Hello,

There are several reasons why an engine will emit blue smoke.
Engine could have too much oil (overfilled). Clog in cylinder head drain back holes.
Worn valve stem seals. Bad piston rings. It can also have blue to with a plugged crankcase ventilation.
The intake gasket can also cause the blue some in these engines.
Best course of action is to go thru the possible items to find the issue.

Here is a helpful article that goes over all the basics:

https://www.2carpros.com/articles/blue-smoke-from-engines-exhaust

Please let me know of any questions.
Thank you.