This might help it was taken from the VWVORTEX web site it's the post about doing the chains. (If everything is lined up properly and the engine is at Cyl. #1 TDC, you should be able to slide the camshaft locking tool (VW tool #3268) into the grooves. Instead of using the VW tool, I just used two 1/8" thick pieces of Al plate (purchased at Lowe's) to lock each camshaft individually, as shown by the red arrows in the picture below. You can use pretty much any 1/8" thick metal or dense plastic plate for this purpose.)