I've had a persistant coolant leak recently in the A6, and I couldn't fully diagnose it but guessed it was the secondary coolant pump under the intake that finally sprung a hole. It's a well known issue on the 2.7t, and a tuner company has even developed a kit to replace it with simple silicone heater hose.
This past weekend, I decided to tackle the job. Took everything off the top of the engine and pulled the intake and found this:
Looks like one of the local mouse population had taken up refuge in the warm valley of the engine. Luckily, the little vermin didn't chew anything up so it was as simple as removing the pump and replacing with the hose.
This past weekend, I decided to tackle the job. Took everything off the top of the engine and pulled the intake and found this:
Looks like one of the local mouse population had taken up refuge in the warm valley of the engine. Luckily, the little vermin didn't chew anything up so it was as simple as removing the pump and replacing with the hose.