. OPERATION TROUBLESHOOTING 3 - 154 Problem Main causes Remedy Fuel stops from time to time Crushed fuel tank breather tube ( Replace breather tube) Excessive oil consumption Exhaust gas is white or bluish Oil leakage ( Check, repair) Excessive oil in oil pan Add oil to specified level. See CHECK BEFORE STARTING. Worn piston, ring, cylinder liner ( Replace) Improper fuel Replace with specified fuel Defective turbocharger ( Check, replace) Exhaust gas is black Clogged air cleaner element Clean or replace. See WHEN REQUIRED. Compression insufficient Valve clearance not adequate Piston, piston ring or cylinder liner worn out See "Valve Clearance Adjustment" above.
( Check, repair) Nozzle defective ( Nozzle replacement) Defective turbochaeger ( Check, replace) Engine hunts Air entering suction side of fuel line ( Repair place where air is leaking in) Combustion noise ocaasionally makes breathing sound Defecyive nozzle ( Replace nozzle) There is strange noise (combustion or mechanical) Poor quality fuel being used Replace with specified fuel Overheating See "Water temperature gauge is in red range" above. Valve clearance in excess ( Valve clearance adjustment)