whenever i run the car for a while the radiator starts leaking. is their anyway to block that off. or do i have to buy a new radiator.

 

If it is leaking from the plastic portion you'll need a new one. Honestly I wouldnt even bother trying to fix it. Some guy on Ebay sells new Rx7 radiators all the time, I think theyre right around 140 bucks.

 

That plastic is supposed to be black! When it turnes brown/green is has the strength of a potato chip. My old radiator cracked just from tightening the sensor on the top! I've also heard of them cracking just from someone leaning on it to check the motor.