I can't speak to 94Boosted posted but the cold start rattle is a symptom of the timing chain stretching and slapping against the side of the case. This will eventually cause you to wear through the case, damage the chain, and cause a pile of timing issues if left unattended. I don't know how long any of that takes but once you hear that horrible rattle noise you know its pretty bad.This quote is hidden because you are ignoring this member. Show Quote