[aphaynes]

Originally Posted by BarryGMC

To view some links or images in this forum your post count must be 1 or greater. You currently have 0 posts. Maybe you should introduce yourself with a new topic?

If the blue is worse when you first start it it's probably the valve guide seals. These engines use the same little o rings as Chevy small blocks. Every one is usually hard and cracked. It's kind of a pain but you can change them with the heads on. Good job on the motors manual. Those are handy. Barry

Yep, it is blue when first cranked and fades away fairly quickly while idling. When reving it up black appears.

I wasn't sure how handy that book would be, but it seems to have a lot of good info in there in the GMC section.