Turbo sound

[aeo]

The turbo sound on my truck has changed since the last time I drove it.

It's cold out- not Arctic Circle cold. Can air temp affect the sound? It's just when it's boosting (is that a real word??) and it has a different whine.

No other kind of turbo symptoms- no loss of power, no smoke changes.

Thoughts? I'm paranoid this truck is going to implode on itself. Again.

 

[hillstrubl]

Check oil level?

 

[javelinadave]

Colder air is denser than warmer air and yes it could sound differently.

 

[aeo]

Check oil level?

Like in the truck? It's due for an oil change from the new motor install. And this is a VNT turbo that was new. There is a history here of issues with said motor. But the turbo has been fine. Just noticed the pitch change today.

 

[hillstrubl]

Like in the truck?

engine oil, its a hail mary but maybe its being under lubricated

 

[JimC]

Did your intake hose pop off or come apart anywhere?

 

[rocky]

Yup check the entire inlet system for loose clamps. Also do you have a blow off valve? Has that seized even slightly open?

 

[Z.G]

Yup check the entire inlet system for loose clamps. Also do you have a blow off valve? Has that seized even slightly open?

A blow off valve? On a tdi?

 

[expanse]

A blow off valve? On a tdi?

Paging Mr. Bubb Rubb, Paging Mr. Bubb Rubb,

 

[WreckITFrank]

back in the day people used to pay my shop to make it louder...I noticed the same after a recent trip in mine, around 32 degrees seemed to spool louder. Ironically, @JimC was right on as near the end of the trip the upper IC hose blew off and i nearly sharted. Check hoses, and but if in colder temps might be as Dave suggested.