B. ENGINE ASSEMBLY I. ASSEMBLY OF CYLINDER BLOCK SUBASSEMBLIES 1. Check cylinder block for cracks by pressure testing method. Clean cylinder bores, bearing surfaces, oil passages in crank case thoroughly. Check water jackets for leakages by blowing air at a pressure of 5 bar & then dipping the cylinder block in the hot water. (Temp of water 700 to 800 C) 2. Check crankcase mating surfaces with cylinder head for unevenness with the help of straight edge and feeler gauge. If necessary grind this surface just to clear unevenness. Measure across the length and breadth to specific mention value in table. 3. Ensure main bearing parent bore dimensions are within specified limits. (For specified limit and procedure refer cylinder block inspection chapter.) 4. Ensure that the minimum height of crank case is not less than the specified minimum height. 5. Fit the piston cooling nozzle to the crankcase. Use new gasket when refitting the cooling nozzle. 6. Match the lug of thrust washer with block. Insert the thrust washers from 3rd bearing from 7. cylinder block and place the upper bearing shell. (Apply the coat of engine oil.) NOTE The block with any leakages / cracks should • be discarded. NOTE Apply light coat of grease to the fourth main • bearing cap. Ensure the slot on thrust washers are facing • on outer side. NOTE Apply light coat of engine oil to all main • bearing shells and crankshaft journals. Ensure crankshaft holes are properly • cleaned and free from any blockages. Petrol Engine Ph-2 (CAFÉ)_DCT 141
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