What are engine valves: how to prevent them from burning

Engine valves are critical components of your car’s internal combustion power unit, being responsible for allowing the fuel-air mixture to enter the combustion chamber and allow exhaust gases to exit the combustion chamber.

The valves are controlled by the camshaft, synchronized with the engine’s crankshaft. What you should know is that there are two main types of them: intake and exhaust valves. The intake ones open to let the air-fuel mixture into the combustion chamber, while the exhaust ones open to let exhaust gases out of the chamber.

These parts must open and close at the correct time and with precise duration for the engine to function optimally. Remember that they are subjected to high temperatures and extreme pressures, being prone to wear or premature failure.

For this reason, it is important to keep them in good condition through regular maintenance, to avoid, among other things, burning. Given this, we show you the causes that lead to this problem.

lack of oil

Oil is essential to lubricate the valves. If not changed in time, this dirty old viscous fluid will not provide good lubrication, causing excessive wear and causing burnout. We recommend that you replace the oil every 5,000 to 7,500 kilometers, or according to the manufacturer’s recommendations.

poor fuel quality

The use of low quality fuel leaves residue on the valves and in the combustion chamber, contributing significantly to burning. Use quality gasoline or diesel and avoid adulterated blends.

Bad cooling system

Vital to keep the engine temperature stable and everything under control. Overheating can cause the valves to burn out. To avoid this, check that the cooling system is in good condition and that the fluid is changed according to the manufacturer’s recommendations.

insufficient maintenance

Regular maintenance is vital for everything. Cars do not escape this, because being machines, you have to be aware at all times. The same thing happens with the engine. Now, regarding the valves, make sure they fit, open, and close properly.

Avoid overrevs

Over-revving the engine can cause the valves to burn. Be vigilant, avoid driving at high revs for long periods and shift gears on time.

cold start

Cold starting is also listed as one of the options that can cause valve fire, so allow your car’s power unit to warm up before driving, while still revving the engine while it’s cold.