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Old 05-08-2011, 05:23 AM   #1
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Unhappy Supercharger noise problem

My MP62 SC has devloped a noise that sounds like a diesel engine is running. I have recorded the sound and if you think that it would help you help me I would be very happy to email the WAV file to you.

A little history:

2001 Miata
50K miles on car
25K miles on SC
I suspect the previous owner(PO) was a spirited driver and used the available hp as I have.
PO changed the SC internal oil 1500 miles ago.
Running 11psi max

Please PM me if you would like/need that WAV file.

Thank you.
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Old 05-08-2011, 09:41 AM   #2
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does it sound like marbles clanging around? The M62 on the Cobalt SS' had the same problem.....

.....it's the coupler in the snout of the supercharger! Easy fix though. The coupler should only be about $30
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Old 05-08-2011, 01:24 PM   #3
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at 25k miles it's over do for a soft rebuild (replace rubber parts, regress and new oil)
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Old 05-08-2011, 01:27 PM   #4
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The coupler is one of the rubber parts that jeff mentioned. An oil change wouldn't hurt either!

Just don't overfill it or you'll be decreasing the life of the supercharger
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Old 05-08-2011, 02:24 PM   #5
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superchargers are obviously more reliable than turbochargers.
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Old 05-08-2011, 02:28 PM   #6
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Quote:
Originally Posted by hustler View Post
superchargers are obviously more reliable than turbochargers.
Don't you replace all of the seals on your turbo every 25k miles?
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Old 05-08-2011, 06:00 PM   #7
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Quote:
Originally Posted by spitefulcheerio View Post
Just don't overfill it or you'll be decreasing the life of the supercharger
by a rebuild kit, it comes with everything you need and premeasured oil

Quote:
Originally Posted by Jeff_Ciesielski View Post
Don't you replace all of the seals on your turbo every 25k miles?
there are no seals you need to replace, you just have to change the oil. if you wanted to you could drill it out and run a cooler and pump like a centrifugal but it's not needed.
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Old 05-09-2011, 05:56 AM   #8
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Quote:
Originally Posted by jeff_man View Post
there are no seals you need to replace, you just have to change the oil. if you wanted to you could drill it out and run a cooler and pump like a centrifugal but it's not needed.
I personally would recommend changing main bearing seal in the nose section whilst you have it all apart. Once you have the nose pulley off it takes 20 seconds to change it.

Size is 20mm x 52mm x 7mm I replaced mine with a Viton type seal just to be doubly sure.
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Old 05-10-2011, 08:05 PM   #9
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Thumbs up It's fixed

Hi All,

A thank you to all that took the time to reply; I valued all your input, expertise and wit.

I have been spared. The consensus was to replace the coupler and while there replace the bearing. Well, after removing the SC belt I noticed that the SC nose pulley was not on tight. Not by much but none the less had to be tightened. And there you have it my first repair to my newly acquired machine. The fun goes on in Western Massachusetts.

Thanks again,

Eliano
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Old 05-20-2011, 07:09 AM   #10
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Glad to hear it was caught early.
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