So I just bought a 2005 WRX with right at 70,000 miles on it and after sitting through a colder night, the engine has a slight knock in it when the engine is under load. The knock occurs for roughly five minutes until the car "warms up" and then it purrs like an angry kitten.
The knock sounds like someone lightly knocking on a door and gets faster as the engine gets faster. Is this a typical scooby occurrence as they just don't like cold weather or am I slowly looking forward to a new engine.
Very paranoid about this.