Coffee colored coolant

[j.fro]

Happened to me and it turned out to be a cracked head. The car was running fine, too. Be sure to do an oil change along with the coolant flush. When the car is running, the oil pressure is higher, thus the oil in the coolant. Once the car is off, the pressure is greater in the coolant, and then the oil gets contaminated. Coolant does terrible things to engine bearings and other moving bits.