See more reinstall TIPS in the bottom of this summary. These are incredibly important to prevent a Check Engine Light after reinstalling the intake runner flap assembly.
This C7, 2012 A6 3.0t w/142K miles developed a pretty serious coolant leak from underneath the supercharger, but it was not where you would have expected it. In this video you will see the car with the front lock carrier in Audi Service Position, bumper cover removed, supercharger removed and a replacement of the water pump, thermostat, coolant pipe, vent pipe, etc. Use Google to find the removal and service position procedures as I did not have time to show the how-to in the video. After the front lower fender liners are removed, there is 6, 10mm bolts, 4 coarse torx screws, 1 washer fluid line, and various electrical connections to remove the bumper cover; depending on the car's options.
Some more tips for this job: the broken coolant pipe has several items mounted above it to remove before it can be torn out. The Intake runner flap and fuel rail assembly being one of them, which means the fuel connections from the high pressure fuel pump to the rail, and the line from the right rail that leads to the left rail need disconnecting, and several T30's holding the stainless fuel line down the top of the engine. Also, there are mounts on the coolant pipe that secure it to the rear, top of the engine that were very difficult to remove because of clearances. I used my micro 1/4" ratchet and 1/4" torx bits for these.
The MOST IMPORTANT PART OF THE REINSTALL, has to do with placing the intake runner flaps in the correct position by folding them gently with your fingers, before threading in the (5?) torx bolts and 2, 10mm nuts on the top of the fuel rail. In each intake port, there is a thin metal divider. The intake runner flaps need to be turned down a tiny bit, so that the runner flaps will be able to fully open to 100%; exposing the valves. Which means the flaps need to be on the RIGHT SIDE of the thin metal divider (on Bank 1-pass side ports). If you DON'T move the flaps to the right a tiny bit, before pushing the assembly down, the flaps will be in a stuck closed state.
Please don't hesitate to leave a comment or question about any part of this job. I will not soon forget it.
29 сен 2019
