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Halm Halm is offline
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Join Date: Jan 2002
Location: VA
Posts: 3,389
New Variation on Old Question

General topic is "What do I have, Nikasil or Alusil?" After doing some research, it seems the best test discussed is to use a magnet on the inner surface. If it shows magnetic properties, it's Nikasil.

What about checking the piston top with a bore scope? It seems to me that if the piston has a deep relief pockets for the valves, then the cylinders are Nikasil. If the piston is low domed with shallow pockets, then designed for CIS and probably Alusil.

Or were there enough 2.7 / 3.0 CIS cars made with Nikasils that this doesn't work?
'01 Boxster S
'04 996 Anniversary
'80 SC "Measles" (Sold)
Old 09-01-2004, 03:41 PM
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