[WFBowen]

Mike: If I were you, I'd do a valve adjustment the hard way, from scratch, since things might have gotten out of whack. First, bring #1 to TDC. It's important that TDC is on the firing or ignition stroke. Lift the distributor cap and make sure that the rotor is pointing to the #1 cyl. stud on the cap. If not, rotate the motor again until it's on TDC on the firing stroke. Also, when you're "under the car", always check that the cyl. on which you're about to do the adjustment has both valves closed. Unlike Detroit iron, etc., it's critical that everything's done fexactly to specs, including a cold (overnight) motor. Take it slow & methodically - I've known seen some of the best race mechanics/tuners get distracted while doing such jobs and they just start over. Grab some coffee, turn on the stereo & take your time. Half of the pleasure of Porsche ownership has always been working on them.
Good luck.