Your water pump or thermostat needs to be replaced, if it’s your thermostat the supercharger will need to be pulled. If it’s your waterpump, a good Indy shop can replace it without pulling but if you are a DIY guy you’d probably be best putting the car in the service position and pulling the supercharger.

While you have the supercharger pulled you might as well replace the coolant crossover pipe and the pcv while you’re in there and check your intake valves for carbon build up. You can use a chemical cleaner, picks, or walnut blasting to clean them. Or say eff it and just let it be. I use BG induction cleaning regularly and assume mine are okay. Haven’t pulled the supercharger since I’ve started doing this so I have no idea if it works or not.

I’d also replace the coolant bleed screws with nice metal ones from 034 motor sports (I think those are the good ones). The stock screws are terrible.

If you plan on tuning your 3.0T, I’d recommend if you’ve gone so far as dedicated a day to doing this and in the process draining the coolant, you might as well upgrade your heat exchanger and swap this in the process!

If it’s just the water pump leaking (it leaks through a weep hole when it starts to fail) then can feel no pressure to do any of the other stuff.

Also, I’ve heard of the same test for the pcv and also have read and heard from an Audi tech that these engines are supposed to be under pressure so I wouldn’t necessarily go straight to your PCV being bad. BUT you might as well replace it too if you are pulling the SC. (Although with the 2017 the pcv should be fine, it was the early ones that had issues more frequently).

Oh, do yourself a favor and buy your parts from FCP euro starting now. Oil too. Lifetime warranty and free Returns with PayPal.

All of this said, If you are at 30k, is this not going to be covered under factory warranty?

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