I am trying to find a DIY on how to swap coolant on the G-coupe.
I am planing to run 75% water and 25% coolant mixture (may be even less), however i cant seem to find any write ups or anything on this matter.

Anyone have any tips or can help me on this?

 

Living in Long Island, you should probably use 50/50.

 

at 25% coolant i do not forsee any problems with freezing.

 

If you're asking how to change your coolant, you probably don't have enough knowledge on the topic to support that claim that you won't have any problems. I'm not trying to say anything personal about your abilities or knowledge, so don't take it personally or as in insult... but you really should be using a 50/50 mix of coolant to distilled water so that your car is protected both in the lower and upper spectrum of the temperature ranges that the motor may possibly reach(generally -34 to +270 degrees F is supported by most Antifreeze products when mixed in a 50/50 ratio with distilled water). Automotive Antifreeze is formulated with the intent in mind that it is to be used at a 50/50 mixture ratio.... when you use less, you raise the freezing point significantly, lower the boiling point significantly and decrease the corrosion resistance of the coolant.

Do what you want, but I suggest using the 50/50 mixture to get the best of both worlds in terms of freeze point, boiling point and anti-corrosion. I can't really think of any reason not to use the recommended mixture unless you're trying to save the extra $3 that it costs to fill the system with 50% antifreeze instead of the 25% that you suggested.

 

^^ no offense taking. But i am pretty aware on how to work on my car. I do all the modifications on my car and i do plenty for my friends as well(and i do not mean changing side markers or putting in clear bulbs). I have never done a coolant change before on any of my previous cars that is why i am asking on how it needs to be done on this particular car especially with the bleeder screw/tap located somewhere on the back of the block.

Reason why i am going for such a mix is that water has better cooling ability then the mixture. Because the car was designed to run it, it does not mean that it is always the best thing out there.

Running auto-X and road course i would like to have better cooling properties then the 50/50 mixture offers me. the cooler the car runs when you push it the better and the longer the motor lasts.

 

I have heard some systems can have a vapor lock in the cooling system when completely drained. When I changed mine, I flushed while the engine was running. Keeping clear water going in, then shut engine off and drained the radiator and cleaned out the slobber tank. Then filled both with a mixture of 50/50 coolant and a bottle of water wetter. By not completely draining the system (block), I estimate about a 30% water coolant mixture. This might help.

 

turn on heater full blast too.... get it circulated through the heater core to make sure there are no air trapped

 

thanks guys for the tips.

 

myGspot You may want to take a look at REDLINE OIL Wetter Water coolant additive. This is used to help reduce coolant temp. Additional information can be found here
http://www.redlineoil.com/products_c...ubCategoryID=4

 

You need 50/50 to ensure corrosion resistance. It's not just about cooling.

 

You are correct Sir