Oil Flush : When the crankcase on an engine gets dirty from lack of oil changes, an oil flush may be the answer. An oil flush helps remove sludge deposits from inside the engine that restrict the engines vital oil pressure or oil volume. Timing chain or hydraulic valve lifters may make a rattle as an early sign of an oil flush being needed. Oil flushes can be as simple as running special chemicals through the engine to break up the oil deposits and sludge or can be more complex requiring removal of the engine covers and oil pan to properly clean the crankcase. Check out Guy’s Automotive for any oil flush concerns you may have.