bhai used cars main aisa hota hai, koi bari baat nahi...2007 is a good 13 + years old model. so , head gasket pehle hi weak hogi. ooper se coolant nahi hai, to cooling system main for sure rust hogi pehle hi... ek baar apko paisay laga kar sab cheezain set karwani hongi , radiator clean karwayen, pipes hoses change karwa lain, coolant dalwa lain, water pump achhi quality ka change karwa lain, aor baqi cheezain bhi achhi tarha check karwa lain ek bar...
itni purani car main risk hotay hain..so until and unless you are completely sure about your car, don't take it on such a long route ...
car ka engine strong hai, per ek bar fix karwana hoga !