RS246.com Forum :: The World's #1 Audi R, S and RS Enthusiast Community

Hi everyone I’ve recently was able to get my hand on a 03 rs6 and recently it’s been leaking coolant from the rear of the engine towards the passenger (US) side I can’t seem to see the leak watching it idle but I can see there is a leak as it is running down the pipe I’ll attach some photos I’m pretty mechanically inclined and have already fixed some of the issues the car was having like a bad alternator and such any idea where the leak could be coming from would be great thank you! I was able to get my fiber camera under where I though the leak was coming from but I don’t see any sort of leaks under that pipe as well.

There's a steel coolant pipe that goes round the back of the engine, where the temp sender goes into, which is prone to corrosion. You might have a pinhole on there.

Or maybe the temp sender gasket is not sealing properly.

If you take the airbox off, can you see any better? If necessary you can remove the MAFs from the airbox and put them in place to run the engine for a short period.

Is it definitely coolant. The ac draining can shed a fair bit of water. When I have been parked up several people have said you have got a water leak.
But it was from the a c unit.

Who you calling a c-unit?

Lol.

It’s definitely coolant because I’m filling up the reservoir every couple weeks as it’s going down and I can smell the coolant burning.
Hopefully this weekend I can get around to puking off the air box as that was my next move everything been put on halt for my brothers wedding but I’ll post an update soon thank you guys.