R56 Buzz at 2000 rpm after timing chain replacement
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1st Gear
Joined: Oct 2012
Posts: 18
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Buzz at 2000 rpm after timing chain replacement
I just replaced the timing chain on my 2009 cooper s hatch back (for the second time in 4 years). The old chain felt tight but the timing was WAY off (cam shafts were almost 90 degrees off), not sure how (maybe the crank shaft bolt was slipping?) Needless to say it was barely driveable. Well, not really driveable at all but it would limp around a little.
Now it runs great EXCEPT there is a buzzing sound between 2000 and 2400 RPM, only when accelerating. It does not happen if I am parked, only when I am driving. It is hard to say exactly since I cannot produce the noise when parked and people look at me funny when I have my son drive me around while I am sitting on the engine, but it does seem like the sound is coming from the drivers side of the engine bay. I rechecked under the hood and do not see anything obvious that is loose and could be vibrating
Any thoughts? Did I not get the timing quite right when putting in the new chain (I have the cam shaft tool but not the “pretensioning” tool so I just put the new tensioner in finger tight before torquing everything down)? Is the VANOS shot? Something else?
Thanks in advance for your opinions!
Now it runs great EXCEPT there is a buzzing sound between 2000 and 2400 RPM, only when accelerating. It does not happen if I am parked, only when I am driving. It is hard to say exactly since I cannot produce the noise when parked and people look at me funny when I have my son drive me around while I am sitting on the engine, but it does seem like the sound is coming from the drivers side of the engine bay. I rechecked under the hood and do not see anything obvious that is loose and could be vibrating
Any thoughts? Did I not get the timing quite right when putting in the new chain (I have the cam shaft tool but not the “pretensioning” tool so I just put the new tensioner in finger tight before torquing everything down)? Is the VANOS shot? Something else?
Thanks in advance for your opinions!
the easiest thing to do, is recheck the timing to scratch that from the list.
is the buzzing more like electrical buzzing or mechanical buzzing? attaching a video or audio will help is more to identify it.
btw, i bought a car with 180 deg off and was running rough with all kinds of lights on the dash...I love minis...lol
is the buzzing more like electrical buzzing or mechanical buzzing? attaching a video or audio will help is more to identify it.
btw, i bought a car with 180 deg off and was running rough with all kinds of lights on the dash...I love minis...lol
2nd Gear
Joined: Feb 2018
Posts: 134
Likes: 16
From: DFW
I just replaced the timing chain on my 2009 cooper s hatch back (for the second time in 4 years). The old chain felt tight but the timing was WAY off (cam shafts were almost 90 degrees off), not sure how (maybe the crank shaft bolt was slipping?) Needless to say it was barely driveable. Well, not really driveable at all but it would limp around a little.
Now it runs great EXCEPT there is a buzzing sound between 2000 and 2400 RPM, only when accelerating. It does not happen if I am parked, only when I am driving. It is hard to say exactly since I cannot produce the noise when parked and people look at me funny when I have my son drive me around while I am sitting on the engine, but it does seem like the sound is coming from the drivers side of the engine bay. I rechecked under the hood and do not see anything obvious that is loose and could be vibrating
Any thoughts? Did I not get the timing quite right when putting in the new chain (I have the cam shaft tool but not the “pretensioning” tool so I just put the new tensioner in finger tight before torquing everything down)? Is the VANOS shot? Something else?
Thanks in advance for your opinions!
Now it runs great EXCEPT there is a buzzing sound between 2000 and 2400 RPM, only when accelerating. It does not happen if I am parked, only when I am driving. It is hard to say exactly since I cannot produce the noise when parked and people look at me funny when I have my son drive me around while I am sitting on the engine, but it does seem like the sound is coming from the drivers side of the engine bay. I rechecked under the hood and do not see anything obvious that is loose and could be vibrating
Any thoughts? Did I not get the timing quite right when putting in the new chain (I have the cam shaft tool but not the “pretensioning” tool so I just put the new tensioner in finger tight before torquing everything down)? Is the VANOS shot? Something else?
Thanks in advance for your opinions!
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