Possible turbo problem

[daemontrym]

I bought a 2012 Sonic LT about 5 months ago and haven't had any issues till now. I currently have 39k on the car and replaced the battery, sparkplugs (Denso IK22), and changed the oil (castrol syntec 5w30 Dexos 1). After changing the oil I now have a whistling noise that is constant until I rev it up. The car is not triggering a CEL and is not running rough or anything. The sound is coming from the front of the engine and a very slight rev gets rid of it then comes back once it idles.

It sounds just like this if you scroll down and listen to the video they post.

Turbo problem - Page 6

 

[Natesriv]

I'm not sure our turbos are even spinning at idle.

 

[NewZJ]

Check for oil in the turbo inlet where the air cleaner assembly connects. You can also pull the charge pipe off the bottom of the turbo to see if anything drips out. It'll run without the charge pipe connected to the bottom of the turbo (I did it accidentally before) and see if the noise changes.

 

[ahtoxa]

Is the whistle coming from the plastic engine cover area? If so, take it off while the motor is running and put your finger over the little vent/nipple. Do you feel the air leak plug and whistling stop? If so, you have either of the two things - a blown PCV or a cracked valvecover.

 

[rdss]

Welcome to the forum. Please get your ten posts in the link below, the new member section is not for technical questions. Get your ten and then post your question in the appropriate section please.

http://www.sonicownersforum.com/for...-members-please-sp@m-your-ten-posts-here.html