Audi B7 A4 2.0T: K04 Turbo Installation

K04 Turbo Installation Write Up
The K04 kit comes with everything you need (except tools). Every gasket, nut, bolt and screw that is removed in order to get the K03 off and the K04 on is supplied within the kit. It is not recommended that you drive the car with either the K04 turbo and K03 programs or vice versa. So it is a good idea to have your ECU flashed with the K04 programs prior to installing the K04 by removing the ECU and sending it in to APR (see my ECU Removal Write Up).

*Note: The K04 Install write up assumes that the front of the car is jacked up and the CAI (OEM, Carbonio or other), Cat Converter or Test pipe and both plastic trays (underneath the car) are already removed. Im sure you can find other DIY write ups on how to remove these but if you cant manage to get these simple components off then I do not recommended that you take on the K04 install yourself even though this write up is fairly comprehensive.

Tools / Parts Required
- Torx #55 (Either socket or allan key) The shorter the better as this is used in a very tight spot see step #11.
- Metric in hex socket set and insert bits (5mm -> 10mm)
- 19mm Hose with end plug.
- Assorted sized pliers, multigrips, spanners, screwdrivers, sockets and ratchets.

The K03 Ready To Go - Installation time 4 - 6 hours.
It is a good idea to block the air input and output parts of the K03 with the red plugs that APR supply on the K04. The last thing you need is anything falling into them

Step #1
Remove heat protection from turbo coolant line by undoing the buttons
Step #2
Undo the clamp and remove hose from rocker cover
Step #3
Undo the clap and remove the hose from coolant line that goes into the manifold this is a slight PITA as there very little space. Long pointy pliers will do the trick
After doing so its important to block the manifold end as later on (step #11) this will stop your coolant from leaking out. I used some left over 19mm hose with plug from the garden sprinkler system.
Step #4
Undo the oil return line located next to the air intake.

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