Cleaning Parts?

Getting ready to put the new motor and tranny together and in the car.

I was going to install the turbo intake piping, but I noticed the inside of the tube has a light coat of oil. Same thing on the inside of the intake manifolds. On the lower intake manifold, the ports have varying amounts of oil coating. I thought it would be a good idea to clean them up, so I had my mechanic use his parts washer. It cleaned up the outsides of the manifold but he said I need them steam cleaned to clean the actual intake ports.

Is this normal for pcv valve equipped engine? Will this affect anything, or is it only visual? If it is a good idea to do it while engine is out, what kind of shop would have a steam cleaner? I called the radiator shop thinking that was a good bet, but they don't have one…