What is that tappet noise when Im accelerating hard?
Peugeots exhaust manifold design is a set of 4 pipes located in a common exhaust manifold, and the strange tappet noise sounds like a common case of the exhaust manifold pipes rattling in that manifold. This is a reasonably common occurrence on the GTi (at least up until the 03 model), and requires that the manifold be removed and a few tack welds put in place to cure the noise. Originally Peugeot insisted that the manifold be replaced, only for the problem to eventually reoccur. These days it is a simple case of removing the manifold and applying a few well-placed tack welds, all done at your friendly Peugeot Service place. You can read a little about the procedure here: Noise on acceleration A few people on the list have had this done, but its usually under warranty so I have no idea how much a dealer would charge for this.
