Coolant Additive abuse?
I'm new here. Thanks in advance for any answers.
I'm shopping for a 1999-2002 F450 Crew Cab Dually to pull my 5th wheel RV. How can I determine whether the coolant system was properly treated with additive? Would the engine need a tear down to be able to check the cylinder walls for damage (makes sense, but a seller would be reluctant, I think).
p.s.: What engine tests should I have performed to check the overall condition of the 7.3 Powerstroke?