A spark plug is a device that, by passing a current through the contacts, ignites the vehicle's fuel. Basically, the resource of the candle is sufficient for a run of 30,000 km. However, there are times when you need to replace the candle much earlier than planned. It is one of the problems that a motorist can face during a replacement - a broken candle.
Instructions
Step 1
First, open the visible part of the candle. Then disconnect all contacts from the desired spark plug. Do this carefully, without sudden movements.
Step 2
Clean the candle location with a special device with a thin tube nozzle with compressed air. Do this carefully. There may be various types of dirt and deposits.
Step 3
Take a special torque wrench that allows you to adjust the applied force. An ordinary key will not work, since it does not allow a candle to enter the well. Each candle has a hexagon wrench. It is located approximately in the middle of the candle. The upper part of the candle breaks - a ribbed insulator with a contact rod inside and a contact (plug) nut located directly above the ceramic insulator.
Step 4
Place the key over the rest of the candle. With very smooth movements, begin to rotate it. Keep the head, extension and knob strictly along the axis of the candle. This should be done slowly and effortlessly. Under no circumstances try to achieve the result by force - you can rip off the thread that is located in the engine head, then you will have to repair it.
Step 5
Listen to the sound when twisting. If there is a grinding noise, this means that the candle is twisting out, and if there is a slight twist and the resistance has decreased, it is possible that the metal has melted and the next 15-20˚ can lead to thread stripping.
Step 6
Pour a solvent such as WD-40 into the candle socket. It will help flush out the candle thread for further unscrewing. Wait a while. Then rotate the candle in smooth movements alternately in different directions.
Step 7
Please note that all operations must be carried out on a cold engine, since the aluminum head expands more when heated than the candle, and therefore the latter can be clamped in the thread spirals.
