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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 Tue, Oct-31-2017, 01:00:30 PM   #11
pbonsalb
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Default Re: PS Pulley looks a wee tight to you?

Id change to an allen head bolt if the head is a little smaller, assuming the pulley is the correct underdrive. I recall the fit being close but have not looked at my PS pulley in years and it's a UUC. I run a stick size aluminum water pump pulley since a Stewart pump should not cavitate at whatever speed it is driven to at my 7200 limiter.
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Old Tue, Oct-31-2017, 03:03:44 PM   #12
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Default Re: PS Pulley looks a wee tight to you?

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Originally Posted by pbonsalb View Post
I run a stock size aluminum water pump pulley since a Stewart pump should not cavitate at whatever speed it is driven to at my 7200 limiter.

The Stewart literature recommends not under driving their pumps, in general. Not sure if that applies to the BMW specific pump.



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Old Tue, Oct-31-2017, 03:41:14 PM   #13
MaynardZed
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Default Re: PS Pulley looks a wee tight to you?

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Originally Posted by bluptgm3 View Post
The Stewart literature recommends not under driving their pumps, in general. Not sure if that applies to the BMW specific pump.



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Been racing with a Stewart pump and underdrive pulley (Turner I think as well) for over 4 years, over 50 track days. FWIW
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Old Tue, Oct-31-2017, 04:04:42 PM   #14
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Default Re: PS Pulley looks a wee tight to you?

As long as it is cooling properly, no worries. For a naturally aspirated track car with no AC, I would not worry about underdriving the Stewart pump. Even underdriven, it probably moves as much coolant as a stock pump, without risk of cavitation at higher redlines.

I chose the aftermarket stock size metal pulley since I have a turbo and AC and a full weight car and all that power can put a lot of thermal load on the motor although I don't track the car.
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Old Tue, Nov-07-2017, 02:51:12 PM   #15
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Default Re: PS Pulley looks a wee tight to you?

So what is the resolution to this issue?


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Old Tue, Nov-07-2017, 03:37:09 PM   #16
abcurran
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Default Re: PS Pulley looks a wee tight to you?

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Originally Posted by Braymond141 View Post
I would personally cut away the pulley before touching the OE side.
Agree. Assuming the pulley is correct, best to get the pulley on a lathe and turn down that last rib, provided doing so won't interfere with the bolt.

Alternatively, you could try grinding down the top of the bolt head instead of fiddling with the washer to ensure even clamping pressure.
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Old Tue, Nov-07-2017, 03:45:34 PM   #17
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Default Re: PS Pulley looks a wee tight to you?

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Originally Posted by bluptgm3 View Post
So what is the resolution to this issue?


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I ordered a new pulley. It will arrive this week.
If the pulley is correct then I'll attempt to return the original one they shipped me some time ago. If it still doesn't fit then I'll try to return everything (water pump pulley, alternator pulley, PS pulley) and go OEM size.

Turner was responsive at first but has gone dark. Very annoying.

I'll post the outcome.
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Old Mon, Nov-13-2017, 09:07:30 PM   #18
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Default Re: PS Pulley looks a wee tight to you?

My car had this kit already installed and I took some pics of the pulleys a while back to see what it was:

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Old Mon, Nov-13-2017, 09:32:57 PM   #19
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Default Re: PS Pulley looks a wee tight to you?

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My car had this kit already installed and I took some pics of the pulleys a while back to see what it was:
Thanks. I'm pretty sure they sent me the wrong pulley. New one hasn't arrived yet (any day). I thought I fast shipped only to discover it is coming ground.
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Old Sat, Nov-18-2017, 07:06:27 PM   #20
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Default Re: PS Pulley looks a wee tight to you?

The new pulley arrived and it fits. Pretty tight clearance but enough. Thanks!
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Discussing PS Pulley looks a wee tight to you? 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)