If the aluminum Turbo covers are still flat and you have been using the green silicone-beaded graphited gaskets ... then you are probably overtightening them!
The torque spec has been very low -- lower than the M6 sump cover nuts -- at 8 Nm, about 5.8 lb-ft, since 31 March 1981! A 1/4" drive torque wrench is needed to accurately measure the toque. In a pinch you can use a 13 mm combination wrench with your hand as close as possible to the nut -- one hand only, just the four fingers of your right hand to tighten, and it won't be too tight.
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Warren Hall, Jr.
1973 911S Targa ... 'Annie'
1968 340S Barracuda ... 'Rolling Thunder'
Last edited by Early_S_Man; 12-08-2002 at 11:43 AM..
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