Diesel engines are designed differently than petrol-powered ones. One of the most significant differences is that diesel engines use glow plugs (or glow plugs) in place of the spark plugs you can find in any gasoline engine. Spark plugs produce a spark that starts the combustion of the fuel so that the engine can run. Glow plugs rely on high compression ratios in order to increase the temperature of the air in the combustion chamber to the point of causing the fuel to self-ignite. To save money, here are some tips on how to replace the spark plugs on your diesel vehicle yourself.
Steps
Step 1. Locate the spark plugs in the engine hood
They are usually found on the engine head
Step 2. Remove the wires connected to the spark plugs
The cables will be underneath the engine valve cover. Each lead will have one end connected to a spark plug and the other connected to the engine. Disconnect the part of the wire connected to the spark plug. Remove the small nut that connects the lead to the spark plug using an appropriately sized wrench. At this point, pull the wire to separate it from the spark plug. Repeat the process to disconnect all spark plugs from the wires
Step 3. Gently remove the candles, one at a time
Loosen each candle using a ratchet
Step 4. Clean the wire ends and nuts
As with the terminals of a battery, the ends of the spark plug wires can become dirty over time, making current conduction less efficient
Step 5. Use a tap on each hole where the spark plugs used to sit
