TROUBLESHOOTING 3.15.4.5 ENGINE 140 TROUBLE CAUSE REMEDY Oil pressure warning light remains on even with engine at high speed: • Oil level in oil pan too lo. • Oil filter clogged. • Oil unsuitable for the season. • Top up. • Change filter. • Change. Steam comes out of radiator breather pipe: • Fluid level low, fluid leakages. • Fan belt slackened. • Mud or limestone accumulated in cooling system. • Radiator fins damaged or closed. • Faulty thermostat. • Radiator cap loose or broken. Work- ing at considerable altitude. • Top up, repair. • Check belt tension. • Change fluid and clean cooling sys- tem. • Repair or clean. (•) Change. • Tighten cap or change unit.
Temperature indicator always on the right end of the scale: • Faulty temperature indicator. (•) Change. Temperature indicator pointer always on the left end of the scale: • Faulty thermostat. • Faulty indicator. (•) Change. (•) Change. Engine does not start with starter run- ning: • No fuel. • Air in fuel system. • Compression defect (valves with wrong clearance). • Refuel. • Bleed system. (•) Adjust valve clearance. Exhaust gases white or light blue: • Too much oil in oil pan. • Unsuitable fuel. • Correct oil level. • Change with suitable fuel. Exhaust gases occasionally tend to be black: • Air cleaner clogged. • Faulty injectors. • Faulty compression. • Clean or change. (•) Change.
(•) Adjust valve clearance. Combustion noise occasionally resem- bles a blow: • Faulty injectors. (•) Change. Abnormal noises (during combustion or in mechanical parts): • Fuel with low cetane rating. • Overheating. • Exhaust silencer inside damaged. • Excessive valve clearance. • Change with fuel in compliance with standards. • See “defects of temperature indica- tor”. (•) Change. (•) Adjust valve clearance.