I believe my supercharger has gone south. What to do next?

"Niquemarshall" (dominiquemarshall) 02/26/2014 at 17:13 • Filed to: None

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2004 Mini Cooper S, 127k. It was also rear ended not long ago, which seems to have triggered this, but maybe I'm dreaming.

crowmolly > Niquemarshall 02/26/2014 at 17:17

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What's wrong? Not building boost? Grinding noise? Gotta post more info.

I believe you have an Eaton M45. If it's like my Eaton M90s were it may kill its bearings and/or break the coupler. Both of which are repairable.

Coupler damage is so common that there's a kit for it:

http://www.superchargersonline.com/index.php?main…

IDROVEAPICKUPTRUCK > Niquemarshall 02/26/2014 at 17:18

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I don't see how being rear ended would affect the supercharger. The first thing I would check would be the belt and the tensioner just because those would be the cheapest and easiest to fix

Casper > Niquemarshall 02/26/2014 at 17:22

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Just work down the list:
Have you been keeping it supplied with oil?
Is the belt in good shape/tight enough?
Were there filing or anything the last time the oil was changed?
Does it build any boost at all?
Do you have a bad pressure retention control (spring or diaphragm, don't remember on Coopers)?

Eventually you will find your answer.

Niquemarshall > crowmolly 02/26/2014 at 17:26

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It's not boosting, and the belt is squealing. There isn't a grinding noise, just a weird chirping.

Niquemarshall > Casper 02/26/2014 at 17:27

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On these cars, the SCs aren't serviceable. So you'd have to remove it completely, then disassemble the blower.

crowmolly > Niquemarshall 02/26/2014 at 17:28

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Bad tensioner and belt. Check them first.

crowmolly > Niquemarshall 02/26/2014 at 17:29

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You should be able to change the oil through an hex head plug. Should take about 6 0z. of fluid.

Casper > Niquemarshall 02/26/2014 at 17:30

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Did you do the service on it at either 80k or 100k?

jkm7680 > Niquemarshall 02/26/2014 at 17:30

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Ouch, those things are expensive. Best of luck to you!

Casper > Niquemarshall 02/26/2014 at 17:33

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https://wiki.bentleypublishers.com/display/tech/2…

BrianMadigan > Niquemarshall 02/26/2014 at 17:42

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video would help. Either the belt's slipping or the supercharger has shagged a bearing or two.

JEM > Niquemarshall 02/26/2014 at 18:13

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Move somewhere warmer and follow it?

Niquemarshall > Casper 02/26/2014 at 18:29

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Thanks!