ENGINE 72 c) Oil Cooler : 01 Oil passage into Filter 02 Passage of filtered oil into Block Oil cooler is heat exchanger which uses coolant to reduce the temperature of oil coming from the oil pump. It is mounted on the oil filter bracket. NOTE For other details refer overhauling procedure for oil pump in engine section. d) Hydraulic Lash Adjuster (HLA) : Hydraulic Lash Adjuster supports the pivot end of the rocker arm while automatically controlling the rocker arm position to keep it in contact with the camshafts and valve. The range of the hydraulic lash adjuster accommodates engine build tolerances; hence no adjustment is required during engine assembly. At all engine working conditions it maintains zero clearance between rollers rockers and valve stem. MAINTENANCE Hydraulic lash adjuster uses Engine oil pressure for its operation. In case of a freshly assembled Engine, do not run for a long time; there are chances of valve train noise / tappet noise appearing when the engine is started. HLA noise can be heard as repeated tappet like noise when engine is running at low idle speed. Following procedure is recommended to eliminate the noise. Raise the Engine speed to 500rpm without load (Vehicle stationary) to bleed the hydraulic chamber of HLA. The noise should disappear in15-30 seconds. If the noise still persists, run the engine further under same condition (no load at 500 RPM) for several minutes. The noise should disappear in 3 to 30 mins, in few cases.
RkJQdWJsaXNoZXIy MTIwNTUz