Poll:IMS related engine failure

[landrovered]

2001 Boxster S with 3.6 variocam plus engine with 55k miles. Started running poorly and made rotational chirping sounds like a water pump that is failing can make. I removers the serp belt and the sound did not go away. The exhaust cam on bank one had jumped one tooth and the bearing while still intact was wobbly and the ball bearings were no longer spherical. There was a small amount of glitter in the oil filter but the majority of the swarf was in the intermediate shaft behind the bearing. I replaced the bearing with the Pelican bearing using the LN tool kit. I recommend that you pin the crank and the number one bank on three chain motors and not rely on the set screws provided with the pelican bearing kit. My exhaust cam jumped a few links and was a royal pain to get back in time but I was able to do it with the motor in situ. Lesson learned. I cleaned the sump and all the accessible areas of the block to remove any swarf, I also changed the oil and filter after 40 miles and am going to change it again at 500 to make sure that any metal particles are removed.