Quote:
Originally Posted by Hog
just a blurb I found.
"The Alusil aluminium alloy is commonly used to make linerless aluminium alloy engine blocks.Alusil, when etched, will expose a very hard silicon precipitate. The silicon surface is porous enough to hold oil, and is an excellent bearing surface. BMW switched from Nikasil-coated cylinder walls to Alusil in 1996 to eliminate the corrosion problems caused through the use of petrol/gasoline containing sulfur." |
The one thing they forget to mention is that only a few machine shops in the USA can properly hone or bore a block.