The Motorcraft chart indicates exactly what to do if you have green coolant previously in there.
Quote:
GY = Factory-filled with green-colored engine coolant. Service as normal with green-colored engine coolant, or service with yellow-colored engine coolant with the following important conditions:
I. If the green-colored engine coolant is thoroughly flushed out of the cooling system and then the system is filled with yellow-colored engine coolant, the
service maintenance (change-out) intervals of the yellow-colored engine coolant can be followed.
II. If the green-colored engine coolant is not completely flushed out of the cooling system (e.g., yellow-colored engine coolant is used to top off the system),
then the service maintenance (change-out) intervals of the green-colored engine coolant must be followed.
Prior to starting this task, verify you can get the camaro out of the garage.
Quote:
GY = Factory-filled with green-colored engine coolant. Service as normal with green-colored engine coolant, or service with yellow-colored engine coolant with the following important conditions:
I. If the green-colored engine coolant is thoroughly flushed out of the cooling system and then the system is filled with yellow-colored engine coolant, the
service maintenance (change-out) intervals of the yellow-colored engine coolant can be followed.
II. If the green-colored engine coolant is not completely flushed out of the cooling system (e.g., yellow-colored engine coolant is used to top off the system),
then the service maintenance (change-out) intervals of the green-colored engine coolant must be followed.
Prior to starting this task, verify you can get the camaro out of the garage.
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