Let me set the scene ... accelerating in 2nd gear, upward incline in the road, as the tacho passes 3500rpm ... clickity-clack clickity-clack from the engine ... change to 3rd ... noise stops. My Euro does this every now and then, but not consistantly ... when it does happen though, it's nearly always in 2nd gear, on an uphill run and when the revs get to about 3500 rpm and above.

OK for those of you who remember ... its sounds very much the same as the old cam-in-block engines with poor/dirty hydraulic valve lifters or push rods / valve stem / valve spring distortion noises when under load with a worn engine.

My Euro has only 5300km on the clock, so I'm ruling out the worn engine. I've not had a car that 'pinged' before so I'm only guessing it might be that. I've only used Caltex Vortex 95 RON since new.

Anyone know what it might be? Thanks