Car is a 99 Carmy - 2.2L.
Been running great for years but its suddenly started making an odd noise at around 2300 RPM. It sounds like a tinny rattle in the engine that only comes on during 2300 RPM ish above and below it is normal.
Cars a manual if that makes any difference.
Any ideas what it could be? Is it worth getting checked out?
Thanks in advance guys