2. Prepare tools and fixtures (see photo).
3. Before replacing the candles, it is necessary to purchase new candles of the recommended type, set the gap and screw them in instead of the old ones, replacing each candle separately. When purchasing candles, be guided by the data on the information plate under the hood (even if the data in the owner's manual contradict those on the plate).
4. Check the condition of the new spark plugs. If any signs of damage to the insulator are found, the candle cannot be installed.
5. Check the gap between the electrodes of the new spark plugs with a round gauge (see photo). The gap between the electrodes must correspond to that specified in the section «Technical data», or in the engine compartment plate. The probe should move in the gap between the electrodes under little effort. If the gap does not correspond to the norm, then bend the electrode using the lever on the body of the gauge set (see photo).
6. Turn the tip half a turn while applying upward force and remove the wire (see photo).
7. Pump around the spark plug to remove dirt.
8. Remove the spark plug by turning the wrench counterclockwise.
9. Regardless of whether the candle will change, or the old one will be wrapped, check the condition of the candle.
10. To wrap the candle without distortions, put a piece of hose with an inner diameter of 45 mm on the tip of the candle (see photo). As soon as the spark plug begins to twist with a warp, the hose will begin to scroll on the insulator, as a result of which damage to the threads is prevented. Tighten the spark plug to the specified torque.
11. Install the tip by turning it half a turn while applying downward force.
12. In the same order, replace the remaining candles.