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alborz · 03-08-2018, **(Subject: Turbo sounds )**

Is that normal that turbo sound sometimes?
Specially when the 9outside temperature is cold?[/b]

Chamberpains · 03-08-2018, **(Subject: Turbo sounds )**

Sounds like what?
My turbo sounds the same no matter what the ambient temp is. Its a CM870 air controlled HE551V

alborz · 03-08-2018, **(Subject: Turbo sounds )**

It sounds like it spins at high speed. It is like that for short time . Maybe a minute then the sound goes away.

Rawze · 03-08-2018, **(Subject: Turbo sounds )**

Maybe a boost leak?

Nilao · 03-08-2018, **(Subject: Turbo sounds )**

If the truck is mandated the turbo closes for egr purposes as well as faster warm up. That will cause the turbo to spool up and sound like a jet engine sometimes lol

JHNDZ · 03-08-2018, **(Subject: Turbo sounds )**

I've wondered the same thing .. how long is it supposed to spool like that ..? If it's trying to warm up until what temp should it stop ??
I feel like my truck is spooling all the time

Chamberpains · 03-08-2018, **(Subject: Turbo sounds )**

Mine does it a lot on flat ground and when going down a hill. If it's not in warm up mode, I always figured it was spooling up in preparation for when the accelerator is used next. But I have no idea why it does it. Nor has it ever really bothered me.

alborz · 03-15-2018, **(Subject: Turbo sounds )**

OMG
Now the turbo sounds like screaming
It makes me panic and gives heart attck

Nilao · 03-15-2018, **(Subject: Turbo sounds )**

Mine has squealed for a while now. Usually if it hits 700 degrees and the boost goes over 25 psi. With almost 350k miles since I bought the truck and unknown mileage before I think it is just getting tired.