Since it'* gotten cold out I've noticed something pretty disturbing on my 05 3.6 CTS. When the engine is started blow freezing there is a very loud chatter like an oil-starved engine would make. This is the first car that I have EVER had that has made this type of noise. It makes me pretty uneasy on a 2 year old car with less than 70,000 miles! This is my 4th car, and the 1st to do it.
I took a video to help in figuring the problem out. Thanks!
Below freezing? You think the temperature differential is creating a size difference that causes rubbing? Also, certain oils are for different temperatures, so the oil may be out of an efficient temperature range.
I dunno, I'm a noob but I just want to contribute.
It doesn't seem to have any kind of miss to it. It idles really smooth. Just for the record, I'm running Mobil 1 5W30 as Cadillac recommends so I'm stumped. Oil level is also normal. I'd check oil pressure, but the 3.6 doesn't come with an oil pressure sensor even.