Originally Posted by Spooler

It can be done. I have done it. Without a picture it is hard to give any advice. Pulling the valve covers and doing a massive cleaning is one thing you can do. You have to be very very careful if you go that route. Another thing to do is to inspect the oil pickup tube. I would also use a can of Engine Kleen through it at idle. It is basically Kerosene. After that I would change the oil/filter again and add a can of BG MOA to the oil. I would do this every oil change for a while. A guy did a video on what to do on Youtube. It was very accurate on what needs to be done, step by step.