Any insight would be appreciated. My 2008 Gen 4 3,2DID has 115K km 3 months ago it developed an engine noise. Here goes as best I can explain it, slightly worse when cold, around 2000rpm there is among the usual cricket noise a sharp extra click like a stone hitting the body of the car, it is intermittent but can be induced occasionally by dropping rpm to 1000 and then accelerating back to 2000 rpm.
Fuel consumption is a little high imo but always has been 12l/100km on open road at 110kmh. EGR valve replaced a few weeks ago due to engine management light. I have had car at agents and another reputable service agent both have done the electronic diagnostics and say all is 100%. Sadly all ok doesn't explain an unusual noise. Any advice about an approach to this problem would be appreciated.
