Leak in radiator

Car Overheating? Why your Car Overheats & How to Fix It

www.vikingspeedshop.com/car-overheating-fix-prevent-future/

Rating: 4.2 - ‎51 votes
Oct 30, 2015 - The biggest cause of this is a faulty thermostat that is stuck closed. ... If the radiator cap were to be at fault you most likely would see steam from boiling coolant. My car only overheats when I accelerate hard or drive hard!

Why Is My Car Overheating and What to Do? - EnkiVillage

www.enkivillage.com/why-is-my-car-overheating.html

An overheating car can be caused by many problems. ... Why Is My Car Overheating: Possible Causes .... If you do open the hood, try to do so only when the car is cooled down. ... Never open the radiator cap while the radiator is hot, as the release of pressure could lead to serious ... I wonder if my radiator might be clogged.

Common Causes of Overheating ' ASC Industries, Inc.

asc-ind.com/cooling-system.../common-causes-of-overheating/

... injury, never, ever attempt to remove a radiator cap while the engine is hot! Anoverheated engine can be caused by anything that decreases the cooling system's ...Possible leak points include hoses, the radiator, water pump, thermostat housing, ... Be sure to use the coolant recommended by your vehicle's manufacturer.

Diagnose Engine Overheating - Auto Repair Help

www.auto-repair-help.com/auto.../diagnose_engine_overheating.php

How are you sure it is overheating? Temp gauge? Most likely are stuck thermostat, bad fan thermostat switch, bad fan. bad head gasket. Coolant going into overflow when hot is how that system is suppose to work. As it cools, fluid is drawn back into radiator. It it is not really overheating, bad radiator cap can allow coolant into reservoir more than normal.

Yes, the cap could be it. But, I would also check the strength and concentration of the antifreeze/coolant to make sure it's 50/50.

Also, check that the fan is coming on for the radiator, even though it may seem to not be overheating.

Good luck on this repair.

From your description of symtoms it sounds like you have a bad water pump. If the coolant is not circulating properly you will have a heating problem. Sometimes even a new thermostat can stick and cause the engine to overheat. I have seen them fail in as little as a week after they were installed.