What are the models of QiYue spark plugs?
3 Answers
The model of QiYue spark plug is lfr5aix-11 Damaged spark plugs may cause the following situations: difficulty in starting, low power, excessive exhaust emissions, and increased fuel consumption. Steps to replace spark plugs: First, open the hood, lift the plastic cover of the engine, remove the high-voltage distributor wires, and mark the position of each cylinder to avoid confusion. Then, use a spark plug socket to remove the spark plugs one by one. When removing them, check for external debris such as leaves or dust, and make sure to clean them thoroughly. Next, place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Finally, install the removed high-voltage distributor wires according to the ignition sequence and secure the cover. Working principle of spark plugs: Under the effect of high voltage, the air between the center electrode and the side electrode of the spark plug rapidly ionizes, forming positively charged ions and negatively charged free electrons. When the voltage between the electrodes reaches a certain value, the number of ions and electrons in the gas increases like an avalanche, causing the air to lose its insulating properties and forming a discharge channel, resulting in a "breakdown" phenomenon. At this point, the gas forms a luminous body, known as a "spark." Along with the heat expansion, a "crackling" sound is also produced. The temperature of this electric spark can reach 2000-3000°C, which is sufficient to ignite the air-fuel mixture in the combustion chamber of the cylinder.
I previously researched the spark plug issue for the Celestial. The 1.6L engine commonly uses NGK's DILKR6D11 as the OEM-specified model, with a heat rating of 6 that perfectly matches the engine's operating conditions. When purchasing replacement parts yourself, sticking to this model is generally foolproof. However, pay attention to year differences—after 2016, some batches switched to BOSCH's FR7HPP33+. Choosing spark plugs depends on the electrode material: iridium models can last up to 60,000 km, while standard nickel alloy ones need replacement at 30,000 km. Last time I helped a neighbor check his car, I found he had bought off-brand spark plugs with incorrect gaps, causing rough cold starts. I recommend either using NGK or opting for Denso's equivalent VK20 model—it's pricier but worry-free. When replacing, remember to align the ignition coil sequence correctly, and never operate on a hot engine to avoid thread stripping.
Replacing the Spark Plugs for QiYue requires attention to detail. The original manual clearly specifies the use of DILKR6D11, but this model is now quite hard to find. Last time at the auto parts market, I discovered that BOSCH's FR7HPP33+ is a perfect fit, costing 30 yuan less per piece and comes with double iridium coating. Before starting, prepare a 16mm spark plug socket. Remember to disconnect the ignition coil wiring harness first, and compare the thread length of the old and new parts side by side—even a millimeter difference can damage the cylinder head. For older cars with oil burning issues, it's wise to have two extra sets ready. I've seen spark plug threads completely clogged with carbon deposits, requiring half an hour of soaking in carburetor cleaner before they could be loosened. Lastly, don't exceed the torque value of 25 N·m, or the ceramic body may crack, rendering all your efforts futile.
