Wow, it's a dirty one! Hi Poyta. Did you start from the big hose coming up to the flap motor section? Did you have any problems fitting the hose back at the end? The fitting was so difficult last time that it's the only thing that stopped me from repeating this cleaning surgery. I am getting mentally ready for it and bought "Cheap" degreaser already. I had it done two years ago, but it was too late as the sludge got into electronics compartment of the flap motor section. I am no longer using Caltex, switched to BP only + all Morey and Moly additives, but I guess it might still need the cleaning.