dubaiprince:
Hello, This is my first time of posting on this section. I got a toks Toyota Matrix September Last year but I started using it fully in November. I noticed that when start the vehicle, it gives a grinding sound at start up and the sound stops immediately, then after driving for a while I hear a clapping sound like a flat metal plate hitting another flat metal plate around the passenger side of the engine. this clapping sound occurs at interval i.e the sound comes on for a while and goes off for a while and this only occurs when the car's transmission is engaged i.e on D When on P, the engine sounds normal. What could be the cause of the clapping sound? could it be as a result of the engine oil I use (20w50) or a Timing Chain Issue?

Gurus in the house. Kindly Help.