I got a good look at the filter in the valve cover filler cap tonight. I must have done a great job of cleaning it 7 years ago. The fibrous material in the cap is a nice silver-gray color with a light coating of oil. I don't remember cleaning it out, funny that I do remember masking it off, sand blasting it and giving it a self etching primer and black final coat.
I found a friend who has a great parts washer, I cleaned a lot of greasy goop off the breather tube and washed it out for about 20 minutes. It looked like it should soak overnight. Now I am cleaning off the oil from the entire underneath of the truck and installing the tube, changing the oil on Saturday morning. I have been using Pennzoil SAE 30 weight, detergent. Manual suggests this grade when temps are above 32 F. Is this a sound choice for this engine?
