Scion xB 06 rattling noise at 2000 RPM's? Any throughts?

[drmonkey1313]

Hi everyone,

I have an 06 xB and notice that when the RPM's hit exactly 2000, there is a rattling noise that sounds like it is from the transmission. Not sure where it is coming from. All I can say is that it rattles at exactly 2000 RPM's. Once I go above or below 2000 RPM's the noise stops.

Anyone else having this issue? Anyone have thoughts about this?

Thanks in advance for your help with this.

[vintage42]

Originally Posted by drmonkey1313

... 06 xB and notice that when the RPM's hit exactly 2000, there is a rattling noise that sounds like it is from the transmission....

The xB has a low resonance at 2000 rpm. It is a nice sound in the summer with all the windows down (and my sunroof open), and I use it as an economical upshift point, so I am very familiar with it. However, if there is anything loose in the exhaust system or heat shielding, or anything touching it, it could be the cause of your 2000 rpm rattle. For that matter, it could be anything else that is loose on the engine or touching it, like the air cleaner or a hose.
Scion xB

[drmonkey1313]

So, you know what sound I am speaking of then? If so, then I should not worry because this appears to be normal, correct?

Thanks for your help.

[vintage42]

I do not know the rattle that you speak of. I don't know what it sounds like, or what is causing it. It cannot be normal, so have your dealer check it out.

[Box Rod]

The only rattle that I have had was with the exhaust heat shields under the xB. A few bends here and there to the heat shields and no more rattles.

NOTE: I didn't "move" the heat shields, just bent them so that they don't rattle against the unibody or the exhaust.

[chad1.5litertoaster]

^^^ I would point to heat shields as well. They are thin sheet metal and can easily become tweaked by getting hit by road debris.

I would either remove them or play around with bending them until your rattle goes away.