* Water Pump: A very common cause. The water pump is located at the front of the engine and is responsible for circulating coolant. Leaks usually appear as a drip or stream from the weep hole (a small hole designed to alert you to a failing seal) or from around the pump's housing.
* Radiator: Cracks, leaks in the seams, or a failing radiator cap can all lead to antifreeze leaking from the front. Look carefully at the radiator itself for any visible damage.
* Radiator Hoses: The upper and lower radiator hoses connect to the radiator. Check for cracks, bulges, or loose clamps. These are relatively easy to replace.
* Thermostat Housing: The thermostat housing sits near the top of the engine and can crack or develop leaks.
* Engine Block Crack (Less Likely): While less common, a crack in the engine block itself can cause antifreeze to leak, though this would likely be accompanied by other more serious symptoms.
* Heater Core Hose (Less Likely - but could contribute): While usually associated with leaks inside the cabin, a severe leak in a heater core hose *could* contribute to a front-end antifreeze leak.
What to do:
1. Safety First: Let the engine cool completely before attempting any inspection. Antifreeze is toxic.
2. Visual Inspection: Carefully examine all the components listed above, looking for wet spots, stains, or trails of antifreeze. A flashlight can help.
3. Pressure Test: A radiator pressure test is the best way to diagnose a cooling system leak. This involves pressurizing the system and looking for pressure drops or leaks. A mechanic can perform this test.
4. Professional Help: If you're not comfortable performing your own repairs, take your Wrangler to a mechanic for diagnosis and repair.
Without a visual inspection, it's impossible to say for sure what's causing the leak. The above is a list of possibilities ranked roughly by likelihood.
