I’m leaking coolant from my radiator cap.

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! If you're leaking coolant from the radiator cap on your 2018 Ram 1500, even after replacing the cap, it could point to excess pressure building up in the cooling system. This might happen if the radiator itself is clogged or there’s an issue with the head gasket causing combustion gases to enter the coolant. The K-seal you’re trying to use is a temporary fix, but if the cap can't hold the pressure, you’ll need to check for underlying issues. A pressure test on the cooling system can help reveal what's causing the leak. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.