Changing engine coolant and UOA...

[mikemc]

I am assuming that as long as the motor is in good shape and has no current issues of oil mixing with coolant, that changing coolant should not affect a UOA. Seem reasonable? My truck and factory coolant have over 2 years and 36K miles and I am flushing/changing coolant tomorrow.

 

[427Z06]

As long as you don't spend a lot of time idling the engine to flush the system, it shouldn't have any effect whatsoever.