... press out the existing core an then press in the new one.
You'll need a hydraulic press with the correct spacers.
Regarding the 3000 RPM vibration, you can diminish it but you cannot get rid of it.
It is an intrinsic harmonic which is a result of the engine design.
Happy Boxstering
Pedro
Pedro Bonilla1998 Boxster 986 - 311,000+ miles:
[www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)
Racecar spelled backwards is Racecar
"Racing is life. Anything before or after is just waiting" ... Steve McQueen as Michael Delaney in "LeMans"
"If you wait, all that happens is that you get older"... Mario Andretti
"Being second is to be the first of the ones who lose" ... Ayrton Senna