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JK McDonald JK McDonald is offline
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Join Date: Oct 2003
Location: Texas
Posts: 921
Nikasil Cylinders -

Hey Rufrob - It is never a good sign to open up the water pump cavity to find it's impeller broken into pieces. A serious high temp cycle can cause all sorts of problems for an aluminum 928 engine. The problem now is to assess the usable status of everything. Especially whether the unsleeved, silicon alloy engine block can be saved. I've read about a special process to over bore and re-etch the Nikasil cylinders to bring the silicon crystals back out as a wear surface again. There are much more experienced engine builders here that can probably make some recommendations to help you decide on your options at this point.

Good Luck, Michael
1984 928S - "Miss Purdy"
1987 911SC - "Frau Helga"
1986 930 - "Well Hung"
1975 911 Targa "Blue Who"
2006 Audi A6 Quattro "Howdy Audi"
Old 09-17-2018, 07:14 PM
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