Help diagnosing rhythmic whirring sound
Discussion
I've had an annoying rythmic whirring/pulsing sound emitting from the engine bay for quite some time now but it's now starting to grind my gears (not literally). It can be heard from idle and the the frequency increases with RPM, at idle it can be heard probably two or three times per second. This is s
t enough but when driving I find myself tuning in to the sound and when accelerating it ruins the sound of the engine completely and thus what should be an event turns into a struggle to maintain my sanity. Initial thoughts were aux belt, the pulleys seem to be running true but there is a very slight lateral movement in the belt as it rotates. I have also been over the engine bay with a screwdriver to listen for sounds and potentially the suspect could be the alternator. Unless I am beyond help and have gone mental, the sound I can hear when pressing the screwdriver on the alternator appears to match the rhythm. Can alternators make a pulsing/rhythmic sound? I thought when shot they would generally just sound like a bag of spanners in a washing machine rather than being rhythmic
Here's a short clip, hopefully you can make out the sound, sorry for cack quality
http://youtu.be/ntT39sjqO6Y
t enough but when driving I find myself tuning in to the sound and when accelerating it ruins the sound of the engine completely and thus what should be an event turns into a struggle to maintain my sanity. Initial thoughts were aux belt, the pulleys seem to be running true but there is a very slight lateral movement in the belt as it rotates. I have also been over the engine bay with a screwdriver to listen for sounds and potentially the suspect could be the alternator. Unless I am beyond help and have gone mental, the sound I can hear when pressing the screwdriver on the alternator appears to match the rhythm. Can alternators make a pulsing/rhythmic sound? I thought when shot they would generally just sound like a bag of spanners in a washing machine rather than being rhythmic Here's a short clip, hopefully you can make out the sound, sorry for cack quality
http://youtu.be/ntT39sjqO6Y
Doodlebug87 said:
when accelerating it ruins the sound of the engine completely and thus what should be an event turns into a struggle to maintain my sanity.
http://youtu.be/ntT39sjqO6Y
Must be the Aygo.http://youtu.be/ntT39sjqO6Y
Oh bks what a kerfuffle, I have somehow misplaced a supercharged K20 and replaced it with a 1.0 VVTi without actually realising until now. I thought I was in Vtec but unbeknown to me it turns out I left an open socket set under the cam cover. Someone is having a blast in the worlds most mental Aygo while I'm left with this. Regardless of this situation I still have a fking stupid noise I'd like to eradicate!
ks what a kerfuffle, I have somehow misplaced a supercharged K20 and replaced it with a 1.0 VVTi without actually realising until now. I thought I was in Vtec but unbeknown to me it turns out I left an open socket set under the cam cover. Someone is having a blast in the worlds most mental Aygo while I'm left with this. Regardless of this situation I still have a fking stupid noise I'd like to eradicate!Doodlebug87 said:
Oh bks what a kerfuffle, I have somehow misplaced a supercharged K20 and replaced it with a 1.0 VVTi without actually realising until now. I thought I was in Vtec but unbeknown to me it turns out I left an open socket set under the cam cover. Someone is having a blast in the worlds most mental Aygo while I'm left with this. Regardless of this situation I still have a fking stupid noise I'd like to eradicate!
Fix this first:ks what a kerfuffle, I have somehow misplaced a supercharged K20 and replaced it with a 1.0 VVTi without actually realising until now. I thought I was in Vtec but unbeknown to me it turns out I left an open socket set under the cam cover. Someone is having a blast in the worlds most mental Aygo while I'm left with this. Regardless of this situation I still have a fking stupid noise I'd like to eradicate!
No immigrants from what I could see and no nuts in the airbox, although I've noticed that whoever changed the crank pulley has replaced it with a wagon wheel. The issue with this is they are much smaller than they used to be so everything is under spinning.
Right, video updated, my fault for being a burke and setting it as private- http://youtu.be/ntT39sjqO6Y
Any thoughts?
Right, video updated, my fault for being a burke and setting it as private- http://youtu.be/ntT39sjqO6Y
Any thoughts?
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