Shawn Rollick
New member
fill it 3/4 the way up. then watch its level. hot and cold. it should rise and fall if your cap is working right.
as coolant gets hot it expands and it needs to go some where, so it goes to the "over flow tank" convenient name right?
when the engine cools off, it sucks the coolant back in from the over flow tank.
ok got it. I should fill the whole bottle up to 3/4 the way? Over the line marker on the tank?