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-   -   Case Through Bolt Washers (http://forums.pelicanparts.com/911-engine-rebuilding-forum/1152409-case-through-bolt-washers.html)

dennisv 12-19-2023 07:57 PM

Case Through Bolt Washers
 
Are these correct washers for early 911 case through bolts? The came off our 1970 914-6 (aka 1969 911T). As you can probably see, they have a bevel on the interior. The OD is flat on both sides.
http://forums.pelicanparts.com/uploa...1703047974.jpg

When I look up the associated part numbers (901-101-161-01, 901-101-161-02, 901-101-161-03) one side has an exterior bevel. Is this an evolution in design, or do we have the wrong washers?
http://forums.pelicanparts.com/uploa...1703048154.jpg

dennisv 12-19-2023 08:17 PM

Wouldn't you know it. Right after posting this I found the answer. According to Bruce Anderson's Porsche 911 Performance Handbook, the washer I have at top was used on early engines up until the 2.7-liter of 1973.

Flat6pac 12-26-2023 05:27 AM

Yes, the tapered ones came with the larger base on the 2.7 and later cylinders
Bruce


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