How Often Should the Spark Plugs on a Geely Emgrand Be Replaced?

[DamianDella]

Geely Emgrand spark plugs should be replaced every 80,000 kilometers. Methods to determine if spark plugs are damaged: Remove the spark plugs and observe them. The condition of the spark plugs can be judged based on their appearance and color. Normal spark plugs have a skirt insulator and electrodes that appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has a skirt insulator that is reddish-brown, with an electrode gap between 0.8-0.9mm and no signs of electrode burning. If the spark plugs are covered in oil or deposits but are not damaged, they can continue to be used after cleaning off the oil and deposits. If the spark plugs are severely damaged, showing signs such as blistering at the top, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plugs with new ones. Additionally, if the spark plugs appear black as if smoked, it indicates that the wrong heat range was selected or that the air-fuel mixture is too rich, with oil seeping up.

[Lois]

I've been driving a Geely Emgrand for five years. The maintenance manual recommends replacing the spark plugs every 30,000 kilometers. However, this isn't a hard and fast rule—it actually depends on driving habits. I mainly use the car for commuting in the city with heavy traffic, where the engine often runs at low RPM, accelerating carbon buildup on the spark plugs. During the last maintenance at 20,000 kilometers, the repair shop used an endoscope to inspect them and found the electrode gap exceeded the limit. The mechanic warned that continuing to use them could damage the ignition coils, so I replaced them early. Now, I've switched to iridium spark plugs, which have better conductivity and a lifespan extended to 60,000 kilometers. Still, I check their erosion every time I change the oil.

[LeBlakely]

The Emgrand comes with standard nickel alloy spark plugs from the factory, which have a lifespan of 30,000 to 40,000 kilometers. I've noticed that frequent highway driving causes slower wear, while repeated short-distance city driving with frequent starts actually accelerates deterioration. When my car reached 40,000 km last time, it experienced shaking during cold starts and power loss. The mechanic found cracks in the ceramic bodies of three spark plugs upon removal. The technician explained that the Emgrand's 1.5L engine has a high compression ratio, and changes in electrode gap affect air-fuel mixture combustion efficiency. Delaying replacement could lead to over 10% increase in fuel consumption. Now I proactively replace them every two years or 30,000 km - much more cost-effective than repairing the ignition system later.

[SanMadison]

I learned my lesson about changing spark plugs on the Emgrand. Last time, the 4S technician said the factory recommended replacement at 30,000 km, but I didn't take it seriously. As a result, when I reached 50,000 km, the engine malfunction light came on. The diagnosis showed that two cylinder ignition coils were burnt, and the spark plug electrodes were completely fused together, costing over 700 yuan to repair. The manual actually specifies different replacement intervals: standard nickel alloy spark plugs should be changed at 30,000 km, while upgraded platinum ones can last up to 60,000 km. My advice is to check the gap during every minor maintenance service. If you notice the metal electrode rounding off or the ceramic body turning black, replace them immediately—don't just rely on mileage.

[McFelicity]

I drive a 2019 Emgrand, and the maintenance records show that the spark plug replacement cycle is significantly affected by road conditions. If you frequently start and stop in the city, carbon deposits may occur as early as 20,000 kilometers. Last time, when I accelerated sharply, the engine felt like it was coughing and jerking. The auto repair shop checked and said it was due to poor spark plug ignition. The mechanic taught me a simple way to check: listen to the sound when starting the car cold—if it takes two seconds longer than usual to start, it’s probably nearing the end of its lifespan. Now, after discussing with other Emgrand owners in my neighborhood, most people replace them at 30,000 kilometers, and using NGK iridium-platinum spark plugs can extend that to 80,000 kilometers.

[DelSadie]

Emgrand owners, pay attention to spark plug maintenance is crucial. The standard ones that come with the car last about 30,000 kilometers, but if you often drive on muddy roads or in humid environments, electrode oxidation will occur faster. I once experienced difficulty starting the engine on a rainy day, and upon inspection, found cracks in the ceramic body. The mechanic said this was caused by thermal cycling due to moisture. Now, I always have the maintenance shop check the resistance value, which should normally be between 4-6 kilo-ohms. Replace them promptly if they're out of range, unlike my neighbor who waited until the spark plug melted and damaged the piston, costing over 3,000 yuan to repair the engine. Also, if you upgrade to a high-power ignition coil, remember to match it with higher-spec spark plugs.