rx-7-94

What kind of coolant is best to use? getting ready to flush and install a new koyo radiator opinions would be great Thankyou...

7racer

just the normal stuff, not the orange. Since it is summer alittle more water than coolant. If you dont plan to change the coolant before winter and u live in Utah, you might want to get 60:40 ratio or so.

Water wetter or purple ice additives you might want to try. Some controversy on what they do to coolant seals but most find they are fine.

Also, might want to consider Evans Coolant, but again, some controversy on it as well.

rx-7-94

Okay cool thankyou just wanted to check before i did it and does that redline water wetter really work?

sevensix

iTrader: (1)

people have been debating this for years.

i use purple ice myself.. i heard its safer for the coolant system

rx-7-94

okay ill just try that one then since the redline stuff id have to order and ive got purple ice here so thakyou...

M104-AMG

iTrader: (8)

For aluminum, esp. with aluminum-core aftermarket radiators, I HIGHLY recommend the Valvoline G-05 (aka, Mercedes-Benz Coolant).

I have been using for over a year, and have NEVER boiled-over, and that's in FL heat & humidity, with only ONE oil-cooler, and numerous track-days.

:-) neil

http://www.csfimports.com/tech.htm#antifrz

Busted7

Im told on the purple ice you need to mix it with water before you put it in the rad. Was told from dealer!

jolly

All propylene and ethylene glycol types that you mix with water are the same, no matter what anyone tells you. Pick your color, once you pick it stay with the same type to avoid mixing the stabilizers. (Some people brag about the color of their coolant- go figure). The proportion is important.

Water wetter and/or Purple ice are surfactants (aka soap solution), They increase heat transfer by decreasing the surface tension of water. Couple drops of Dawn in your radiator will do the same thing.

Distilled water with a surfactant is the best coolant. Propylene glycol alone is the best antifreeze. Both will need some anti-corrosion agent.

Be sure to change radiator cap.

Larz

It's like batteries. A lot of it is made by the same few companies. Just a differnt sticker on the bottle. So many corporations own others. Federal Mogul owns so many alone I can't count them on my hands.

rx-7-94

Can i get this valvoline any where or just at a mercedes dealership??

Also which radiator cap would yo guys reccomend??

sevensix

iTrader: (1)

stock .9bar/13psi cap

M104-AMG

iTrader: (8)

PepBoys or Napa usually carries it, but call ahead.

Your best bet is either an independent Mercedes specialist shop or the dealer (much more expensive).

Also, I use it exclusively in my aluminum-engined Mercedes for over 10-years.

Never a failure due to the coolant.

:-) neil

rx-7-94

Nice thankyou thats probally the stuff i will run even if i have to pay a little more and get it from the dealer...

lead_foot

how much are you suppose to pour into the radiator- i have the stock one and I cant find the dimensions.

CantGoStraight

You should pre mix it before you pour it in, that way it will be exactly how you prepared it instead of adding some of this then alittle of that in the system itself. Plus you'll have some spare stuff you can carry with you and add if needed.

gafu mazda

you just sent about 20 people out to the kitchen to steal Dawn for the radiator.......21,i gotta go.