Hey people, I've got this bizarre noise when I drive the car first thing in the morning,or when stone cold. The car sounds completely normal when it starts, when you accelerate slowly to about 10kph, at 10 kph it makes a loud clak type noise followed by knocking for about 2 seconds. The noise only happens when you first drive it and wont do it again once warm. When it was under warranty, the tech said the clak noise it was normal and had something to do with the emission controls but now the knock noise has developed as well. Has anyone else experienced this noise or know what it may be. the cars a BF Auto. Cheers