Evening, I dont post on here much but follow this forum closely. i Have a stage 2 megane r26 275bhp 360ft lb and i just fort i would share this with you, i don't know if anyone else has experienced this issue before. I started my car up the other afternoon with the radio on drove about 1mile down the road to get some food. On returning to the car started it up and heard a knock from engine. opened the bonnet and there was a nasty noise from the top of the engine sounding like tappets, oil level spot on and car still drove fine with no loss of power or anything. I took the car to work and decided to take the cam cover off. Took the cam cover to find no obvious problems, so i decided to take the head of to check valves and pistons and they are all fine! So i took the sump of and well the chain that runs from the crank shaft to oil pump flapping around like a bag in the wind! Now i havnt had time to take the side of the engine of to revel what should be holding the chain tight i suspect that there should be a tensioner that is broken? can anyone confirm that there is some sort of tensioner that should be holding it tight? Below is a link to sound of my engine and the chain that is loose.