I just wanted to pass on to you guys that Snap-on has a great tool for removing the glow plugs. It is a 8mm & 12 mm offset ratcheting box wrench. I can tell you from personal experience that this tool works great on the 602.962 motor, without removing the intake.

The tool retails for around $23.00 and can be found on www.snapon.com

part#YA6729