My Rover 75 starts knocking after about 10 miles, sounds like exhaust is knocking on something but the mechanic who serviced it found nothing. Drove around town and it started again, then drove for 30 mile and not a sound, stopped for 2 minutes and it started again. Mechanic checked the suspension, apparently no problems there.Could the brick inside the catalytic converter be coming loose once it warms up?
Also had 2 new tyres on the front as they were wearing on the outside of both tyres. Had the tracking check and it was perfect 00 tolerance. A tyre expert who happened to be passing said that it was possibly towing to the outside. Why?
Anyone any thoughts on these problems?