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Q: What do I use to stop small coolant leak in heater core?
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What are causes of Coolant leak?

Broken or split hose Radiator leak heater core leak


Is there oil in a heater core that can leak under the dash?

not any oil in your heater core although the heater core uses coolant coming from and returning to the engine so when damaged or being worked on coolant can leak under the dash and into the floor


Why is coolant leaking from the heater drain line on the engine firewall of a Pontiac sunfire?

heater core has a leak replace heater core


How can the coolant from the radiator leak inside the cabin space?

heater core


What would cause a puddle of coolant in the passenger side floor of a 92 Chevy corsica coolant leak?

Leak in heater core


Will a bad heater core cause the car not to start?

No it wont. The heater core is just a small radiator inside the cabin that when the fan is turned on heats the air. A bad heater core will cause you to have no heat inside or will leak coolant on the carpet.


Why is coolant going on windshield of 88 Buick regal?

possible leak in heater core.


Why would coolant leak through the vents in your jeep wrangler?

Leaking heater core


Why Coolant leak below glovebox on Dodge Caravan?

Your heater core is probably bad.


Coolant leak on 93 cavalier?

A coolant leak on a 93 cavalier could be anyplace where coolant flows. Check all hoses, connections, the radiator, and heater core for any possible leak spots.


What are the symptoms of a bad heater core?

coolant leak inside car underdash on pass. side


Why would coolant leak from the aircondition condensation drain tube of an E350 econoline van?

The heater core is located in the same place.If you have coolant coming from the tube,your heater core is bad and needs to be replaced.