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2011 Kia Optima
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4,201 Posts
My first question would be, how did the car run before the engine was replaced?
Sure it's the turbo and not a leak in the intake system or wastegate adjustment, any CEL?
First link I came upon:
 

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Registered
2011 Kia Optima
Joined
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4,201 Posts
Well, my thoughts are, if it ran fine before the replacement, but had problems after, the turbo didn't decide to take a dump at that time. Now, if the motor seized and happened to throw pieces of metal into the turbo, that's another story, but if that was the case, the turbo should have been replaced with the engine, compliments of Kia.

If you're talented enough to replace a turbo, take some time and check the waste gate voltage when cold 3.9/4.0 volts, then the intake system for any leaks. Look at all connections to see if they are tight, check intercooler for leaks, and turbo hose connection under the car.

Unusual in that the receipt doesn't indicate that the wg voltage was checked, There are a million videos on how to check the wg voltage, but regardless of what is said in the video, set it 3.9/4.1 max volts cold, engine not running. Use test wiring into the connection or a torque app, and to adjust, some remove the small clip, maybe purchase another just to be certain you'll have an extra incase it's dropped, and some disconnect the opposite end so as not to have any problems with the clip.

Take time to do your own inspection before replacing the turbo.
 
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