 overheating issue 1998 318ti
hi guys, im a newbie here, I like it says in the title I have a 1998 318 ti, it runs great, and suddenly the thermostat keeps saying its overheating. no smoke, and it goes back down and up in seconds. it sounds like I might need a new thermostat or just overhaul the entire cooling system. all fluids have been checked and are top notch. any advice?? thank you! | 
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