help! new car, stupid move. Added 1/2 gallon of windshield washer fluid to the coolant reserviour before noticing the mistake. Do I need to flush out the entire radiator? And can I do this my self? The dealer wants to charge 150!
I would not do anything with it. I don’t think it will do any harm anyway.
or you can use a turkey baster and remove as much as you can and refill reservoir with the same coolant mixture.
Windshield washer fluid is mostly water with some methol alcohol. So the worse thing you’ve done is dilluted coolant ratio. Remove 1/4 gallon from the coolant reservior, and add 1/4 gallon of straight antifreeze back into the reservior. That puts you back to a 50/50 mixture of antifreeze/water.
Has it been driven? Be sure to use the prescribed coolant. I don’t know for sure, but it is probably G05.
We just went over this with someone else last week. Please search and review that information.