At AEA, we will:
Change the thermostat - This pesky little component is a frequent cause of overheating. If your problem is sudden and severe, it may well be the root cause.
Check your circulation - Another frequent contributor to overheating. If the thermostat doesn't stop things up, your water pump might.
Give 50 percent - Incorrect water to antifreeze mixtures can cause your auto to overheat. A mixture that is lean on anti-freeze is often the culprit when the overheating is consistent.
Check for Slippage - Drive belts around the water pump can be another source of headaches. Even slight slippage in this area can lead to engine overheating on long trips and at high speeds.
Look for Leaks - Not to state the obvious, but look for any obvious leaks. Tell tale puddles beneath your car are a sure sign something's awry. Check that all your hose clamps are tight and replace damaged or leaking hoses right away.
Check your radiator cap - If you have the tools to check it, make sure your radiator cap is holding pressure. At lower pressures the boil temperature is also lower causing your car to overheat more quickly.
Check for internal leaking - If you are able, check your system using a cylinder pressurizing tool. If air leaks through you can be sure your coolant will as well.
Check Your Hoses - older hoses sometimes collapse from suction and can inhibit flow at higher speeds.