To remove the spark plugs from the engine you must first remove theCap with the electricalConnection.
At this point, unscrew them from the head with the appropriate key.
Check the state of the electrode and itsColor.
If the electrode is very black and dirty, the engine probably eats oil or is badlyCarburized.
If, on the other hand, the electrode is dry and whitish, the carburetion is probably too "lean"
The right color is slightly amber gray-light brown.
Check the electrode gap by eye. If you are equipped with a thickness gauge,Check that the distance is between 0.6 and 0.8 mm
Diesel, glow plugs
Cars equipped with diesel engines have electric resistances that heat the air-diesel mixture in the preheating chambers and not the common spark plugs used for petrol engines.
The temperature of the mixture must in fact reach about 800 °C before entering theCombustionChamber.