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About snorth54

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  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2004 911 40th Anniversary

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  1. Thanks for the link. You are correct I have the Variocam Plus. I have found sveral good articles covering the Variocam arrangement. I just replaced the IMS bearing at 20000 miles just for peace of mind. One suggestion I did not see on the posts is to cool the bearing with the installer assembled in your home freezer and use a ceramic or space heater to warm the shaft. I slid the bearing and driver into the shaft, wiggled it a little so it went in a little and was square and a light tap was all that was required to intall the bearing. I had preset the calipers so I would know the bearing was all the way in before removing the aluminum driver. Sorry to drift off the camshaft topic, should be a different post.
  2. I have no more information on the readings, however I can share the information Durametric provided for my 2004 911 Anniversary Edition with the Variocams. I just updated the IMS bearing and was checking the camshaft position after the work was completed. The camshaft position 1 deviation is always 1.28 regardless of RPM The camshaft position 2 deviation is always -0-09 regardless of RPM At 3522 RPM the Spec angle for inlet camshaft bank 1 is -40 and the Spec angle for camshaft bank 2 is -40 At 3522 RPM the Actual angle for inlet camshaft bank 1 is -39.65 and the Spec angle for camshaft bank 2 is -40.12 The Actual and Spec angles follow each other through the different speeds but are not tied only to the RPM. My understanding is the timing is contantly adjusted depending on engine requiring low end torque or fuel economy depending on a variety of inputs from the throttle position along with engine temperature (for warm up), etc.
  3. I am replacing the bearing in my 2004 Anniversary 911 with the LN Engineering single bearing kit at 32000 km. The original bearing is a 6204DU17 made in Poland and it appears to be in good shape, just changing to reduce the highest risk factor in the M96/03S engine for peace of mind.
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