I drove to the garage with my jeep and switched the engine off, when I tried to start it again it would start but not idle then would not start at all. I then realized the engine is locking.
I drained the oil and the strange thing is anti-freeze came out first then the oil. The oil and anti-freeze did not mix at all in the sump.
I suspect when it went for service they put the coolant in the wrong place. Could that cause the engine to seize?