This afternoon I started my 5 day old TSX and it sounded kind of funny to me. Its a little warmer so I cant blame cold weather. Basically, as I accelerated, it just kind of whined loud enough for me to notice. It kind of went away (but not completely) as the day went on. Any ideas?

 

That's the turbocharger warming up.

 

Okay.. all kidding aside, it's normal. I think it's balancer shaft whine personall since it comes and goes with RPM. It should go away after it warms.

 

Hmmm, ok. What does that do?

 

4 cylinder engines larger than 2.0L have some vibrations. Balancer shafts have little weights on them and spin in the opposite direction and twice the rpm of the motor. They counter act the vibration forces making the engine run smooth.

 

didnt know that...cool stuff

 

I think in the TSX there's one that does 2x rpm, and another at 3x rpm to damp out 2nd order and 3rd order harmonics.

 

Not that its not already pointed out but it's normal. Mine does the same on cold mornings until its warmed up.

 

if you are taking about the same whine I am thinking of, I love it

 

I have that whining sound as well, and even asked the dealer about it. Supposedly its just he air intake and is quite normal. There have been threads on this subject if you want to try a search.