Hi all,
I've got a mystery whine that has stumped me and mechanics for almost a year. A bit of background, I have a 2014 2.4L Equinox (Flex Fuel) with 181k miles (it was a fleet vehicle prior to our purchase). Despite the mileage it runs very well, I change the oil every 3k miles at minimum and am diligent about all other maintenance.
About 9 months ago, I started hearing a chatter/whine while idling, as soon as I go above ~1k RPM the noise stops. I initially replaced the belt tensioner since the serpentine belt was due anyway, but no change. Using a stethoscope I can hear it clearly on the engine near the coolant hose above the alternator, next to the engine mount bolts. I can't tell if it's resonating from somewhere else, or this is actually the source. The alternator doesn't seem to be the cause, and is putting out the right voltage. It isn't a consistent noise, as you can hear in the video, and isn't synced to RPM.
It's a bit louder when idling on a hill, happens in all weather conditions, and happens whether or not the AC/air is on.
Very recently the car has starting idling a bit rougher, despite an oil change, but I'm not sure if this is related. The video below is a good indicator of what I hear all the time. Any help would be much appreciated!
https://streamable.com/6i5bc
I've got a mystery whine that has stumped me and mechanics for almost a year. A bit of background, I have a 2014 2.4L Equinox (Flex Fuel) with 181k miles (it was a fleet vehicle prior to our purchase). Despite the mileage it runs very well, I change the oil every 3k miles at minimum and am diligent about all other maintenance.
About 9 months ago, I started hearing a chatter/whine while idling, as soon as I go above ~1k RPM the noise stops. I initially replaced the belt tensioner since the serpentine belt was due anyway, but no change. Using a stethoscope I can hear it clearly on the engine near the coolant hose above the alternator, next to the engine mount bolts. I can't tell if it's resonating from somewhere else, or this is actually the source. The alternator doesn't seem to be the cause, and is putting out the right voltage. It isn't a consistent noise, as you can hear in the video, and isn't synced to RPM.
It's a bit louder when idling on a hill, happens in all weather conditions, and happens whether or not the AC/air is on.
Very recently the car has starting idling a bit rougher, despite an oil change, but I'm not sure if this is related. The video below is a good indicator of what I hear all the time. Any help would be much appreciated!
https://streamable.com/6i5bc