6150M VGT actuator coolant leak

This is a real-time repair diary of a mechanic diagnosing a coolant leak at the VGT actuator on a 6150M shortly after a turbo swap. He drains coolant, replaces both actuator line O-rings, refills and tests, then discovers the leak persists from a cracked rigid steel coolant line, which he later replaces off-camera. Useful for owners troubleshooting the same leak, though it's messy, unscripted, and the final fix isn't filmed.

Appears to be an independent mobile mechanic filming his own field repairs, not a dealership or scripted review channel.