Checking the glow plugs for conductivity is possible only after they have been removed. To check, you need a tester with a diode incandescent bulb. It is recommended to have the glow plugs checked by a workshop. Glow plugs are designed to preheat the combustion chambers and accompany the process of fuel ignition.
A defective glow plug leads to the fact that when starting a cold engine in cylinder chambers with serviceable spark plugs, the fuel mixture ignites immediately, and in a cylinder with a faulty spark plug, ignition occurs with a delay. A jerky engine and blue exhaust gases are strong evidence of a bad spark plug.
In order to provide access to the glow plugs, it is necessary to do some work.
Due to high temperatures, candles may burn out. Failure of spark plugs can be caused by defective injectors, improper fuel injection adjustment of the injection pump, or too low fuel injection pressure.
To remove the spark plugs, you need an overhead socket and a ratchet extension. To remove the candle, unscrew the nut on which the wire is attached, and then unscrew the candle itself.
Installation of candles is carried out in the reverse order. Candles are tightened with a torque of 20 Nm, and nuts with a wire - with a torque of 4 Nm.