Tools needed to unscrew the spark plug and adjust the electrode gap
Measuring spark plug gap with wire gauge
Measuring spark plug gap with a feeler gauge
Proper functioning of spark plugs is one of the most important conditions for the efficient operation of the engine. It is essential that only the specified type of spark plugs be fitted to the engine. With a good engine, cleaning spark plugs is a rare operation.
All engines
Visual inspection of the working part of the spark plugs can show the condition of the engine. If the nose of the spark plug insulator is clean and white with no deposits, then the mixture is too lean. It also indicates that the spark plug is too hot, i.e. heat is slowly removed from the center electrode. If this is the case, then it is necessary to adjust the composition of the fuel mixture or replace the spark plug.
If the nose of the insulator is covered with a black coating, then this indicates that the mixture is too rich. If the plaque is black and oily, then this indicates engine wear and the need to check and repair it. If the nose of the insulator is covered with a light brown coating, then the mixture is optimal and the engine is in good condition.
The gap between the electrodes of a spark plug is of great importance, since too large and too small a gap changes the size of the spark, which leads to a decrease in engine efficiency. The gap must always comply with the technical requirements.
Gap check is carried out with a wire template (see fig. Measuring spark plug gap with wire gauge) or probe (see fig. Measuring spark plug gap with a feeler gauge). The gap is adjusted by bending the side electrode. In no case should the central electrode be bent, as this can lead to breakage of the insulator and failure of the candle.
To bend the side electrode of the candle, you must use a special tool (see fig. Tools needed to unscrew the spark plug and adjust the electrode gap).
Before installing the spark plug in the engine, check that the threads are clean and that all threads are intact.
Screw in the spark plugs by hand and then tighten them to the required torque.
Connect high voltage wires to spark plugs.
Engine 1.4-I
1. Using special pliers or tool HAZET 1849, remove the high voltage wire ends from the spark plugs.
2. Clean the spark plugs using a brush, vacuum cleaner or compressed air to prevent dirt from entering the engine cylinders after the spark plugs are removed. Unscrew the spark plugs using a spark plug wrench.
Engine 1.6-I
1. Using a screwdriver blade, remove the caps covering the nuts securing the upper engine cover. Unscrew the nuts and remove the upper engine cover (the arrows indicate the location of the screws (A) top cover fixings).
2. Using a screwdriver blade, remove the plugs covering the nuts securing the second engine shroud. Unscrew the nuts (arrows) and remove the second engine cover.
3. Using special pliers or tool HAZET 1849, remove the tips (arrows) high voltage wires with spark plugs.
4. Clean the spark plugs using a brush, vacuum cleaner or compressed air to prevent dirt from entering the engine cylinders after the spark plugs are removed. Unscrew the spark plugs using a spark plug wrench.
Engine 1.8-I
1. Unscrew nuts and remove the top casing of the engine.
2. unscrew the screws (1) fixing ignition coils (2).
3. Disconnect the electrical connectors from the ignition coils and remove the ignition coils from the spark plugs.
4. Clean the spark plugs using a brush, vacuum cleaner or compressed air to prevent dirt from entering the engine cylinders after the spark plugs are removed. Unscrew the spark plugs using a spark plug wrench.
Engines 2.3-I (5 cylinders)
1. Open the hood.
2. Mark the high voltage wires with numbers and remove the high voltage wire ends from the spark plugs.
3. Clean the spark plugs using a brush, vacuum cleaner or compressed air to prevent dirt from entering the engine cylinders after the spark plugs are removed. Unscrew the spark plugs using a spark plug wrench.
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