I lost miles of nerves till I found this:Symptoms: Tapping, knocking or rattling noise that appears to be comming from the engine at acceleration.
Usualy the noise can be recreated by short bursts of free reving accelerations. Often the noise can be reminiscent of a valve tapping noise.
Possible Cause: Loose pipes inside the exhaust manifold.
Solution: Up to date the faulty manifolds were replaced with new ones. A new directive issued by Peugeot requires workshops to weld the loose pipes.
To determine if a manifold if faulty it is necessary to remove the engine pipe. A screwdriver can be used to lever against the individual pipes. If it is possible to move any of the pipes then it is highly likely that the manifold is the cause for the vibration or knocking noise.
