What is the reason for abnormal noise in Accord cars?
3 Answers
Abnormal noise in Accord cars is caused by poor valve lubrication or excessive clearance. When the engine is running, listen carefully to the noise to identify its location. Try inserting a feeler gauge into the valve clearance. If the noise decreases or disappears, it indicates excessive valve clearance. In this case, the valve clearance should be adjusted as needed. During adjustment, the influence of temperature should be considered, as the temperature of the valve rocker arm and valve stem affects the valve clearance. When the engine is hot, the valve clearance is smaller than when the engine is cold. Some cars require adjustment when the engine is cold, while others can be adjusted when hot, with different clearance values. The adjusted valve should be fully closed to ensure the accuracy of the adjusted clearance value. The valve clearance of each cylinder should be adjusted consistently to avoid engine imbalance during operation. If the valve is poorly lubricated, it can cause wear and pits. In severe cases, the end of the valve stem may get stuck in the pit, and the rocker arm may break. Therefore, repairs or replacement of new parts should be carried out based on the wear condition to avoid affecting adjustment accuracy.
I used to drive an Accord that also had strange noises, so I’ll share some personal experience. The most common issue is aging suspension components—worn shock absorber rubber bushings can cause constant thumping noises over speed bumps. Another culprit is a loose engine belt, which squeals during cold starts and really ruins your music-listening experience. Worn brake pads can also produce sharp screeching, especially when braking. Additionally, unbalanced or unevenly worn tires create a buzzing noise at high speeds, like a fly circling your head. My advice: don’t ignore these sounds—get them checked promptly. I once fixed minor issues just by tightening a few chassis bolts, avoiding costly major repairs down the road.
Diagnosing abnormal noises requires some skill, and identifying the source is the most reliable method. A knocking sound from the suspension area is likely due to loose ball joints or control arms; a humming noise from the tires suggests imbalance, which can be improved with a wheel alignment. Engine noises like clicking may indicate excessive valve clearance or insufficient belt tension; squeaking from the brake system means the pads are worn. The Accord's CVT transmission normally makes a rattling sound at low speeds, but if the frequency increases, it's time to be cautious. Checking is simple: find a quiet place to drive slowly and locate the source of the noise by listening carefully, avoiding unnecessary part replacements and wasted money.
