Radiator and all hoses preventively replaced over 1 year ago and no overheating problems observed. During long trip to Florida from St Louis in June engine overheated in Georgia. Thermostat, water pump and coolant replaced and arrived in FL without further incident. During return trip to St Louis, experienced overheating again, replaced overflow tank cap, which failed pressure test.
Now the engine is losing coolant again; during a recent 2 hour trip to southern Missouri, again overheated and needed to add 2 gallons fluid to fill! No evidence of any external leaks and no evidence of headgasket leak as exhaust is dry. Did observe that there is evidence of coolant flow through the overflow tank drain hose, although there is never any fluid loss actually observed.
I'm stumped! What have I overlooked or misdiagnosed?
Now the engine is losing coolant again; during a recent 2 hour trip to southern Missouri, again overheated and needed to add 2 gallons fluid to fill! No evidence of any external leaks and no evidence of headgasket leak as exhaust is dry. Did observe that there is evidence of coolant flow through the overflow tank drain hose, although there is never any fluid loss actually observed.
I'm stumped! What have I overlooked or misdiagnosed?
Aug 23, 2008 at 6:48 PM
