Car Questions
RepairPal is your advocate for car care advice and guidance

Upper radiator hose

(2004 Dodge Grand Caravan)
in Turlock, CA on January 30, 2009
Have 04 dodge grand caravan 3.3 engine, Diving along 65 to 75 miles per hour,heat gauge shoots up to very very hot, get out check engine,heat gun says 170to180.and upper radiator hose is closed . do you know what causes this, I have changed thermasat,coolent, and had radiator rodded out and changed heat temp sensor, does anyone have answer ?
Displaying 1 answers & 0 comments
Popular Answer
on February 01, 2009
In rare instances, the water pump impeller may be slipping on the shaft. At the speed you indicated, the air flow through the radiator is sufficient to maintain coolant temp provided there are no air flow restrictions. Make sure the belts are routed properly. Low coolant level in a cross flow radiator will equalize in both tanks with engine off. With engine at running and at operating temperature, the high pressure inlet tank runs full and the low pressure outlet tank drops, resulting in cooling system aeration. Aeration will draw air into the water pump resulting in the following: High reading shown on the temperature gauge. Loss of coolant flow through the heater core. Corrosion in the cooling system. Water pump seal may run dry, increasing the risk of premature seal failure. Combustion gas leaks into the coolant can also cause the above problems.
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I have a 94 s10 pickup 2.2l manual I am having a strange problem when the whether is extremely cold (below freezing t...
My 1999 Nissan Pathfinder ac works great. Now it is winter and my heater only blows out luke warm air when heater is ...
Didn't find what you were looking for?