need some help here..

i'm new with this car insurance claim thing, recently acquired my unit(HONDA CITY) unfortunately in a week's time i hit a stray dog on my way home which damage my condenser and slightly my bumper which was promptly replaced by the casa chargeable to my car insurance...also included in the quotation was the replacement of my radiator which was was scratch a bit by the condenser, told the casa personnel that i dont experienced overheating and requested that it not be replaced but they insisted since it will be charged to the insurer...but with the way i see it my radiator seems okay..havent experienced overheating or high temperature.

here is my question, could i demand from the casa that i take the radiator with me once it arrives and have it as my spare if later i will experience overheating..my radiator is working just fine.

the insurer was charged 56T for the repair conducted by the casa, while the radiator alone cost 18T..

additionally, what type of coverage is this chargeable to? third party?

hoping for your advise guys....