Need help diagnosing problem....
Sitting at traffic lights this afternoon I could hear an unusual noise coming from the engine bay. I pulled over and popped the bonnet. There is a metallic grinding noise (like a dry bearing) coming from the timing belt side of the engine. The noise changes in relation to engine speed. Got back in and drove home slowly.
I'm thinking it's either the water pump, the alternator or the PAS pump. Agree / disagree???
As I don't have a garage + tools,etc at mine I'm heading round to my parents in about an hour to check it out. What should I be testing or looking for?
My plan is to remove the auxiliary drive belt and start the car. This should hopefully eliminate or confirm if it's the water pump that's at fault.
There are no warning lights illuminated on the dash. Timing belt last changed 25K miles ago. Nothing has been touched on the engine since.
Any ideas or suggestions much appreciated