Suzuki SY413 Service Manual page 2598

6-22 ENGINE (ENGINE WITHOUT WU TWC)
Condition
Overheating
Poor gasoline mileage
Excessive engine oil
consumption
Possible Cause
D Inoperative thermostat
D Poor water pump performance
D Clogged or leaky radiator
D Improper engine oil grade
D Clogged oil filter or oil strainer
D Poor oil pump performance
D Faulty radiator fan control system
D Dragging brakes
D Slipping clutch
D Blown cylinder head gasket
Ignition system out of order.
D Faulty spark plug (improper gap, heavy
deposits, and burned electrodes, etc..)
Electronic Fuel Injection system out of
order.
Low compression
Others
D Poor valve seating
D Dragging brakes
D Slipping clutch
D Thermostat out of order
D Improper tire pressure
D Malfunctioning EGR valve
Oil leakage
D Blown cylinder head gasket
D Leaky crankshaft pulley oil seal
Oil entering combustion chamber
D Sticky piston ring
D Worn piston and cylinder
D Worn piston ring groove and ring
D Improper location of piston ring gap
D Worn or damaged valve stem seal
D Worn valve stem
Referring Item
Thermostat in Section 6B.
Water pump in Section 6B.
Radiator in Section 6B.
Engine oil and oil filter change in Sec-
tion 0B.
Oil pressure check in Section 6A3.
Oil pressure check in Section 6A3.
Diagnostic Flow Chart B-8 in Section
6E3.
Trouble diagnosis in Section 5.
Trouble diagnosis in Section 7C1.
Cylinder head in Section 6A3.
Spark plugs in Section 6F2.
Trouble diagnosis in Section 6E3.
Previously outlined.
Valves inspection in Section 6A3.
Trouble diagnosis in Section 5.
Trouble diagnosis in Section 7C.
Thermostat in Section 6B.
Refer to Section 3F.
EGR system inspection in Section 6E3.
Cylinder head in Section 6A3.
Crankshaft in Section 6A3.
Piston cleaning in Section 6A3.
Pistons and cylinders inspection in Sec-
tion 6A3.
Pistons inspection in Section 6A3.
Pistons assembly in Section 6A3.
Valves removal and installation in Sec-
tion 6A3.
Valves inspection in Section 6A3.