WARNING - DO NOT ATTEMPT THIS IF THE ENGINE IS HOTNote:- All the pictures were taken before cleaning, not afterTools required :-
Ring spanner size 13
Torx Socket size E10
Socket size 7
Circlip Pliers (or a decent set of pliers will do)
Parts required :-
Throttle Body Gasket - Part Number 90543950
Breather Sump Gasket - Part Number 90500571
Can of Carb Cleaner
Undo the circlips on the rubber hose and remove the hose
Using the ring spanner, undo the bolts holding the metal pipe to the sump.
Clean out the rubber tube and metal pipe with Carb Cleaner, I used a piece of rag soaked in carb cleaner, attatched to a lenght of wire and kept dragging it through until everthing was clean.
Replace the gasket on the bottom of the metal pipe and reasemble.
Using the circlip pliers and a size 7 socket remove the breather tube and the air intake (arrowed).
Now, slide the grey section of the DBW connection towards the back of the engine until it reaches the stop.
You can now remove the DBW plug.
Remove the thin plastic tube.
Remove the water hoses from the throttle body (arrowed in blue) you may spill a little water doing this.
Remove the hose arrowed in red.
Unbolt the throttle body useing the Torx socket (4 bolts).
Now put some rag into the intake well (you don't want to drop anything down it).
Remove the rest of the plastic tube from the base of the throttle (red arrow), then clean the pipe out with carb cleaner (arrowed in green), I used a piece of wire to do this.
Clean out all parts with Carb Cleaner and clean rag, paying particular attention to the edge of the butterfly. Make sure the butterfly operates smoothly, if not, a little 3:1 oil should do the trick, wipe off any surplus.
Make sure the hole arrowed is not blocked in any way, again I used a piece of wire to make sure.
You can now reasemble, tighten the throttle body bolts to torque setting 9Nm (7lbs/ft).
The sump breather gasket should be fitted with the raised part facing upwards, the sump beather
pipe should be tightened to 25nm.
Start the car..and bingo..jobs done.