* Heater Core Leak: The heater core is a small radiator located inside the vehicle's dashboard. It's part of the cooling system, allowing coolant to flow through it so that heat can be transferred to the air blowing through your vents. When the core develops a leak (often due to corrosion, rust, or age), antifreeze will seep into the air passages and blow out into the cabin.
Several factors can contribute to a heater core leak:
* Corrosion: Over time, especially in areas with harsh winters and road salt, the heater core can corrode and weaken, leading to leaks.
* Age: A 25-year-old vehicle is likely to have components that are nearing the end of their lifespan, and the heater core is no exception.
* Pressure: High pressure within the cooling system can exacerbate existing weaknesses in the heater core, causing it to fail.
* Manufacturing Defects: Though less common, a faulty heater core from the factory could also be a factor.
What to do:
This is not a DIY repair for most people, as it requires significant disassembly of the dashboard. Do not drive the vehicle until the leak is repaired. Continuing to drive with a leaking heater core will:
* Damage the interior: Antifreeze is corrosive and can stain or damage your vehicle's interior.
* Overheat the engine: Loss of coolant can lead to engine overheating and serious damage.
You should take your truck to a qualified mechanic immediately for diagnosis and repair. They will likely need to replace the heater core. This is a relatively complex repair, involving removing part of the dashboard to access the heater core. Getting a professional repair will prevent further damage and ensure the job is done correctly.
