High pitch noise on my Tacoma 2007

[Bertflyingman]

When I start may Tacoma 2007 in a cold temperature, the engine has a very high pitch noise that sounds like a whisle.
I think it has something to do with vacuum ?

When the engine has warmed up the noise desepears.

Thanks

 

[kennythewelder]

Sorry for the slow response. Without being able to hear the noise, it is very hard to say what it is. If the engine is running good while it is making this noise, it could be a simple as the fan belt. When the engine is cold, you could remove the fan belt, and see if the noise goes away. If so, then you know its the belt, or related to the belt, and what it drives. If not, then you it isnt the belt, or related to the belt.