E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > DIY: Do It Yourself

DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

Reply
 
Thread Tools Search this Thread Rating: Thread Rating: 1 votes, 5.00 average. Display Modes
Old 02-20-2013, 02:38 PM   #1
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
I'm stupid. Where exactly is the tensioner?

I'm trying to remove my alternator but can't figure out which bolt releases the tensioner.

Attached is a pic.

Is it the 16mm attached to the alternator, or the one below the belt on bottom of pic which is 13mm? Or something completely different?

Sorry, it's 10degrees outside and I am probably just being dumb. Thanks
Attached Thumbnails
Click image for larger version

Name:	tensioner.JPG
Views:	96
Size:	135.7 KB
ID:	491583  
clwolf is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 02-20-2013, 02:39 PM   #2
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
ack, somehow [oc flipped upside down.

so bolt in middle of alternator area, or bolt on the very top. Tried putting arrows on them as well.

Thanks
clwolf is offline   Reply With Quote
Old 02-20-2013, 03:52 PM   #3
e46crooser
Registered User
 
Join Date: Jul 2009
Location: Brentwood, CA
Posts: 63
My Ride: 99 328 5spd
Depends on whether you have the mechanical tensioner or hydraulic (shock) style tensioner.
-The higher 16mm bolt head located above the alternator (deflection pulley bolt) holds the top part of alternator in. Further down you'll see either a 16mm bolt on the mechanical tensioner to release tension on drive belt. If you have a shock style tensioner then you'll remove the cover off the pulley and use the 8mm allen on the pulley to release the tension.

HTH
e46crooser is offline   Reply With Quote
Old 02-20-2013, 04:06 PM   #4
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
so no where on the pic?
clwolf is offline   Reply With Quote
Old 02-20-2013, 04:14 PM   #5
tks
Registered User
 
Join Date: May 2010
Location: Online
Posts: 839
My Ride: slower than yours
it's starting to come into the picture at the right, but no. more on the bottom, the belt wraps around it just search a little harder

it could either be a torx 25 iirc if you have sedan (i am guessing but have seen it done & unsure of the size) , or an 8mm hex bolt (what i have in my coupe)

make sure you go slowly or you will mess up the threads when untensioning it!!

so anyways, two possibilities
tks is offline   Reply With Quote
Old 02-20-2013, 04:17 PM   #6
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
Ok. Yes, I have a sedan. 325xi. 2003.

I"m gonna try and take another pic.
clwolf is offline   Reply With Quote
Old 02-20-2013, 05:23 PM   #7
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
do these help?

I'm so confused and it is probably staring right at me.
Attached Thumbnails
Click image for larger version

Name:	2013-02-20 16.07.36.jpg
Views:	62
Size:	41.5 KB
ID:	491640   Click image for larger version

Name:	2013-02-20 16.07.47.jpg
Views:	64
Size:	48.3 KB
ID:	491641   Click image for larger version

Name:	2013-02-20 16.07.53.jpg
Views:	51
Size:	36.9 KB
ID:	491642   Click image for larger version

Name:	2013-02-20 16.08.09.jpg
Views:	47
Size:	42.9 KB
ID:	491643  

clwolf is offline   Reply With Quote
Old 02-20-2013, 05:35 PM   #8
tks
Registered User
 
Join Date: May 2010
Location: Online
Posts: 839
My Ride: slower than yours
pop the cover off of the pulley in the second picture
tks is offline   Reply With Quote
Old 02-20-2013, 05:36 PM   #9
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
so I popped the wrong cover off! Got it. Thanks so much!
clwolf is offline   Reply With Quote
Old 02-20-2013, 05:36 PM   #10
tks
Registered User
 
Join Date: May 2010
Location: Online
Posts: 839
My Ride: slower than yours
here's mine 02 330ci finger pointing at it

i know it's dark looking but go take a look at yours again!
Attached Thumbnails
Click image for larger version

Name:	ImageUploadedByBimmerApp1361399789.726844.jpg
Views:	58
Size:	74.1 KB
ID:	491648  
tks is offline   Reply With Quote
Old 02-20-2013, 05:43 PM   #11
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
Perfect. Thanks. You leave your covers off all the time?
clwolf is offline   Reply With Quote
Old 02-20-2013, 06:18 PM   #12
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
I think I found it. Now what size? I have torx sockets, but I don't have allen sockets. If it's allen I will need to go to a store and buy it.

Thanks again!
Attached Thumbnails
Click image for larger version

Name:	2013-02-20 17.06.09.jpg
Views:	42
Size:	82.5 KB
ID:	491659  
clwolf is offline   Reply With Quote
Old 02-21-2013, 04:08 PM   #13
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
8mm allen?
clwolf is offline   Reply With Quote
Old 02-21-2013, 04:36 PM   #14
dmax
Registered User
 
dmax's Avatar
 
Join Date: Aug 2006
Location: NJ
Posts: 22,859
My Ride: '99 328i 1.04646 mu
You can get a set of allen bits at harbor freight for maybe $10-20 tops...get all the ones you might need. I'm glad you took photo...many assume it's what they're told here and end up using a hex in a torx screw or vice versa and strip it.

8 looks about right...but don't forget there's always a chance someone used an aftermarket screw that takes a different size. Always check...stick it in by hand...if it wobbles, go the next size up...it'll either fit nicely or not. Be careful...if say, you used a 7, you might get it to turn, but you might also strip is. Trust your feel and check every bolt/nut for size yourself. You'll probably run into exceptions in a few spots along your DIY career.

Oh, and my 14" 1/2" breaker bar is perfect for the tensioner...if you get a 3/8" bit set, you can get an adaptor to go from 1/2" to 3/8" and use that larger breaker bar on a lot of tough to loosen bolts/nuts.

HTH
__________________


Performing at the Comedy Cove--595 Morris Ave. Springfield NJ reservations 973 376-3840

A recent set Skip to 1:30

Last edited by dmax; 02-21-2013 at 04:37 PM. Reason: Auto-save 1361482651
dmax is offline   Reply With Quote
Old 02-21-2013, 04:40 PM   #15
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
Good idea on the adaptor. I have a 1/2 breaker bar that would be perfect as well.

Yeah, I have replaced at least a dozen alternators in my life, and have never had such a hard time. Must be my old age!
clwolf is offline   Reply With Quote
Old 02-21-2013, 07:36 PM   #16
tks
Registered User
 
Join Date: May 2010
Location: Online
Posts: 839
My Ride: slower than yours
I had a problem with mine the first time too, exactly as you put it and I actually was tightening (thinking the pulley was stuck) the bolt above... then I realised it was the 8mm allen underneath it haha.

Hope it went well for you and now you can do it easier for next time :p
tks is offline   Reply With Quote
Old 03-02-2013, 12:42 PM   #17
clwolf
Registered User
 
Join Date: Nov 2006
Location: Milwaukee, WI
Posts: 159
My Ride: 2003 325xi
Finally life got out of the way and I was able to work on my car.

Took belt off alternator in less than 10 seconds. Amazing when you have the right tools and actually using them in the right place how things work! Thanks ruskisky and dmax!
clwolf is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 06:01 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use