2.2 D4D - "pulsing" Noise?

[pinkwindmill]

Hi all,

Picked up a 2009 Avensis Tourer in December, from a main dealer. It's got the 2.2 D4D engine, with about 50k on the clock.

I have to say I'm loving car - quite different from my Aygo...!

It drives very smoothly, but I've noticed that there is a faint "pulsing" sound in-between about 1200 and 2000 revs. It seems to go off when the revs get higher, but that may be more that I can't hear it over other road noise. It is not audible at tick-over, nor apparent when driving off from cold.

There's no noticeable smoke, or low fuel consumption.

I'm under an Approved Used warranty (well, the car is!) but, before I go through the hassle of getting it booked in for a check over, I wondered if this was just a feature of this engine?

Any thoughts would be most welcome.

Many thanks,

PW