Glow plugs are used to help start diesel engines, particularly when cold. Petrol engines use spark plugs to ignite combustion, but diesel engines rely on pressure from the piston in the cylinder to compress the air and cause the temperature to rise. Then when a fine mist of diesel is sprayed in to the cylinder it spontaneously combusts. However, if the overall temperature of the engine and air is cold tis can be harder to achieve. Glow-plugs solve this problem by using a heating element to raise the temperature of the engine cylinder, so that self combustion can occur within the diesel engine. To look up the correct glow plug for your vehicle just enter your make and model in the drop down boxes or use your registration for the most accurate results.
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