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The engine's drive chains run on pads. Over time these can wear. If they wear too much, the engine can jump timing. You can check them visually, but that's expensive. You can get an indirect look at the variocam pads by watching camshaft deviations with a Durametric. The deviations should be rock steady when measuring them. Over a long period of time, the deviations may change as the pads wear. If the deviations get too big, greater than +/- 6 degrees, then think about a more detailed diagnostic or replacement
Last edited by thom4782; 11-21-2013 at 05:44 PM.
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