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2004 745li. The car runs great but at 500 rpm in gear it…

2004 745li. The car runs...
2004 745li. The car runs great but at 500 rpm in gear it sounds like a windows*****dear where the vanos is located. Is this the vamps making noise? Worn out solenoids? I did put new seals on the solenoids and cleaned it the gunk. The noise only activates when the car is put in gear otherwise the car runs great. It's pretty loud too.
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Customer reply replied 11 months ago
Vanos *
Customer reply replied 11 months ago
https://m.youtube.com/watch?v=jNUeyIhWVhc I found a video that sounds like the same noise
Customer reply replied 11 months ago
When I put the car in park the noise goes away
Customer reply replied 11 months ago
It seems maybe coming from the vacuum pump. Bad vacuum pump maybe?
Answered in 14 hours by:
10/14/2017
Matt
Matt, Engineer
Category: BMW
Satisfied Customers: 23,609
Experience: Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
Verified

hello

listening to that video I'd agree that it sounds like the VANOS pulley may be moving about more than it should

I'd suggest to drain the oil, replace the filter and re-fill with fresh as the 1st step as the VANOS system is susceptible to clogged oilways and sticking as a result

if its been like this for a while then you may need to replace the pulley with new

Matt
Matt, Engineer
Category: BMW
Satisfied Customers: 23,609
Experience: Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
Verified
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