i was testing out a new intake and i noticed at high rpm that my radiator cap shoots out coolant but at low rpm its fine and i haven't had to add coolant.
radiator cap leaks at high rpm on 2006 Nissan Titan
The radiator cap has two seals a pressure seal and a seal that allows for coolant recovery. Check the cap is in tact and functional, check the sealing area in the radiator has no nicks or burrs either. Sometimes pressure build up in the cooling system is a sign of a blown head gasket but if you are not experiencing coolant loss or over heating you are probably OK.
hey buddy titans are known for thier weak radiators...i have cams headers exaust tune and this is a common problem i have