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Sep 05, 2013 6:58 pm
Sep 05, 2013 6:58 pm
Subject: Re: What is this part?
I take it from Ray's helpful remarks that the cut-outs in the tool's underside as illustrated above in Christian's photo are intended to enable setting of the cam timing by reference to the position of the cam lobes & their profile matching the cut-outs in the tool. So I can well understand Tim's remark that other tools are more heavily constructed as being less prone to distortion. I agree entirely with Ray that the proper way to set the cam timing is with a dial indicator gauge not some technician's home-made short cut. The other facet to perhaps consider is the provenance of the tool to a specific Rapide in that there were at the time several cam profiles available (DB4, DB4GT, standard Rapide, experimental [as my other car], etc) and without a micrometer etc one cannot be sure the tool actually matches the cams installed in a particular engine.
I take it from Ray's helpful remarks that the cut-outs in the tool's underside as illustrated above in Christian's photo are intended to enable setting of the cam timing by reference to the position of the cam lobes & their profile matching the cut-outs in the tool. So I can well understand Tim's remark that other tools are more heavily constructed as being less prone to distortion. I agree entirely with Ray that the proper way to set the cam timing is with a dial indicator gauge not some technician's home-made short cut. The other facet to perhaps consider is the provenance of the tool to a specific Rapide in that there were at the time several cam profiles available (DB4, DB4GT, standard Rapide, experimental [as my other car], etc) and without a micrometer etc one cannot be sure the tool actually matches the cams installed in a particular engine.