The complexity of the replacement of the candles depends on the design of the engine. In some cases, some kind of overhanging equipment has to be dismantled to get to the candlelight. If each of the candles is equipped with a separate coil, the coils must be disconnected first. They are usually bolts. If the engine is diesel, naturally, there are no spark plugs.
The candles are installed in the light wells, so they can be reached only by the head. It is desirable that the head be magnetized.
As a rule, the candles are curled, so they need to be reduced with effort. You don't have to do that with these fish moves, because the candle can burst and break in. In this case it will be very difficult to extract it. It is necessary to finish the new candles with the effort recommended by the manufacturer. If you overturn it with effort, you can damage the threads in the engine, which will lead to expensive repairs.
When replacing the candles, it is worth drawing attention to the purity of the candle wells. The presence of oil may indicate a need to replace the laying of the valve cover.
