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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 02-06-2012, 07:17 PM   #1
Iceman00
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TMS Pulley issue

Guys, I don't know what I did wrong here, but my Pulleys are not lining up. The Alternator pulley seems to be more forward than the PS pump, causing the belt to slip off a bit. Any ideas on how I can adjust this?
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Old 02-06-2012, 07:19 PM   #2
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Old 02-06-2012, 07:22 PM   #3
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To which one? I'm not sure which pulley is off "plane"
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Old 02-06-2012, 08:11 PM   #4
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Call up Turner Motorsport & ask them.



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Old 02-06-2012, 11:13 PM   #5
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Old 02-07-2012, 12:28 AM   #6
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I had a similar problem with the Evosport alternator underdrive pulley on my Bosch 120 Amp alternator. It stuck out 2mm or 3mm too far so I installed only the PS and WP pulleys. Evosport confirmed I had the right pulley for an E46 with Bosch alternator, so I've concluded there are two different Bosch alternators. My best theory is these alternator underdrive pulleys are designed for the Bosch alt with the rectangular connector and cooling duct, but I have the Bosch alt with the oval connector and no cooling duct. Evosport (about an hour from me) invited me to come by and if needed they would grind down my pulley to the the right offset from the alternator but I haven't gone there yet.

Do you have a Bosch alternator and is its plug rectangular or oval? If yes, then I say Turner and Evosport designed only one set of E46 Bosch alt pulleys (the thick ones) when they should have designed two, or designed one narrow one with an optional shaft spacer. Let me know what TMS says. Subscribing to this threads for updates.
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Old 02-07-2012, 08:43 AM   #7
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If I recall correctly, I think Turner has two alternator pulley options on their website. I think there is also an option to have them send you both and then when you know which one you need you can send the incorrect one back for a refund.
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Old 02-07-2012, 01:42 PM   #8
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That is true for TMS and Evosport, but the two are for the Bosch and Valeo alternators. If Iceman00 has a Valeo alternator and got the Bosch pulley, or vice versa, then that explains his issue. But if he has a Bosch alternator, got the Bosch alt pulley, and it still sticks out too far, then back to my little theory.
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Old 02-07-2012, 02:15 PM   #9
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Ah gotcha, missed the part about the possiblility of two Bosch alternators.
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Old 02-07-2012, 03:09 PM   #10
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I was almost positive that my car has a Valeo Alternator, but the pulley sticks out about 2mm+ or so. Just called, and I was basically told I might have guessed wrong on my alternator....
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Old 02-08-2012, 11:09 AM   #11
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If you removed your alternator to install the pulley, you should be able to read the Bosch or Valeo on the back. Or remove airbox and use small mirror with flashlight to read back of alternator. Just need to read the lettering backwards with the mirror. Here's what the back of my alternator looks like, along with the old Bosch pulley and the new EvoSport Bosch pulley. The Bosch lettering is black-on-black, but it's readable. You can also see my harness plug is oval, not rectangular.
Attached Thumbnails
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ID:	436080   Click image for larger version

Name:	BoschAlternator_small.JPG
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ID:	436081  
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Old 02-08-2012, 05:08 PM   #12
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I was almost positive that my car has a Valeo Alternator, but the pulley sticks out about 2mm+ or so. Just called, and I was basically told I might have guessed wrong on my alternator....
I went through something similar with my 323 years ago. I have EVOSport pullies and bought the 3 set kit. My car has a Valeo alternator but the pulley they sent me did not fit. I reconfirmed it was Valeo and after going back and forth and looking at pics I determined that somehow I have some ratbastard alternator with a unique pulley. In fact I did a WTB thread here after I'd fscked up the stock one taking it off. EVOSport took back the one and tried to machine it to fit but that didn't help as it needed a bit of a flange. I ended up buying a new factory pulley (for like $55) to get the car back on the road.

I need to send them the old pulley so they can produce the correct one for me. I can take pics of the one I have (the original stock one) if you think that would be helpful.

Cheers.
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Old 02-10-2012, 02:06 AM   #13
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I might just disassemble the whole thing to figure out what's going on. I bet you I have a Bosch alternator....
As for the pulleys themselves, I feel a slight power gain, and the car seems to be more peppy. We'll see.
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Old 02-10-2012, 10:13 PM   #14
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i had a similar problem but mine was the h2o pulley, shimmed it out a few mm with washers, been fine since !!
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Old 02-11-2012, 12:22 AM   #15
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I could try that if my alt pulley was too short (thin). But it's too tall/thick. My Evosport WP and P/S pulleys fit perfectly out of the box. I should have measured the height difference between the stock and new alt pulleys very carefully. Then I could have just taken the pulley to Evosport to get it machined. Now to be sure I have to pull out the alternator again.
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Old 02-17-2012, 06:54 PM   #16
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My final resolution is I visited Evosport yesterday. They took good care of me, resolved it with a little precision machining, and my car finally has all 3 of the underdrive pulleys going. So Evosport customer services gets a from me.

Their shop is impressive with lots of race and track cars being developed or maintained there--BMW/Mercedes/Porsche.
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Old 02-18-2012, 03:24 AM   #17
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Mine still isn't resolved yet, and I kinda don't care at this point. The alternator is whining and will probably take a dump soon. Oh wells, maybe I'll get the right one to fit the pulley this time.
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Old 02-18-2012, 03:54 AM   #18
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Question: how much of a difference does it make by changing the pulleys and which one is better evo sport or TMS?
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Old 02-18-2012, 12:03 PM   #19
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Question: how much of a difference does it make by changing the pulleys and which one is better evo sport or TMS?
The only reason I went with TMS is because I was buying other parts at the same time, so I saved a little on the shipping. Evosports are cheaper, but came up to near the same cost with shipping. I'd be surprised if there was a power difference between the two.
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Old 02-18-2012, 12:58 PM   #20
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Ice, & whoever else;

I'm just not a fan of changing out the alternator pulley, If there's any gain at all, I doubt it could be measured. The down side though is bigger, your Bimmer might not like you messing with its voltage requirements, that's why half of the manufactures don't even make an alt. pulley in the first place.

Edit: I need to be more specific, if you buy an under drive pulley kit that comes with an alt. pulley, my thoughts are to buy one with the stock size. As in an alt. pulley that is not under driven, you'll get the reduced weight, but it won't mess with your electrical system.


Good luck.
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