RE .. engine noise E90

aussie 64 · 11-13-2010, 07:16 PM

Well guys more reports on the engine noise I reported earlier. I had new belt tensioner put in and ......... no difference.

..... I now reckon the noise is coming from the tensioner as when i put a shifter on the nut and apply pressure the vibration stops and so does the noise, but... something else is causing the tensioner to rattle and vibtrate!!

..anyway car is going back to garage this week for further investigation...comment from daughter who has a mazda 2 " what a crap car you been ripped off "

BlockbusterAU · 11-16-2010, 07:48 AM

Quote:

Originally Posted by aussie 64

Well guys more reports on the engine noise I reported earlier. I had new belt tensioner put in and ......... no difference.

..... I now reckon the noise is coming from the tensioner as when i put a shifter on the nut and apply pressure the vibration stops and so does the noise, but... something else is causing the tensioner to rattle and vibtrate!!

..anyway car is going back to garage this week for further investigation...comment from daughter who has a mazda 2 " what a crap car you been ripped off "

I have the same issue with my 2005 E90 320i. Cold start, gear in R or D has rattling/vibration sound. Once you start driving or start it again when it's warm it's gone.

Let me know if you ever get to the bottom of this.

aussie 64 · 11-23-2010, 02:43 AM

well looks like things are getting more clearer here regarding the noise from the tensioner. I had a new belt put in that is from an audi, it is 5mm shorter than the bmw one. The noise has been deadened by approx 85% , My mechanic recons the noise is being caused by vibrations from the air conditioner condenser. next plan is to look at the air con to see if new bearings can be applied as the new one is $1800 new. Also he is looking to isolate the air con from the the tensioner by using two belts instead of the one serpentine so that sounds like a plan....getting to the end now hopefully

aussie 64 · 12-03-2010, 06:31 AM

just another note on e90 320i cold start rattle, my mechanic replaced the a/c compressor on a similar car and niose and rattle went so it looks like it may cost $1800 but I think I will get one from a low km wreck too close to xmas for that kind of money.
phew at last a solution

andrew@southernBM · 12-04-2010, 05:22 AM

So does it still make the noise with the belt off?

If not then i would look at the Alternator, take the belt off, grab the neck of the Alternator pulley and give it a twist, a flick of your wrist, after you flick it, hold the pulley tight and see if you can see the insides of the Alternator moving, if the inside moves, then no issue, if it doesn't move the pulley needs replacing, the front pulley is actually a clutch and drives all the time when it requires replacing and grumbles.

11-13-2010, 07:16 PM	#1
aussie 64 New Member 1 Rep 11 Posts Drives: 320i E90 executive Join Date: Nov 2010 Location: perth australia iTrader: (0)	RE .. engine noise E90 Well guys more reports on the engine noise I reported earlier. I had new belt tensioner put in and ......... no difference...... I now reckon the noise is coming from the tensioner as when i put a shifter on the nut and apply pressure the vibration stops and so does the noise, but... something else is causing the tensioner to rattle and vibtrate!!..anyway car is going back to garage this week for further investigation...comment from daughter who has a mazda 2 " what a crap car you been ripped off "
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11-23-2010, 02:43 AM	#3
aussie 64 New Member 1 Rep 11 Posts Drives: 320i E90 executive Join Date: Nov 2010 Location: perth australia iTrader: (0)	serpantine belt well looks like things are getting more clearer here regarding the noise from the tensioner. I had a new belt put in that is from an audi, it is 5mm shorter than the bmw one. The noise has been deadened by approx 85% , My mechanic recons the noise is being caused by vibrations from the air conditioner condenser. next plan is to look at the air con to see if new bearings can be applied as the new one is $1800 new. Also he is looking to isolate the air con from the the tensioner by using two belts instead of the one serpentine so that sounds like a plan....getting to the end now hopefully
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12-03-2010, 06:31 AM	#4
aussie 64 New Member 1 Rep 11 Posts Drives: 320i E90 executive Join Date: Nov 2010 Location: perth australia iTrader: (0)	just another note on e90 320i cold start rattle, my mechanic replaced the a/c compressor on a similar car and niose and rattle went so it looks like it may cost $1800 but I think I will get one from a low km wreck too close to xmas for that kind of money. phew at last a solution
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12-04-2010, 05:22 AM	#5
andrew@southernBM 171 Rep 1,537 Posts Drives: M2 G87, M4 G82 Join Date: Apr 2008 Location: Melbourne, Australia. iTrader: (0)	So does it still make the noise with the belt off? If not then i would look at the Alternator, take the belt off, grab the neck of the Alternator pulley and give it a twist, a flick of your wrist, after you flick it, hold the pulley tight and see if you can see the insides of the Alternator moving, if the inside moves, then no issue, if it doesn't move the pulley needs replacing, the front pulley is actually a clutch and drives all the time when it requires replacing and grumbles.
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