1.1.11 Engine cooling problem 12 Compression pressure The gasket of cylinder head is worn. The piston ring is broken. Replace the gasket of cylinder head or piston ring 2. Air leak noise Exhaust pipe The connection of exhaust pipe is loose. The exhaust pipe is broken. Tighten the connection of exhaust pipe Replace the exhaust pipe Fuel injector and/or glow plug The fuel injector and/or glow plug are loose. Replace the gasket Tighten the fuel injector and/or glow plug Exhaust manifold The connection to exhaust manifold is loose. Tighten the connection to exhaust manifold Cylinder head gasket The cylinder head gasket is worn. Replace the cylinder head gasket 3.
Continuous noise Fan belt The fan belt is loose. Adjust the tightness of fan belt again. Cooling fan The cooling fan is loose. Retighten the cooling fan Water pump bearing The water pump bearing is worn or damaged. Replace the water pump bearing Alternator or vacuum pump The alternator or vacuum pump is broken. Repair or replace the alternator or vacuum pump Valve clearance The valve clearance is not proper. Adjust the valve clearance 4. Clapping noise Check Causes Remedies Valve clearance The valve clearance is not proper. Adjust the valve clearance Rocker arm The rocker arm is broken. Replace the rocker arm Flywheel The flywheel bolt is loose.
Retighten the flywheel bolt Crankshaft and thrust bearing The crankshaft and/or thrust bearing is worn or damaged. Replace the crankshaft and/or thrust bearing Crankshaft and connecting rod bearing The crankshaft and/or connecting rod bearing is worn or damaged. Replace the crankshaft and/or connecting rod bearing Connecting rod bushing and piston pin The connecting rod bushing and piston pin are worn or damaged. Replace the connecting rod bushing and/or piston pin Piston and cylinder liner The piston and cylinder liner is worn or damaged. Replace the piston and cylinder liner Check Causes Remedies Engine overheating The coolant level is too low.
Fill in the coolant The thermostatic control is broken. Replace the thermostatic control The thermostat is broken. Replace the thermostat