Fabiaman92

Pressure test a washer bottle? Really? Washer bottles are not designed to be pressured, it is just....a water bottle. A coolant expansion tank yes, but not a washer bottle. My first thought would be if there is a hairline split at the bottom of the bottle, just enough to allow not so much as a leak, but a weep. Perhaps the weep (1-2 drops worth at a time) is then being evaporated by the engine. Failing that, a common area is around the washer pump/motor, if its located on the bottle. I've had numerous cars with tiny splits in the tubing/pump body in the past.

As a rule, it's good practise to let the turbo spool down before switching off; likewise let the engine idle for a couple of minutes before setting off from cold. On old cars, this was critical - I'm not sure about newer cars. Even at low speeds, turbos can spin as much as 100,000+ rpm. For the sake of 2 mins (which is better than not doing anything at all) I wouldn't bother risking potential turbo/engine damage further down the road.