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Registered
Join Date: Sep 2011
Posts: 8
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camshaft
Hi all,
While tightening down the camshaft nut while working on the timing, I had this happen (see photo). I'm not sure exactly how I accomplished this and I am at a bit of a loss as to how to continue. Has anyone seen this before? I have to assume I did something drastically wrong, although I really don't see how I could've had the strength to do this... I guess I need to find a new cam that matches the specs of this one, but is there anything I should take into consideration? I know the crankshaft has been turned once...does that matter when looking for a replacement cam? 
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09-24-2011, 09:10 AM
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Registered
Join Date: Jan 2004
Location: CT
Posts: 11,567
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Send me the casting numbers off the cam. I can likely provide a replacement at reasonable costs.
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Tom Butler 1973 RSR Clone 1970 911E 914-6 GT Recreation in Process |
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09-24-2011, 09:33 AM
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Max Sluiter
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You can convert to the later bolt style cam sprocket attachment.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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09-24-2011, 10:14 AM
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Manassas, VA
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The cam was probably dropped at some point and a stress fracture developed. The crack is not from an over torque event because you hold the cam on the front flats and apply the torque to the same part. Unless you had excessive spacers between the cam sprocket and the cam tower you could not have generated enough force to pull that piece off the cam.
Was this a welded and reground cam? If so I would ask for a replacement, maybe it was overheated in the welding process and/or not cooled correctly. Mark
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1991 964 Polar Silver Metallic Turbo Coupe |
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09-24-2011, 05:15 PM
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1971 Porsche 911S
1991 Porsche 964 Turbo 3.3L
