radiators Available Here. Heat has always been a largely unwanted by-product of the modern internal combustion engine. Managing that heat is the job of the radiator, water pump, coolant and thermostat. Your car radiator is actually quite a fragile component and they are easily damaged, meaning they are frequently replaced. Modern radiators are generally made of plastic and aluminium and are located right at the front of the engine bay where they are susceptible to any frontal impact. We stock one of the largest selections of coolant system components around, along with millions of other car parts and accessories.