Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)

E85 / E86 Z4 (2003-2008)
E85 Z4 convertible and E86 Z4 coupe talk with our BMW gurus here.

Reply
 
Thread Tools Display Modes
  #1  
Old 08-06-2012, 05:35 PM
papitosabe's Avatar
papitosabe papitosabe is offline
WalkTheWalk
Location: Houston
 
Join Date: Apr 2007
Posts: 247
Mein Auto: 06 Z4 Coupe
Z4 Starter Issue?? Legit?

I have a 2006 Z4 Coupe. I recently got some work done on my car due to an accident. I got the car back, but I still had a clutch issue which I took back and they fixed. When I got the car returned to me and my car turns on fine, no hesitation, but i can hear a loud enough noise when the car turns on. Then goes away after about a second. I can only explain it as kind of like a scratching ,grindish noise. BMW says its the starter and they can do the job, for about $800. The starter had no issues before/after the wreck, and there were no noises until after they installed the clutch. Are they trying to put on over on me, or does this sound legit?

Last edited by papitosabe; 08-06-2012 at 07:39 PM.
Reply With Quote
Ads by Google
  #2  
Old 08-06-2012, 09:30 PM
IgotBMW's Avatar
IgotBMW IgotBMW is offline
BE IRIE
Location: So Cal
 
Join Date: Jul 2010
Posts: 757
Mein Auto: 1996 Z3 1.9L M44
Does it make that sound right after you turn over the engine, then you hear a big scratch/grinding sound?

If so, that's the starter. What's happening is the drive gear in the starter is not retracting as it should and makes contact with the flywheel as it spins.

How many miles on the Z?
__________________

1996 Z3 (M44)
Reply With Quote
  #3  
Old 08-06-2012, 09:46 PM
papitosabe's Avatar
papitosabe papitosabe is offline
WalkTheWalk
Location: Houston
 
Join Date: Apr 2007
Posts: 247
Mein Auto: 06 Z4 Coupe
Quote:
Originally Posted by IgotBMW View Post
Does it make that sound right after you turn over the engine, then you hear a big scratch/grinding sound?

If so, that's the starter. What's happening is the drive gear in the starter is not retracting as it should and makes contact with the flywheel as it spins.

How many miles on the Z?
yes, its immediately after, and it lasts maybe a second with that scratchy/grind sound...but there is no stutter or hesitation whatsoever when I start the engine...had someone tell me that when they changed the clutch, maybe they didn't align the starter correctly to the ring gear ...is the ring gear different from the flywheel? 5,000 miles, but again, didn't have any issue before or after the accident, and even when I got it back before the clutch issue, it didn't make any sounds..

Last edited by papitosabe; 08-06-2012 at 09:51 PM.
Reply With Quote
  #4  
Old 08-06-2012, 10:34 PM
WestCDA WestCDA is offline
Officially Welcomed to the 'Fest
Location: Calgary, AB
 
Join Date: Mar 2011
Posts: 168
Mein Auto: 2006 Z4 3.0si
The ring gear is pressed on to the outside of the flywheel - they are essentially joined together as one piece. When the starter is turning, a small gear extends on the starter shaft to engage the ring gear - when you release the key, that gear should almost immediately disengage.

On older starters grinding can happen as the lubrication goes away on that sliding starter gear, or as the override clutch/spring wears out - but it can also occur with a good starter when not mounted at the right distance and angle from the ring gear. On some vehicles shims are used to set the correct spacing.

If the noise was not happening at all before your clutch work, and is happening now 100 percent of the time, I'd be pretty sure they got something out of whack when they put it back together.
Reply With Quote
  #5  
Old 08-06-2012, 11:09 PM
papitosabe's Avatar
papitosabe papitosabe is offline
WalkTheWalk
Location: Houston
 
Join Date: Apr 2007
Posts: 247
Mein Auto: 06 Z4 Coupe
Quote:
Originally Posted by WestCDA View Post
The ring gear is pressed on to the outside of the flywheel - they are essentially joined together as one piece. When the starter is turning, a small gear extends on the starter shaft to engage the ring gear - when you release the key, that gear should almost immediately disengage.

On older starters grinding can happen as the lubrication goes away on that sliding starter gear, or as the override clutch/spring wears out - but it can also occur with a good starter when not mounted at the right distance and angle from the ring gear. On some vehicles shims are used to set the correct spacing.

If the noise was not happening at all before your clutch work, and is happening now 100 percent of the time, I'd be pretty sure they got something out of whack when they put it back together.
makes sense...thank you..i also read that many bmw bosch oem starters don't have shims..do you know that to be true or not?
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E85 / E86 Z4 (2003-2008)
Today's Posts Search
Thread Tools
Display Modes

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



Forum Jump


All times are GMT -7. The time now is 01:25 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms