It's a PITA to get to 3 torx screws that attached a large black box of electric connectors, I used a stubby ratchet with a torx socket. A few other wires and stuff to remove to get the intake manifold off.
I used a small piece of plywood to cover the port, had 2 holes in it, one for the blaster nozzle and another for the shop vac. The valves in a few cylinders are closed at the same time, so you can do a few cylinders before you have to turn the engine. I turned the engine by putting a socket on the crank.
It would be great to have a longer nozzle to reach further into the head, the HF nozzle works, but you still have to do some work with a pick or something to get them really clean, especially the backs of the valves.
2007 335xi 6AT / Vishnu Procede V5 / Vishnu DCI / Vishnu Meth kit (PWM) / AR Catless downpipes / Borla racing pipes with Magnaflow muffler / Borla exhaust system / AMS intercooler
Best 1/4 time = 12.975 @ 107.15, 1.763 60' at Bandimere Speedway (5800' above sea level)