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BMW E65 7 Series 2002 and later (745i) 05 E65 charging issue


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Last Post: Nov 25, 2012 6:28 PM Last Post By: Jankirby
Rick1

Posts: 13
Registered: 10/25/09
05 E65 charging issue
Posted: Oct 25, 2009 6:19 PM
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Have a 05 E65 charging at 18.5 volts, shuts down the whole vehicle. Check th battery - it was cooked,replaced it - Alt. still charging at 18.5 volts, Desired voltage is 14.5 according to the scanner.
Im assuming desired voltage is what the DME is requesting the Alternator to put out.

Just wondering how common Alternator failure is on these vehicles?

Rick
Charlie

Posts: 4,776
Registered: 12/09/03
Re: 05 E65 charging issue
Posted: Oct 26, 2009 1:03 PM   in response to: Rick1 in response to: Rick1
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I would suggest you take a look at the power module on the battery.

Read about the function of this part on www.bmwtis.com under training. A $30 subscription fee could save you lots of time and tail chasing.

Good luck, -Charlie
Rick1

Posts: 13
Registered: 10/25/09
Re: 05 E65 charging issue
Posted: Oct 26, 2009 1:29 PM   in response to: Charlie in response to: Charlie
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Car is fixed - Installed new battery,alternator, and regestered battery and did a manual reboot before connecting battery while I was replacing Alternator.
Charging like its supposed to.

Had to see info on battery and alternator through power supply and Dme was requesting Alt.to charge at 14.5 volts but there was an internal problem with alternator that caused it to charge over 18 volts.

Now I have a new problem - I see coolant coming out of the weep hole on water pump - I know its not the water pump thats leaking.

Thanks for your response
Rick
Charlie

Posts: 4,776
Registered: 12/09/03
Re: 05 E65 charging issue
Posted: Oct 26, 2009 2:34 PM   in response to: Rick1 in response to: Rick1
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Attachment N62.tif (384.8 KB)
There's a common problem on the N62 motors. The coolant pipe that runs across the engine under the intake manifold (see attachment). The $2 O-ring leaks. The job is a big one, bills out at something like 16 hours. Some guys are carefully pulling the front timing chain cover and doing it that way, but tricky to do right. There is someone talking about making a two-peice expandable tube to do the job from above. Not sure if it's on the market yet though. Good luck.
Jankirby

Posts: 1
Registered: 11/25/12
Re: 05 E65 charging issue
Posted: Nov 25, 2012 6:28 PM   in response to: Charlie in response to: Charlie
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There is a 2 piece coolant pipe on the market for the E65 cars, I have repaired a 745i with a 2 piece pipe & it works great & saves a tremendous amount of time & money.

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