Porsche 911 GT3R 2010 Technical Manual page 34

3.8.7.3. Fitting
If visible carefully remove small edges or burrs from the crankshaft flange
chamfer with an oil stone, afterwards carefully clean the crankshaft journal
and the crankcase bore (use cleaning solvent or acetone with a clean, lint-
free cloth).
The crankshaft flange sealing face must not, under any circumstances, be
treated with emery cloth, polish compounds or wire brushes. Remove
corrosion on the crankshaft flange with a special metal polish wad.
Afterwards carefully clean the crankshaft flange with acetone or cleaning
solvent.
1. Fasten the insertion-jig base plate 000.721.971.90 hand tight and
evenly to the crankshaft flange using the hexagon-head bolt
The crankshaft seal should always be fitted dry
Do not touch the micro sealing lip
The steel ring must face towards the technician during assembly
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