When it is really hot out, and I drive at high revs, my engine is close to overheating, I dont want to keep turning on my heater to let it cool down. Does this mean I have to replace my radiator? Don't remember when I last changed the coolant also. I heard that there is some kind of water mixture I can put in instead of coolant to keep the engine cooler. What do you guys think? Or should I just get an aftermarket radiator, are they worth the money? Thanks!!!

 

You may have to go with an after-market radiator if that turbo is generating to much heat but have to check to make sure the fan is working?

 

You may want to check your thermotac.

 

Get yourself a fluidyne radiator, you'll love it. People will say they cost to much, but I love mine it tooks great, keeps the engine cool, and I live in AZ where it was 112 degree 10' off the ground and in the shade, or about 180 degree 10" off the payment where my "cold air" intake is.

 

Thermostat and fan is new and in working condition

 

Since its been a while since you changed your coolant, that should be your first thing to do. When you change it, use a high percentage of water and a lower percentage of antifreeze (something like 90%:10%). Water Wetter is a good thing to add to increase your cooling.

 

Whats water wetter?