Not sure if this is one I should be concerned about yet, but always nice to get a few opinions.
When starting the car from cold, I get a tapping noise from the timing belt area, it lasts about 2.5-3 mins then disappears. I've checked various heat shields and manifolds, all appear tight, though it's the kind of sound a loose one would make. Engine was rebuilt at 63K 2.5 years ago (79K now). Rebuild due to aux belt failure, so all belts replaced at the time. Previous owner thankfully!
The noise seems loudest at the highest point the belt cover protrudes into the engine bay, but could be coming from somewhere lower and travelling up. Am I right in thinking the oil pump is down and behind the belt cover? could the oil pump be on its way out and struggling until there is some heat in the system, i.e. the first 2-3 mins? Would an oil pump make any kind of clatter when cold? What about the water pump?
I replaced the top engine mount last week as it was fairly worn, just in case it was the engine rocking when cold, but the noise remains exactly the same.
Or should I just be a bit more paranoid and start saving for a belt change?