I upgraded my IMSB after seeing loads of metal particles in the oil filter (oil pan etc etc...) and it is a tip with 160.000 km on it (100.000 miles)

Since I'm a novice to this subject of the Porsche Variocam, wonder if Jake might give me an estimate of approximately the rpm the Variocam might be actuated on the 2004 Boxster S under conditions of relatively light load. Are the "later cars" the 2003-4 models of the 986? Searching the topic (this forum and rennlist) brings a bewildering variety of opinions ranging from 1500 to 4200 rpm.

My prior experience with variable valve timing came from several years of ownership of another from the VW family tree, a 2003 Passat W8 (eight cylinders, four liters, four cams, some entertainment value but loads of trouble). I'm still trying to forget.

I've read your narrative of the diagnostic workup and ultimate surgical intervention on your Tip-equipped M96. Thanks for sharing it.

I've since vowed to become downright obsessive with my oil changes and inspections of my newly-installed LN magnetic drain plug.

You are most welcome.

Just to clarify things, I should add that Jake did send a PM: "No, cars post 2003 have 3 chain engines with load sensitive- constantly variable adjustment".

Thanks, Jake. I should have guessed that's why Porsche called this version "Continuous Variocam." So for me there's clearly no simple formula for avoiding the engaging or disengaging the Variocam feature based on rpms.