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I'm no expert (nor am I sure what kind of heater core you're talking about), but I have two suggestions:
1. It's poorly designed for the temperatures it's been operating at, and heated so much it broke (due to expansion).
2. It cooled too quickly after being hot. Imagine heating something up, and then dunking it in ice cold water. LOTS of stress on the materials occurs. That could lead to breaking too.
What else can I help you with?
Why is your passenger side floor board soaked?
Crack in the heater core
What causes the heater core to leak?
Corrosion.
What causes heater to fail in 2002 cougar?
You prob have to replace the heater core
What causes heater core to not get any water when car is not losing coolant or overheating?
Heater core may be air bound and have to be bled Heater core may be plugged or restricted Thermostat may not be opening allowing coolant flow to core
What causes an antifreeze smell when the ac or heater is on in a 1993 Cadillac Fleetwood Brougham?
leaking heater core
What are causes for no heat in an Oldsmobile?
Most likely a bad heater core
Where would your 95 ford explorer leak if the heater core is no good?
On the passengers side floor board or if the heater core just has a small crack then it will fog up the windshield when the defroster is turned on and smell very bad......
What causes fumes to come inside car when heater is on?
Check inside the car undre the dash , check the heater core.
What causes the heater to go out on the Ford Tempo?
Bad heater core. Its a pain to replace. get a Hanes manual if you wanna try to do this.
What causes heater core failure?
Never flushing & replacing your anti-freeze/coolant...
What causes windshield on 1996 grand Cherokee to fog up?
bad heater core.
What causes water on passenger floor board of 2005 Chevrolet impala?
Heater. Core
