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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 02-16-2014, 12:03 PM
Rilloroc Rilloroc is offline
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Location: Texas
 
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Alternator Coolant Pipe.

The car has been parked for quite awhile since I have been fixing miscellaneous problems. Today when I started it up I found a new leak. I'm leaking coolant where the pipe for the alternator fits into the water pump. My question is this. I'm already about to drop the alternator bracket so I can replace the t gasket behind that. Will I be able to replace the coolant pipe then or will I have to pull the water pump as well?
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  #2  
Old 02-17-2014, 09:20 PM
Ggreg Ggreg is offline
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You can replace the cooling tube between the water pump and the alternator by removing the alternator to fix the oil leak behind the alternator bracket. Good luck.....
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  #3  
Old 02-18-2014, 05:29 AM
Rilloroc Rilloroc is offline
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I have everything out now except for the motor mount and the bracket. Does that pipe have any o-rings or anything? I'm asking because the pipe itself isn't leaking. The mating point between the pipe and the water pump is where I'm having the leak. My local dealer doesn't have the pipe so I'm going to have to order it if I need to replace the whole pipe.
I still haven't seen the motor mount I'm supposed to be loosening.
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  #4  
Old 02-18-2014, 08:07 AM
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mybmw408 mybmw408 is offline
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The motor mount is right underneath the bracket. I believe it was two screws underneath the car then four screws on the block for the motor mount and one bolt going from the top through the motor mount bracket into the motor mount. You are going to have to put the car on jackstands and raise the motor up just enough so you can get the bolts out of the motor mount bracket. If you take the driver side wheel off it is easier to get in there when you lay down on the floor you can see, after you take the rim off.


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  #5  
Old 02-18-2014, 10:00 AM
Rilloroc Rilloroc is offline
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I ran out of daylight yesterday. When I get off work today I'll take another look. I'm getting a pressure washer today because there is ten years worth of gunk on everything and cleaning it by hand isn't cutting it.
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  #6  
Old 02-18-2014, 12:19 PM
Ggreg Ggreg is offline
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Quote:
Originally Posted by Rilloroc View Post
I have everything out now except for the motor mount and the bracket. Does that pipe have any o-rings or anything? I'm asking because the pipe itself isn't leaking. The mating point between the pipe and the water pump is where I'm having the leak. My local dealer doesn't have the pipe so I'm going to have to order it if I need to replace the whole pipe.
I still haven't seen the motor mount I'm supposed to be loosening.
There is an o-ring on each end of the pipe. The o-ring is compressed by pushing the pipe into a machined bore in the water pump and alternator. There are no bolts that hold the pipe.
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  #7  
Old 02-18-2014, 01:11 PM
Rilloroc Rilloroc is offline
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You wouldn't know the part number for those would you, or what size they are?
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  #8  
Old 02-18-2014, 01:56 PM
Ggreg Ggreg is offline
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Quote:
Originally Posted by Rilloroc View Post
You wouldn't know the part number for those would you, or what size they are?
Pipe with o-rings is as follows:
03 Feed pipe to alternator 1 10/2003 12311439988 $14.08


Don't think BMW sells the o-rings separately. I would just order the whole pipe since it is made out of a composite/plastic material and is subject to degradation.
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  #9  
Old 02-18-2014, 02:16 PM
Rilloroc Rilloroc is offline
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Thanks. I most certainly will.
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  #10  
Old 02-18-2014, 05:45 PM
Rilloroc Rilloroc is offline
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I ordered the pipe today. So I guess while I'm waiting for that I will replace the valve cover and spark plug tubes on the right side. When I changed the plugs I found oil in one of them. I'll also be servicing the transmission. Those parts all arrived today.
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