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Valve adjusting - Special Tool
(by Chris Gilman)
To accurately measure valve clearance, go to your local
Porsche dealer and purchase a 911 valve adjustment gauge, and several
replacement blades. 911 valves are adjusted to 0.10mm, the same as
Bergs, so the blades only come in this size. This cleverly shaped tool
allows you to slip it into the space and feel the clearance. Be careful
not to twist the tool and tear a blade, which is why you need several
replacements, for the learning curve. There are also aftermarket tools
available, but the handle tends to be larger, and will not fit into the
space. Get the real thing, tool number P21 - see the photo
More information: please check regular
valve adjusting procedure here
Special Porche 911 tool
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