Joyner JNSZ1600DL, Руководство пользователя

Страница: 90 / 138

99
(2). Whistle noise:
Cause Correction
a. Intake manifold sealing gasket leaks Replace sealing gasket or tighten bolts
b. Exhaust manifold sealing gasket leaks or Replace sealing gasket or tighten bolts exhaust pipe
sealing gasket leaks
c. Vacuum hose leaks Replace
d. Cylinder head gasket burned badly Check and replace
(3). Knocking or spanking noise
Cause Correction
a. Hydraulic valve lifter works abnormally Check and replace
b. Valve mechanism or camshaft worn out Check and service
c. Timing belt or tension pulley worn out Replace
d. Abnormal accessories ie. alternator or water pump Check, service and replace
(4). Knocking or hammering noise.
Cause Correction
a. Connecting rod bushing worn out (generally severe Check and service knocking, may be relieved
under load.)
b. Main bearing half shell worn out (booming or Check and service knocking noise, may be relieved
under load)
c. Piston knocking (apparent with engine cold) Check and service
d. Alternator or water pump accessories damaged Check and service
17. Engine is overheated.
Cause Correction
(1). No sufficient coolant in the cooling system Add coolant
(2). Thermostat damaged Replace
(3). Radiator core blocked or air inlet cogged Clean or replace radiator
(4). Radiator electrical fan or coolant temperature Check, service and replace sensor abnormal
(5). Expansion tank pressure cap damaged Replace
(6). Water pump leaks or damaged Service or replace
(7). Ignition timing too late Adjust ignition tim
ing
(8). Air exists in cooling system Bleeding the air
(9). Too lean mixture Adjust carburetor