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6 Series
The BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 05-19-2011, 07:39 PM
the6dude the6dude is online now
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Mein Auto: 645Ci
Alternator replacement???

Hey guys has anyone attempted an alternator installation?

I have searched the DIY thread and didn't see anything close to a DIY. I was wondering how difficult it is to do it yourself and if anyone has done it or has any advice.

Any input will be greatly appreciated!
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  #2  
Old 05-19-2011, 08:09 PM
HerbP HerbP is offline
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If you removing the radiator cooling fan, it will give you access to the alternator. I think you need to remove the serpitine belt, 2 bolts on alternator, 12v wire on alternator, & one plug off of the alternator. You then have to snake the alternator out from the bracket, then bring it out the top. Around 2 hours if you are handy.

Don't forget to remove the battery wires!

BMW TIS - 12 31 020 Removing and installing or replacing alternator (N62, N62TU)



12 31 020

Removing and installing or replacing alternator (N62, N62TU)





Necessary preliminary tasks:
· Switch off ignition
· Follow instructions for disconnecting and connecting battery
· Disconnect battery negative lead and cover
· Remove fan cowl with electric fan
· Remove alternator drive belt





Important!
Risk of damage!
Cover radiator.





Remove cover ***9312; and release screw underneath.
Remove deflecting element ***9313;.





Unfasten screws.
Pull alternator ***9312; forwards until connections are accessible.





Unlock plug (1) and remove.
Remove cover ***9313; and release nut underneath.
Disconnect battery positive lead from alternator.






No posts yet.
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  #3  
Old 05-20-2011, 08:23 AM
the6dude the6dude is online now
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Seems like it may be pretty straight forward. Are there any other things I should think about relpacing while I'm in there? Maybe a new belt or a alternator bracket gasket? Also I'm thinking the battery should be replaced as well? I have a 04 and I think it still has the original battery. The indicator is black (not fully charged)?
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  #4  
Old 05-20-2011, 08:46 AM
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Yorgi Yorgi is offline
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Wow, you still have the original battery in an '04? That must be a record.

I would do the battery and belts while you are in there.

Here are the instructions with a few pics.
Alternative instructions for an older version of the alternator.

If the belt tensioning pulley looks iffy I would replace it too but it looks like there may be 2 of them, one $50 and one $100. They tend to start squeaking when they get old.
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Last edited by Yorgi; 05-20-2011 at 08:48 AM. Reason: fix URL
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  #5  
Old 05-20-2011, 12:04 PM
HerbP HerbP is offline
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To get to the alternator gasket. You will have to jack up the motor, & remove the motor mount. Then you can get to all of the alternator bracket bolts. The 3 motor mount bolts are a torx male head. The one in the front will require a wrench to get off. I found that a Gearwrench 3/8" wrench will work. I could not find any torx wrench's in town. It is around a 6 to 8 hour job.
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  #6  
Old 05-20-2011, 05:07 PM
the6dude the6dude is online now
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Thanks HerbP and Yorgi! I think I'll pass on the bracket gasket though unless it's leaking. I'll try to take a few photos and put together a quick DIY to help others. By the way, has anyone tried a auto zone or advanced auto battery for the 6? Got a $50 off coupon
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  #7  
Old 05-20-2011, 06:18 PM
HerbP HerbP is offline
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Others have used generic batteries, but I am not sure of the results. You will have to have the battery registered with the car, so it will charge properly. You might want to check around with some Indy's for suggestions on batteries they have installed.


I see that you are not far from me. I have DIS & Inpa running on a Laptop. I am down is Augusta! Let me know if I could help out!
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  #8  
Old 05-20-2011, 07:57 PM
the6dude the6dude is online now
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I may take you up on that after this alternator install! I've heard a lot about DIS & Inpa. Powerful programs, I'd like to learn more about them. Do you do diagnostics? error codes? what do you normally use them for?
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  #9  
Old 05-21-2011, 04:38 PM
HerbP HerbP is offline
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Quote:
Originally Posted by the6dude View Post
I may take you up on that after this alternator install! I've heard a lot about DIS & Inpa. Powerful programs, I'd like to learn more about them. Do you do diagnostics? error codes? what do you normally use them for?
DIS can basically do anything that BMW tech can do. Using the software, is touch & go. There are no instructions that come with the software. You would have to see it to understand how it works!
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  #10  
Old 06-14-2011, 06:29 PM
the6dude the6dude is online now
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OK guys, I know it has been a while but I got my alternator today and started the job. I'll do my best to take good pics and write up a decent DIY. Looks like it may be a 4.5 hr job based on what I got accomplished today.
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  #11  
Old 02-14-2014, 01:37 PM
cessna823 cessna823 is offline
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2006 BMW 750Li Alternator Removal:


Alternator Removes out of the top of Vehicle.

Note: I removed the lower and upper radiator hoses and small Coolant Hoses From Water Pump Housing. I pull the release springs and then using little force with Crow Foot and my hand pull away from water pump just to get the hose to move .0003 of inch then spray lubrication oil and then work hose in and out lubricating as needed. I use White Lithium Grease upon reinstallation of All Hoses. ..




In Right Side - Trunk Disconnect the Negative Battery Cable

Jack up car in under engine

Use jack stands to support

Remove lower plastic skid plate

Drain Radiator Right Side Lower is the Drain plug…Unscrew then loosen Radiator Cap.

Look Left side Lower / Radiator you see the transmission cooler housing look at bottom you see a plastic release with a 90’ degree handle, pull down gently till stops, this unlock the inlet port of cooler housing.

Take note: use a crow foot and gently work the Transmission cooler housing loose off the radiator inlet port, there is O –ring that seal the port to the cooler housing, Once loose the cooler housing hangs on right and left side hanger, Wiggle off hangers and allow cooler to drop and hold with buggie cords.

Remove Jack Stand / Lower Vehicle


Left side / drivers side Remove the Air Filter Housing, 2 Screws hold housing to support

Remove the Top Engine Cover , 4 – 10 mm bolts

Remove 10 -Torex Bolts Across Center Cover then remove cover from over Radiator.

Right Side / passenger side unplug single Radiator Electric Cooling Fan Connector

Remove 4 Torex Screws from top plastic radiator support, 2 Torex screws on each side L/R Note may have to wiggle A/C pressure lines to gain access to Right Side T-screws.

Left Top Cover with Cooler Assembly together and rotate to top of motor

Gently wiggle Radiator Cooling Fan Assembly Up and remove.


With Upper / Lower Radiator Hose Remove from Radiator Gently wiggle Radiator Up And Away from Vehicle.

Loosen 12volt Battery wire from hold down clamps and the Regulator Sending wires from the Hold clamps On Left Front Valve Cover.

Using 16mm Socket Loosen 2 Alternator bolts and using crow foot wiggle Alternator away form engine and forward


Remove single Regulator wire plug and 12 volt Single Battery Wire, Now Remove Alternator out of the vehicle.


Reverse Procedure To Install -------------------------------
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