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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Mon, Dec-10-2018, 02:39:49 AM   #1
Euro Spec 73
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Default 1998 323is Serpentine pulley tensioners hydrolic or Mechanical?

How's it going everybody?
I have a 1998 BMW 323is my question is does anybody know if the tensioner pulleys for the serpentine fan belt are hydraulic or mechanical?
I called up my dealer and I gave them the last 7 of the vin and they can't even answer it's so frustrating any real answer will be highly appreciated thank you.
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Old Mon, Dec-10-2018, 02:44:16 AM   #2
Braymond141
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Default Re: 1998 323is Serpentine pulley tensioners hydrolic or Mechanical?

Go out and look. BMW used BOTH randomly on late model cars. Nobody can tell you.
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Old Mon, Dec-10-2018, 04:20:49 AM   #3
bluptgm3
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Default Re: 1998 323is Serpentine pulley tensioners hydrolic or Mechanical?

Though inserting the last seven of your VIN should reveal the answer, www.realoem.com.

Look at it, as mention above.


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Old Mon, Dec-10-2018, 04:22:22 PM   #4
Euro Spec 73
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Default Re: 1998 323is Serpentine pulley tensioners hydrolic or Mechanical?

Quote:
Originally Posted by bluptgm3 View Post
Though inserting the last seven of your VIN should reveal the answer, www.realoem.com.

Look at it, as mention above.


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Okay thanks Blupt For letting me know I'll have to check out that site again.
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Old Tue, Dec-11-2018, 05:38:33 AM   #5
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Default Re: 1998 323is Serpentine pulley tensioners hydrolic or Mechanical?

Actually VIN+RealOEM isn't any good for tensioners because as @Braymond141 says above random cars came with mechanical tensioners.

But... if you're just replacing the tensioner(s) get hydraulic ones to replace whatever you have.

I think you need different bolts if you're going from mechanical to hydraulic but that's it. You can by the lot as an exchange kit (e.g. https://www.bimmerworld.com/Engine/P...-X5-Z3-Z4.html).
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Old Thu, Dec-13-2018, 04:16:38 AM   #6
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Default Re: 1998 323is Serpentine pulley tensioners hydrolic or Mechanical?

Looking is good advice because it will show you how to get better at solving problems independently of others!

However on your vehicle the tensioners are most likely mechanical on the alternator side, and hydraulic on the A/C side.

If you're swapping this part because it is "chirping" or sounds like there is a squirrel under there at idle it might just be the idler pulley(s). These can be removed from the tensioners without taking the whole tensioner off (on either side). Yes, belts still have to come off at least part way.
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Discussing 1998 323is Serpentine pulley tensioners hydrolic or Mechanical? in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)