Mechanic's Viral Video Reveals Hidden 'Pressure Cooker' in Your Car

Car Maintenance Tip: Understanding Your Coolant System's Pressure Cap Sevilla, Spain – May 29, 2025 – A recent video by Talleres Ebenezer, a mechanic in Seville, Spain, highlights a crucial aspect of car maintenance often overlooked by drivers: the pressure cap on the coolant reservoir. The video, which has garnered over 11,000 views in just a few hours, uses the simple analogy of a pressure cooker to explain how this seemingly small part plays a vital role in preventing engine overheating. "Did you know that all cars and motorcycles with combustion engines have a built-in pressure cooker?" Ebenezer explains in the video, pointing to the pressure cap on a Volvo's coolant reservoir. He demonstrates how the pressure rating (145 kPa in this case) ensures the coolant remains liquid even at high temperatures, preventing boiling and potential engine damage. He warns against opening the cap on a hot engine, emphasizing the danger of scalding from the pressurized, high-temperature coolant. Ebenezer's clear and concise explanation provides valuable insights into a critical component of vehicle maintenance. The video serves as a reminder of the importance of regular car checks and safe practices when dealing with hot engine components. The video's popularity suggests a significant number of drivers may benefit from this simple yet crucial piece of knowledge.