Vacuum Pump leaking oil. How common?
#11
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Originally Posted by nikko64' post='1090616' date='Jan 14 2010, 11:48 AM
add me to the list. just took mine in yest after seeing oilf for a week or two...and voila its the vacuum pump...only 60,000 miles on my car
https://5series.net/forums/index.php?showtopic=91920
i havent taken apart mine yet, but it seems like an easy thing to fix.
#12
Guys, I am tackeling this problem right now. I removed my pump last night. The oil leak was pretty bad. I took the cover off to see about sealing it back up. I wouldn't recommend sealing with RTV. That is what I was going to do. But after studying the pump and its operation, I decided against it. There is very little clearance between the oring and the moving piece. I will post pictures of the inside. Its really simple how it works. And yes, the pump is pretty full of oil when it is in operation. Or atlease mine was. There was alot of play in the rotor, almost a 1/16" or a few mm. Basiclly the cam turns a shaft, and a plastic plate slides back in fourth on the elongaed houseing. That would allow oil to most of the other side of the rotor and seep into the vacuum line. Also, the rubber hose was cracked. I am surprised my car braked at all.
BAD pic I know, I drew it at 6 in the morning
BAD pic I know, I drew it at 6 in the morning
#13
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Originally Posted by turboawd' post='1090681' date='Jan 14 2010, 02:28 PM
the op stated in another thread that its just an oring that goes bad on the vacuum cover.
https://5series.net/forums/index.php?showtopic=91920
i havent taken apart mine yet, but it seems like an easy thing to fix.
https://5series.net/forums/index.php?showtopic=91920
i havent taken apart mine yet, but it seems like an easy thing to fix.
out of curiosity..for those of us who had it fixed at the dealer...how much did it cost you? Mine was done under CPO warranty so i cant chime in.
#14
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Originally Posted by nikko64' post='1092377' date='Jan 17 2010, 12:42 PM
out of curiosity..for those of us who had it fixed at the dealer...how much did it cost you? Mine was done under CPO warranty so i cant chime in.
FWIW, it took me about 30 minutes tops changing it, taking my time, and cleaning the surrounding area.
#15
Here is the inside of the pump. This pump has about 88K miles on it. Notices the amount of light showing though. The slider is plastic of some sort and the tips are also plastic. They are pretty honed down.
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Originally Posted by jprovence' post='1092829' date='Jan 18 2010, 10:34 AM
Here is the inside of the pump. This pump has about 88K miles on it. Notices the amount of light showing though. The slider is plastic of some sort and the tips are also plastic. They are pretty honed down.
#17
Originally Posted by turboawd' post='1092884' date='Jan 18 2010, 09:50 AM
Did you replace or repair your pump? Was the oring bad?
Neither yet, I am trying to find a source for the special o-ring. I think its silicone. But the rotor is pretty worn down, so a replacement I think is in order.
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Originally Posted by jprovence' post='1092907' date='Jan 18 2010, 12:20 PM
Neither yet, I am trying to find a source for the special o-ring. I think its silicone. But the rotor is pretty worn down, so a replacement I think is in order.
plus, maybe the rotor expands when warmed up??
i wouldnt be too concerned about the rotor.
#20
Originally Posted by turboawd' post='1093259' date='Jan 18 2010, 10:25 PM
even with that little gap, when that rotor starts spinning fast, it will overcome whatever air leaks by the rotor. you have to think how much volume is around the rotor versus how much actually squeezes by.
plus, maybe the rotor expands when warmed up??
i wouldnt be too concerned about the rotor.
plus, maybe the rotor expands when warmed up??
i wouldnt be too concerned about the rotor.