Diesel Parts
For an efficient & reliable diesel engine, key components are reqiuired to operate at their optimum level
In a diesel engine air is fed into the cylinders where it is compressed and diesel fuel is then injected directly into the combustion chamber (direct injection). Because air heats up when it's compressed, it ignites the diesel fuel which continues the combustion process revolving the engine. The compression of the air and fuel is critical and engine wear and/or leaks will have a detrimental effect on the engine’s operation.
The diesel pump is calibrated to deliver an exact measure of diesel fuel critical to this process. It is fed through diesel injectors into the engine at the precise moment for the compression cycle of the cylinders. Many diesel engined car fuel systems require this calibrated fuel to run at very high pressure and, if not maintained, the pump and injectors can leak creating significant efficiency problems.
To aid the engine starting, especially in cold temperatures, glow plugs help the ignition of the diesel fuel. Over time, through many cycles of starting, these can break down and it becomes more difficult to start the engine.
To match or surpass their equivalent sized petrol engined counterparts, many diesel engines utilise a turbocharger. This can significantly boost an engine's horsepower without significantly increasing its weight: a huge benefit that makes turbos so popular a fitment!
Diesel Pumps
An Injection Pump is the device that pumps fuel into the cylinders of a diesel engine. Traditionally, it is driven by gears, chains or a toothed belt from the rotation of the engines cylinders. In some systems injection pressures can be as high as 200 MPa (30,000 PSI).
Diesel injection pumps are very complex components that require a high technical knowledge and knowhow to check, test or repair correctly. Our Master Technicians are trained to recondition all makes of fuel injection pump.
Diesel Injectors
The modern diesel engine relies heavily on the injectors. Controlled by the ECU they are required to deliver fuel at specific times during the piston stroke at extremely high pressure. Injectors have a serviceable life and once this has been reached it is important to recondition them to high standards. We have invested in the latest diesel injector test benches from both OE and aftermarket companies to give ourselves a wide range of testing capabilities. All injectors are stripped, ultrasonic cleaned and rebuilt. We replace internal parts to return the injector to a “like new” product
Glow plugs
Most diesel engines contain a glow plug. When a diesel engine is cold, the compression process may not raise the air to a high enough temperature to ignite the fuel. The glow plug is an electrically heated wire (think of the hot wires you see in a toaster) that heats the combustion chambers and raises the air temperature when the engine is cold so that the engine can start.
Turbochargers
Exhaust gasses expelled from the engine combustion chamber are fed past a turbine that is joined by another in parallel. This is used to compress air flowing into the engine. The advantage of compressing the air is that it lets the engine squeeze more air into a cylinder, and more air means that more fuel can be added. Therefore, you get more power from each explosion in each cylinder. A turbocharged engine produces more power overall than the same engine without the charging.
The turbine in the turbocharger spins at speeds of up to 150,000 rotations per minute (rpm) - that's about 30 times faster than most car engines can go. And since it is hooked up to the exhaust, the temperatures in the turbine are also very high.