I was really careful while replacing the timing chain but leave open the possibility that something might have gotten introduced into the valve guide area. If there were something introduced could it cause excessive liquid oil to leak into the exhaust and all the way out the tailpipe?

Another thing worth mentioning here is the car seems to run just fine...

How can I check the turbo to determine if it is causing the problem? If I remove it and take it to a shop, are there some simple diagnostic checks they will do?

Thanks!
Billy