| SYMPTOM/DIAGNOSIS | SUSPECT AREA/PARTS | ACTION/REMEDY |
| Lower engine noise regardless of engine speed. | 1)Low oil pressure 2)Deform oil pan,contacting the oil pump strainer. 3)Excessive piston to cylinder bore clearance. 4)Excessive conrod bearing clearance. 5)Excessive crankshaft bearing clearance. 6)Incorrect piston,piston pin & connecting rod installation. | 1)Replace oil pump if necessary 2)Inspect the oil pan,Inspect the oil pump screen, & Repair or Replace. 3)Inspect & replace if necessary. 4)Inspect the following component &repair as required. =the connecting rod bearing. =The connecting rods. =crankshaft pin journal. 5)Inspect the following component & repair as required. =Crankshaft bearing. =Crankshaft main journals.Cylinder block. 6)Verify the piston pins & connecting rod installed correctly,Repair as required. |
| Engine noise underload. | 1)Low oil pressure. 2)Excessive connecting rod clearance. 3)Excessive crankshaft bearing clearance. | 1)Inspect oil passages,repair & replace oil pump if necessary. 2)Inspect the following component,connecting rod bearing, connecting rod& crankshaft. 3)Inspect the following component repair or replace as required. =Crankshaft bearing. =Crankshaft main journals. =Cylinder block. |
| Engine will not crank-crankshaft will not rotate. | 1)Hydraulically locked cylinder. =Coolant/antifreeze in cylinder. =Oil on cylinder. =fuel in cylinder. 2)Broken timing chain or chain gear. 3)Materials on cylinder. =Broken valve. =Broken piston. | 1)Removed the sparkplug & check for fluid. 2)Inspect for broken head gasket. 3)Inspect for cracked engine block or cylinder head. 4)Inspect for a sticking fuel injector. 1)Inspect the timing chain &gear repair or replace as required. 1)Inspect component and repair and replace parts defective. |
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