The water nipple on the cylinder head is not good. I don't want to touch it if it's a chance to destroy something. What do you think? Image Unavailable, Please Login
First clean it up gently and measure how thick the wall is. Use a knife gently and remove all the alu oxide. /Patrik
I would use a dental tool...slowly clean it OUT..being careful none of that gunk goes "in".. You may be able to get a dental tool at a "tool store"...that is where I got mine.. It's generally good for such applications & the tool is nice & small for this.
The problem is outside of the nipple. It start disappearing. It's better to see in this picture. Image Unavailable, Please Login
I would do what Mark said with a vacuum running next to the nipple to make sure nothing goes in. Gene