I got my car back yesterday after having a new chain tensioner piston fitted to *presumably* rectify my engine rattle from cold. My car's engine was still warm and had recently been moved when i collected it so the noise did not occur. Started it today..........same noise, absolutely no difference whatsoever. I really dont know what to do

With regards to msh441's comments on hearing nothing out of the ordinary compare the two vids below, one is when it starts ok without any abnormal noise the other is not.
What these short clips cannot convey is how loud the knocking/tapping is, its really alarming!
Enginebehaving.flv - Video - Photobucket - Video and Image Hosting Coldstart.flv - Video - Photobucket - Video and Image Hosting
CB