16. TROUBLESHOOTING ENGINE (continued) (16.4.4) 2-117 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 ‡ Excessive oil in oil pan ‡ Worn piston, ring, cylinder liner ‡ Improper fuel ‡ Defective turbocharger seal (‡ Check, repair) ‡ Add oil to specified level. See CHECK BEFORE STARTING. (‡ Replace) ‡ Replace with specified fuel (‡ Check, replace) Exhaust gas is black ‡ Clogged air cleaner element ‡ Worn piston, ring, cylinder liner ‡ Defective compression ‡ Defective turbocharger ‡ Defective exchaust brake ‡ Clean or replace. See WHEN REQUIRED.
(‡ Check, repair) ‡ See adjustment of clearance above (‡ Check, replace) (‡ Check, replace, repair) Engine hunts ‡ Air entering suction side of fuel line (‡ Repair place where air is leak- ing in) There is knocking (combustion or mechanical) ‡ Poor quality fuel being used ‡ Overheating ‡ Replace with specified fuel ‡ See “Water temperature gauge is in red range” above.