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#1
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2011 X5 35d diesel engine noise
I took a video here https://youtu.be/je7jq7FWZYk Any idea what the issue is or where the noise comes from? |
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#2
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The "whirring" noise? Sounds pulley or belt related. Maybe an idler or tensioner pulley? Won't know for sure until you do some diagnosis. You can remove the belt and see if the noise goes away... that's usually the first step.
Or, you could try spraying some WD40 on the belt and pulleys to see if the noise changes tone or goes away completely. You should clean the WD40 off after the test.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) |
#3
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transmission whine?
I've heard that sound when I let a truck sit for months, and the converter lost most of its' already low fluid level (it was sitting at a steep angle).
Here's a YouTube clip of an TSX with a similar sound: https://www.youtube.com/watch?v=4b-IdCIb_D0
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01 BMW X5 E53,3.0i-5L40E, 7/13/01 topas-blau,Leder-grau,"resto-project car" Here: 14 Lexus ES350,3.5L-U660E 09 HHR Panel,2.2L-4T45E 04 Chevy 2500HD,6.0L-4L80E 98 GMC Sierra 1500,5.7L-4L60E Gone: 66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake 08 Cobalt Coupe,2.2L-4T45E 69 & 75 C10s,350c.i.-TH350 86 S10,2.8L-700R4 73 Volvo 142,2.0L-MT4 72 & 73 VW SuperBeetles,1.6l-MT4 64 VW,1.2l-MT4 67 Dodge Monaco 500 2dr ht.,383c.i.-A727 56 Chevy 210 4dr,265c.i.-PGlide |
#4
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Here is what I posted over on Bimmerfest forum:
So it sounds like only happens when revving the engine? Like around 2K rpm? The obvious thought is something to do with the serpentine belt, pulley bearing, or tensioner. To rule some portion of the serpentine belt in or out one would loosen the tensioner, remove the serpentine belt, have it carefully held out of the way while the engine is revved and see if the noise is still there. If it goes away, then I would replace belt, pulley, then tensioner in that order. However, given this is an M57 diesel engine, I would be very suspicious of a broken or loose exhaust manifold stud with leakage of exhaust gas (and hence whistling/whining) at higher rpms. You can use a borescope to check for loose/missing studs/nuts. There are numerous examples of this on various forum postings. The most recent one was on this [sic - Bimmerfest] forum just a few weeks ago. You can read about it here. Be sure to read all the various links in the posting. Lot of good information there. Of course, could be a bad turbo, alternator bearing, ac compressor, etc. But common things are common, and my money is on the exhaust manifold. Good luck. Let us know what you find.
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Stephen 2010 e70 35d- now driven by son #2 2005 e53 3.0 - now driven by son #1 2021 G05 45e PHEV - now driven by me 2008 ML320 CDI - driven by wife |
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