Coolant Question: Fill or flush?
I was looking for advice on coolant. I have a 03 SES with 63k miles that has never had it's coolant changed to my knowledge. Today, I noticed it was below the cool fill level and I can see brown slug caked onto the side walls of the bottle.
The manual says yellow coolant, but I don't know where to get that besides the dealership. What coolant should I use? What is the change interval on the original coolant
I was thinking about just adding water until I could see the color, then doing the voltage test for acidity and specific density (eye dropper and balls) to temp range. Depending on what happens there I was going to add, change or flush coolant.
What are your opinions?