Rythmic noise at idle - Absent with belt removed - Fixed!
Posted: Thu May 02, 2024 9:23 am
Hi,
I was wondering if I could pick collective brains. As part of the rolling restoration on my Coupe I'm having a bit of trouble working out what is causing a noise when the engine is idling.
When started it makes a rhythmic sort of 'chirp' (not squeal) that goes away when the revs I raised. You don't notice it when driving, just idling. Even my daughter asked what the noise was! (Makes no difference if ac is on or off)
It sound like ancillary belt or something in that area so I removed the belt and ran it again - no noise.
I checked the alternator and that was quiet, I checked the ac pulley and that seemed quiet so I've changed the tensioner and fitted a new belt but the exact same noise is still present.
Using a mechanics stethoscope didn't seem to pin point it either. I'll try and get a recording.
Does anyone have any other ideas please?
Thanks,
Andy.
I was wondering if I could pick collective brains. As part of the rolling restoration on my Coupe I'm having a bit of trouble working out what is causing a noise when the engine is idling.
When started it makes a rhythmic sort of 'chirp' (not squeal) that goes away when the revs I raised. You don't notice it when driving, just idling. Even my daughter asked what the noise was! (Makes no difference if ac is on or off)
It sound like ancillary belt or something in that area so I removed the belt and ran it again - no noise.
I checked the alternator and that was quiet, I checked the ac pulley and that seemed quiet so I've changed the tensioner and fitted a new belt but the exact same noise is still present.
Using a mechanics stethoscope didn't seem to pin point it either. I'll try and get a recording.
Does anyone have any other ideas please?
Thanks,
Andy.