TROUBLESHOOTING13-6 TNV IDI Service ManualQuick Reference Table For TroubleshootingMeasured Value and TroubleshootingWhen the measured compression pressure is below the limit value, inspect each part by referring to thetable below.QUICK REFERENCE TABLEFOR TROUBLESHOOTINGThe following table summarizes the general troublesymptoms and their causes. If any trouble symptomoccurs, take corrective action before it becomes aserious problem so as not to shorten the engineservice life.No. Item Cause Corrective Action1 Air Cleaner ElementClogged element Clean the element.Broken element Replace the element.Defect at element seal portion2 Valve Clearance Excessive or no clearance Adjust the valve clearance.3 Valve Timing Incorrect valve clearance Adjust the valve clearance.4 Cylinder Head Gasket Gas leak from gasketReplace the gasket.Retighten the cylinder head bolts to the specifiedtorque.5Intake / Exhaust Valve Sticking valve Replace the intake / exhaust valve.Valve SeatGas leak due to worn valve seator foreign matter trapped invalveLap the valve seat.6PistonGas leak due to scratching orwear Perform honing and use an oversized part.Piston RingCylinder
