Posts Tagged: engine overheating
What Causes a Car to Overheat? Common Causes
What Causes Your Car to Overheat — Advice from a Pro Quick Summary Overheating is almost always the result of a breakdown in airflow, coolant flow, or heat transfer. A radiator that “looks fine” can still fail under load if airflow is restricted, coolant circulation is compromised, or ambient conditions overwhelm the system. So, understanding what causes your car to overheat means you need to understand thermal management—not just guess and replace parts. Article Car Overheating Isn’t a Mystery—It’s Physics Over the years, I’ve diagnosed countless overheating complaints, and one … Read More
Engine Overheating Causes You’re Probably Missing
The Real Causes of Engine Overheating Explained Quick Summary When an engine overheats, the root cause almost always falls into one of four categories: 1) Coolant level or flow problems 2) Airflow issues 3) Heat transfer failures 4) System pressure loss. The pattern of engine overheating—whether it happens at idle, under load, or both—is the fastest way to narrow it down. • If the engine overheats at idle, I immediately suspect low coolant levels or airflow problems, such as inoperative cooling fans or a restricted radiator (clogged fins). • If … Read More
How to Fix a Leaking Coolant Reservoir
How to Fix a Leaking Coolant Reservoir Before It Leads to Engine Damage Quick Summary If you need to fix a leaking coolant reservoir, the first step is to determine whether your vehicle uses a pressurized or non-pressurized reservoir. That single detail determines whether the reservoir can be safely repaired or must be replaced. In my experience, most late-model vehicles have pressurized coolant reservoirs that should always be replaced if they’re cracked. While plastic welding can sometimes repair a non-pressurized overflow tank, glues, epoxies, RTV silicone, and tape are only … Read More
Top Causes of Engine Overheating and How to Fix Them
Engine Overheating: The Most Common Causes and How I Diagnose Them Quick Summary Engine overheating is usually caused by a cooling system problem—not a failed engine. Low coolant, a stuck thermostat, a bad radiator fan, a clogged radiator, a worn water pump, or a leaking head gasket are responsible for most overheating complaints. The key is to diagnose the cause early, before severe engine damage occurs. Engine Overheating: Don’t Assume the Worst When I diagnose engine overheating, I never jump to conclusions. After decades of working on cooling systems, I’ve … Read More