engine knock

Hi i recently purchased a 2011 caliber mainstreet 2.0 with 130,000 miles on it. A few days ago i noticed what sounds like an upper engine knock at startup but litterally stops within a min. The car does sit for a few days in between use 4-6 days usually. It has only happened on a cold start...

I'm new to this site and I'm using it on my phone so I have no clue if I am posting this right because my phone is running so slow but... I have a 2007 Dodge caliber * w. about 120,000 miles.... about a month ago I drove somewhere that is about 15 miles away from my house... once I got to my...