Not 911 but close.....

[911quest]

This is what the crankshaft and its housing look like once removed from the engine. Now you can remove the main bearing bolts used to hold the housing together to service the crank and the rod bearings.



Here are some of the special tools needed to reset the cam timing during reassembly of the motor

A) Fixing pin for the crank pulley 9595 allows rotate the motor over
B) Auxiliary chain tensioner 9599 used to set the proper tension on the chains during timing
C) Locking device for camshafts 9612 Locks camshafts in timing position
D) Ring wrench no tool number used to tighten the tensioners
E) Holding device 9634 holds the camshafts down
F) Holding device 9611 holds cam shaft down (not shown but similar to 9634)

[911quest]

It shares a lot with the water-cooled 911 engines also. One major difference is the way the Vario-cam plus works. It uses a locking style lifter that basically two parts as the cam has two separate lobe profiles. As you can see in the diagram above when the engine desires low camshaft lift the small lobes open the valve and when more valve lift is needed the locking pin is actuated and the lifter locks allow the valve to open further.