2007 tundra, i am loosing radiator fluid daily. It is coming out of the secondary container mounted to the fan shroud... from the over-flow tube at the top. I believe the thermostat is seized and it m
all happend over night, or what? parked a year.? or?a daily driver? or a victim of bad service procedures, just came back from a tuneup??no scan tool? , to see DTCs thrown, my guess,,, overheated. DTC.fan belt not loose or fell off and gone?lost fluid (sort time):1: overheating2: bad head gasket (or worse cracked head or block)3: A/T tranny, the cooler is pushing AF in to the ATF cooler bad, and coolant is pushing to the trans pan oil4: AF fluid on passenger toes, heater core leaks.there are many test for hits.did you check for 50%AF protection using the $2 tool? every fallif not and not living in KEYWEST, you can crack any engine block or head or both, so dont forget that. most places in USA can freezethe tests: engine or A?T oil on dip sticks look like chocolate, milk shake? oops. overheating, the gauge show it.the rad leak down test, tool fails.the read exhuast guesses in rad neck tooleasy:new thermostat, not put in backwards.make sure both big hoses are hot on rad, if not the pump impeller fell off. questiondead cold engine, check the rad lever. in the next firstand fill it with 50%AF. if not.that is full, the side tank can fail (tube inside drops off)then does it puke out? in 15min.