How many kilometers should the spark plugs of Changan CS35 be replaced?
3 Answers
Changan CS35 spark plugs should be replaced every 50,000 to 70,000 kilometers. The replacement steps are: 1. Prepare tools; 2. Unscrew the high-voltage wire terminal; 3. Remove the spark plug; 4. Install the new spark plug. The function of the spark plug is to introduce the high-voltage electricity generated by the ignition coil into the engine cylinder, generating a spark between the spark plug electrodes to ignite the air-fuel mixture, enabling the engine to operate. Taking the 2017 Changan CS35 as an example, it is a compact SUV with body dimensions of: length 4170mm, width 1810mm, height 1670mm, wheelbase of 2560mm, fuel tank capacity of 52 liters, and curb weight of 1270kg.
I've been driving the Changan CS35 for almost four years now, mainly for daily commuting to work and weekend outings. I've always followed the 30,000-kilometer standard for spark plug replacement, as recommended in the manufacturer's manual. Last time, when I delayed it to 33,000 kilometers, I noticed the car had some difficulty starting and the acceleration wasn't as smooth. A check at the repair shop revealed worn spark plug electrodes. The mechanic said prolonged neglect could lead to uneven ignition, engine vibration, and increased fuel consumption. I'd advise CS35 owners to check spark plug gaps and carbon buildup during routine maintenance. If you frequently drive in congested urban areas, spark plugs wear out faster, and you might need to consider replacing them at around 25,000 kilometers. Don't underestimate this small component—it significantly impacts the overall driving experience. After replacement, acceleration becomes noticeably smoother, and fuel consumption stabilizes. DIY replacement isn't difficult, but be sure to use genuine parts and avoid cheap knockoffs. Also, handle the wiring harness carefully during installation to prevent short circuits.
For frequent car users, the replacement interval for spark plugs depends on their material. The original spark plugs in the Changan CS35 are mostly standard copper-core types, which typically need replacement every 20,000 to 30,000 kilometers. If you opt for higher-grade iridium or platinum spark plugs, their lifespan can exceed 50,000 kilometers, though at a slightly higher cost. Before replacement, remove the spark plugs to check for severe electrode wear or excessive carbon buildup, as these can affect ignition efficiency, leading to engine stalling or sluggish acceleration. I recommend inspecting them every two years or 25,000 kilometers—don’t wait until the car shakes or struggles to start. When installing new spark plugs, use a torque wrench to ensure proper tightness and correct gap spacing to avoid issues. Additionally, spark plug condition impacts exhaust emissions; delaying replacement might cause non-compliance with environmental standards, a point often overlooked.
