OPERATION CHASSIS continued (16.4.3) 2-93 WA420-3MC Problem Main causes Remedy Exhaust is white or blue Too much oil in oil pan Improper fuel Add or remove oil so level is as specified. See “12.1.2 CHECK BEFORE STARTING on page 2-37”. Change to specified fuel. Exhaust gas occasionally turns black Clogged air cleaner element Defective nozzle Defective compression Defective turbocharger Clean or replace, see “24.2 WHEN REQUIRED” on page 3-30.
( Replace nozzle.) ( See “Defective compression” above.) ( Inspect and clean or replace turbocharger.) Combustion noise occasionally makes abnormal (breathing) sound Defective nozzle ( Replace nozzle.) Abnormal noise generated (combustion or mechanical) Low grade fuel being used Overheating Damage inside muffler Excessive valve clearance Change to specified fuel. Refer to "Water temperature gauge is in red range" above. ( Replace muffler.) ( Adjust valve clearance.)