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SATURDAY, 17 OCTOBER 2009
Water in the fuel?
Modern injectors have become very sophisticated and have many more internal parts than ever. They rely on diesel for their lubrication. A vast number of failures seem to be caused either by abrasion of the internal parts due to a lack of lubricity or due to the build up of ‘sticky’ deposits on the working parts, notably the nozzle needles and flow valves.
Diesel storage tanks (especially your vehicle’s fuel tank) haven’t changed over the years and condensation is an ongoing problem. Condensation occurs when hot fuel is returned to the cool, breathable (access to the atmosphere) fuel tank. This results in air containing moisture being drawn into the tank. Fuel filters are meant to remove the water from the fuel however we see an awful lot of injectors with rusty innards and in the worst cases, nozzle tips being blown off. Water in the fuel also robs the diesel of its lubricity leading again to excessive wear.
In the good old days when an injector developed a fault, the engine would splutter and miss. Now with higher pressures and lower tolerances injectors tend to ‘fail’ rather more problematically, sometimes resulting in extensive engine damage.
Posted by KEITH DA COSTA at 09:22 | POST A COMMENT
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