STM had the Evo ready to pick up after a week. As suspected, it had a blown head gasket. They machined the head, but said the rest of the head components looked good, so the bill was less than expected. They also fixed the tune to ensure the engine wouldn’t blow the head gasket again. They also pointed out that there were some non-OEM parts used in the work performed, which STM replaced.
As it was basically winter time here and I had many pressing issues to attend to, there was no opportunity to test the car outside of getting it on and off the trailer. Next up will be a track day with Patroon at Lime Rock Park in May 2019.