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Originally Posted by BYprodriver
No engine should be started unless it will be allowed to reach its operating temperature (minimum 180 degrees) Porsches seem to need the higher oil pressures that come at higher RPMs (3500 + ) for best lubrication in the engine, IMS included. And specifically in the case of the OP Vario-Cam engines should not cruise @ 2200rpm - 2500rpm to prevent Vario-Cam advancing back & forth or off & on.
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While generally true, remember that the IMS bearing does NOT receive pressure lubrication, but is a sealed bearing (and that is a good part of the problem). Also, since his car is an 04, it has the newer, vane cell type variocam, that does not change the chain tension as it works.