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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 Sat, Dec-01-2018, 02:52:13 AM   #31
frbz
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Default Re: Squeaky belt/pulley/tensioner - help diagnose

The S54 and S50b3x water pumps are supposed to be far more robust than the US spec parts. Is this true?
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Old Sun, Dec-02-2018, 09:39:06 PM   #32
M3Stang
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Default Re: Squeaky belt/pulley/tensioner - help diagnose

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Originally Posted by NolliM3 View Post
I would place my money on the idler pulley...encircled in green. A better-diagnosis would be to use a mechanic stethoscope.
+1 on the stethoscope. Used one to diagnose this noise in the below video. Turned out to be the alternator. Who would have thought.
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Old Mon, Dec-03-2018, 02:20:44 AM   #33
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Default Squeaky belt/pulley/tensioner - help diagnose

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Originally Posted by Braymond141 View Post
The tensioner itself has no replaceable parts. The available needle bearings for the pitman arm are almost unreasonably expensive, even with wholesale discounts. You might as well buy the complete INA assemblies when you factor in the pain of dealing with bearing swapping, and your old cruddy aluminum parts.
Plus the likelihood that the pivot shaft is bad is likely as the bearings/mechanism is not sealed.

All of the assembled parts are available individually, see www.realoem.com. As stated, it is far less expensive to purchase the INA packaged items as the BMW packaged INA part are very expensive.




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Last edited by bluptgm3; Mon, Dec-03-2018 at 02:24:10 AM.
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Old Mon, Dec-03-2018, 02:28:51 AM   #34
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Default Re: Squeaky belt/pulley/tensioner - help diagnose

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Originally Posted by propchef View Post
This was very helpful, thanks. I removed the fan and loosened the shroud. I had enough room to get everything done and lost less than a cup of coolant.


No need to displace the shroud to tackle this replacement.




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Old Mon, Dec-03-2018, 03:38:23 PM   #35
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Default Re: Squeaky belt/pulley/tensioner - help diagnose

^^^it would have been far more difficult if I hadn't. Took me 2 minutes to loosen the shroud.

I didn't go from underneath because I have the MM underpanel and didn't want to remove that.
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Discussing Squeaky belt/pulley/tensioner - help diagnose 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)