, 04:58 PM   #6 (permalink)
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time to bore it to 3.3liters
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Old 06-11-2005, 10:04 AM   #7 (permalink)
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Would an M5 V8 fit under that hood, I mean, if you are going to replace the engine, get the biggest one that will fit, or find an engine out of a E46 M3 that has been totaled and put it in there. That would be a fun project!
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Old 06-11-2005, 06:52 PM   #8 (permalink)
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Originally posted by FREDPLT@Jun 11 2005, 08:04 AM
Would an M5 V8 fit under that hood, I mean, if you are going to replace the engine, get the biggest one that will fit, or find an engine out of a E46 M3 that has been totaled and put it in there. That would be a fun project!

[snapback]352645[/snapback]
Yes, by there might be subframe issues.
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Old 06-13-2005, 01:25 PM   #9 (permalink)
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Quote:
Originally posted by '89 635 csi@Jun 10 2005, 11:33 AM
Why is it the P.O. fault?
It sounds like it was your friends fault!
[snapback]352413[/snapback]
The motor exploded 30 miles after owning the m3. He doesnt know ANYTHING about vehicle mechanics. He couldn't even change the oil on the vehicle.

And, the guy that sold him the m3 went out and bought a e46 m3. We are taking him to small claims, and if we cant win/he doesn't pay up, well, we have 2 f250 pickups, with tow winches.. and he parks that e46 in a nice open parking lot which would give lots of room for both of the trucks to start getting up to speed in opposite directions...anyone ever seen gone in 60 seconds?
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