With rotten leaking head gaskets, I don't know how you can tell all that.
Maybe he just needs to lean down the mixture on the coolant injection screws. :D
That motor has been burning coolant for quite some time.
I've been doing this almost 30 years now...lol.
The signs are all over those parts. Coolant doesn't burn, it cleans if it's really present a lot, or leaves deposits if it's not that much over time. There's enough grungy crap on those parts to tell a lot about how it was running, and compare that to his original complaints.
