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Solving common rail diesel problems

Supplier: Cost Effective Maintenance
11 January, 2012

The Common Rail Diesel (CRD) injection system is the most recent development to achieve ever more stringent diesel exhaust emission standards.

The injection system is however currently associated with widespread problems, including engine rattles, expensive injector failures, injector sticking, stalling problems and rapid piston and liner wear.

Problems have been documented across a wide range of engine suppliers, including Toyota, BMW, Volkswagen, Nissan and many more.

Cost Effective Maintenance have specifically developed the CRD Fuel Enhancer, to fix rattles, and provide smooth operation of fuel pumps and injectors. Used routinely, it will increase the service life of fuel systems and minimise the potential for the above problems.

The CRD system requires a significant increase in operating pressure compared to earlier systems. Fuel system pressures of up to (and above) 29,000 psi are required, and combined with ultrafine tolerances of diesel pumps and injectors, achieve superior fuel atomisation for cleaner combustion.

There are three factors that place significant additional stress on this system, compared to earlier diesel injection systems:

  1. The increased operating pressure causes higher loadings on equipment, which places a bigger demand on the fuel’s lubricating ability, than is required with earlier injection systems.
  2. The higher pressure also increases fuel temperatures. As a consequence, fuel degrades to form deposits.  Such deposits interfere with the fine tolerances, to cause sticking, malfunction and injector wear. This risk increases if using biodiesel blends, since biodiesel by nature, degrades faster.
  3. Diesel sulphur levels have been reduced, to reduce smoke emissions. However, sulphur provides lubrication, so lowering sulphur levels results in greater wear to very expensive fuel pumps and injectors .

CRD Fuel Enhancer provides strongly enhanced fuel lubricity, and superior deposit control for fuel pumps and injectors. While it’s recommended as a routine preventative step for CRD engines, it has been shown to eliminate severe injector rattle. It is suitable for all diesel engines.