Rob94hawk

iTrader: (1)

Gonna flush out my heater core. So what do you guys use for the hotter weather? Distilled water straight up or some other combo? Right now I'm running 50/50. Any additives? Water Wetter? Purple ice? Thanx

ahritchie

iTrader: (1)

I run 50/50 mix all year round...I doubt you would see more than a 5 degree less difference with 100% water. I would leave your coolant alone lol...if GM wanted you to use just water in hot weather they would have specified that; I've only heard of race cars running 100% H2O ...NY is not that hot anyway for the LT1 cooling system to handle....if you lived in Saudi Arabia or New Mexico with 120 degree temps on a regular basis; maybe.

1badzee

iTrader: (12)

I live in South Florida where the cool temps peak at about 40* so it is pretty damn hot year-round. For the last 5 years my car has only seen distilled water with a bottle of water pump lubricant and a bottle of water wetter. I flush it once a year or whenever I need to remove the water pump/hoses for anything. Temps stay real cool and everything is ridiculously clean inside.

jlpz

iTrader: (8)

I live in South Texas where it's pretty damn hot all year. I run a 50/50 mix as well, my car stays cool, I may take a shot at running 70/30 since it never gets cold here.

SilverSS07

iTrader: (1)

I usually run around 70/30 and use a bottle of water wetter. I wouldn't run all water with no antifreeze though. Water boils at 212* and you're high speed fan kick on around 225*. On the bottle of antifreeze it should tell you at what percentage of water/antifreeze it will protect to for high and low temps.

speed_demon24

iTrader: (6)

That's why it's a pressurized system. They teach that in elementary school.

guppymech

iTrader: (7)

50/50 antifreeze with distilled water. Tap water has minerals in it that will cause deposits to form in the cooling sys. Distilled water prevents buildup.

WS Sick

I use the 50/50 mix all year round as well, just remember water boils and freezes.

69gto96z

iTrader: (13)

I run a 70/30 Water/Antifreeze year round, and live in Texas.

gjohnsonws6

iTrader: (12)

Distilled and water wetter only here in AZ , year round

IronOutlaw

iTrader: (4)

I don't know how much you race your car but your track guys will thank you if you run straight water in the case of a busted water hose.