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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 01-19-2012, 11:03 AM
the fly the fly is offline
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vacuum pump leak repair -- success!

Hey all

Just thought I'd share the info in case it helps anyone. I had the common issue of an oil leak from my vacuum pump on my '06 750. I researched the forum and found that people recommended replacing the vac pump o-ring that mates to the head and/or oil pressure switch just underneath the pump.

I did both to no avail -- still had a small leak. I found that my leak was coming from the cover of the pump itself. After using the guidance of one clever forum member on Bimmerboard, I bought some special sealant named Hylomar and removed the cover via the 5 or 6 small torx bolts. There is a 2nd o-ring on the vac pump that is not available separately from the dealer. This o-ring for the cover gets flattened over time. I just lightly applied the sealant to both surfaces and let sit a few mins before reassembly.

It's been several days and I'm leak free! What's cool is that the cover plate can be removed without removing the entire vac pump.

Hope this helps someone...
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  #2  
Old 01-19-2012, 11:49 PM
coole65i coole65i is offline
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BMP design sells the gaskets (both the gasket for the block and the cover) for the E60/E65 vacuum pumps. I bought the kit and replaced them both on my E60 545i.
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  #3  
Old 01-20-2012, 09:15 AM
dablk1 dablk1 is offline
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Good info.
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  #4  
Old 01-20-2012, 11:02 AM
the fly the fly is offline
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Quote:
Originally Posted by coole65i View Post
BMP design sells the gaskets (both the gasket for the block and the cover) for the E60/E65 vacuum pumps. I bought the kit and replaced them both on my E60 545i.
Any you didn't tell me beforehand!?!? That looks like a good option too. I didn't thing anyone sold the cover o-ring separately.
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  #5  
Old 02-21-2012, 03:57 PM
jbhoot jbhoot is offline
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Quote:
Originally Posted by the fly View Post
Any you didn't tell me beforehand!?!? That looks like a good option too. I didn't thing anyone sold the cover o-ring separately.
I just found out I have the same problem. I ordered the o-rings from BMP. How difficult was it to remove the vacuum pump? Do you have any good tips to make it easier? I think I'll write up a DIY after I get this done.
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  #6  
Old 02-22-2012, 06:44 PM
the fly the fly is offline
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It's not too hard. There are DIYs already out there. BMW uses a vac pump like this on several other v8s. Search for "vacuum pump diy".

The only potentially tricky part is lining up the blade that drives the pump. It fits into a groove on the end of the camshaft. If you get lucky, the groove is already close to vertical and the blade fits in easily. If not, it flops to the side and won't go in. You need to get a big socket for the crank pulley to rotate the engine (clockwise) until the groove is vertical.
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  #7  
Old 02-24-2012, 01:37 PM
jbhoot jbhoot is offline
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Thank you 'fly'. I get the new o-rings next week and will attempt next weekend.
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  #8  
Old 04-29-2012, 05:42 PM
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Rookie2008 Rookie2008 is offline
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Can anyone post link to where this can be purchased please?
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  #9  
Old 04-29-2012, 06:01 PM
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Rookie2008 Rookie2008 is offline
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Is this the correct part # Part Number: 305162
Manufacturer Number: 11 66 7 545 384


http://www.bmpdesign.com/product-exe...earch_model/93
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  #10  
Old 04-29-2012, 08:06 PM
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Pdux72 Pdux72 is offline
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Hey fly can you post a link to a DIY. That would be a helpful link. Especially since this was something the stealership said they noticed when tjey did my oil change. Their comment was we noticed a leak at your vacuum pump. We diagnose this for $120 and repair it for $750..
I was like why do you need $120 to diagnose and then $750 if you javent diagnosed it yet. They already knew what the issue was...idiots. just looking for more $$$$$...
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  #11  
Old 04-30-2012, 08:31 AM
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Here I found a DIY http://tis.spaghetticoder.org/s/view.pl?1/07/45/33
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  #12  
Old 04-30-2012, 07:28 PM
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Well I just changed my oil pressure switch and that thing had oil coming all out of it. I will see over the next 2 days if I see any leaks then I will remove the vacuum pump an replace the O rings to see if that's leaking also.
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  #13  
Old 04-30-2012, 07:48 PM
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Very cool! Thanks Rookie

Sent from my EVO using Bimmer App
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  #14  
Old 04-30-2012, 07:49 PM
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Anytime
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  #15  
Old 08-11-2013, 06:33 AM
BESTGEAR BESTGEAR is offline
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Hi Guys

Does anyone know the dimensions of the cover oring?

I tried the oil filter oring from a N46 - that others have had success with - and its too small for my 645.

No one in the Uk seems to know what they are or stock them.

Thanks

David
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  #16  
Old 12-04-2013, 11:26 AM
Rohit28 Rohit28 is offline
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Hey Guys I seem to have a leak aroung the vacuum pump also.
Can anyone tell me how this pump actually works ?

Thanks.
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  #17  
Old 12-04-2013, 03:32 PM
the fly the fly is offline
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Mein Auto: '06 750i, '01 M3 vert
It basically draws a vacuum by utilizing a constantly changing volume. That effective volume changes as the rotor rotates and slides.

You can probably find pressure pumps used in the real world (albeit MUCH larger) by the name of sliding vane rotary pumps.
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  #18  
Old 12-04-2013, 08:42 PM
bimmertech113 bimmertech113 is offline
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vacuum pump leak repair -- success!

EDIT =

you can not advertise your service if you are not a site sponsor ...

Last edited by PAPER; 12-04-2013 at 09:06 PM.
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