Suzuki 2006 SX4, Service Manual

Page: 94 / 1478

1A-50 Engine General Information and Diagnosis:
Engine noise – Piston,
ring and cylinder noise
NOTE
Before checking
mechanical noise, make
sure that:
• Specified spark plug is
used.
• Specified fuel is used.
Worn piston, ring and cylinder bore “Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning in Section
1D”
Engine noise –
Connecting rod noise
NOTE
Before checking
mechanical noise, make
sure that:
• Specified spark plug is
used.
• Specified fuel is used.
Worn piston, ring and cylinder bore “Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning in Section
1D”
Worn connecting rod bearing “Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning in Section
1D”
Worn crank pin “Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning in Section
1D”
Loose connecting rod bolts “Pistons, Piston Rings, Connecting Rods and
Cylinders Removal and Installation in Section
1D”
Low oil pressure Condition “Low oil pressure”
Engine noise –
Crankshaft noise
NOTE
Before checking
mechanical noise, make
sure that:
• Specified spark plug is
used.
• Specified fuel is used.
Low oil pressure Condition “Low oil pressure”
Worn main bearing “Main Bearings, Crankshaft and Cylinder Block
Inspection in Section 1D”
Worn crankshaft journal “Main Bearings, Crankshaft and Cylinder Block
Inspection in Section 1D”
Loose bearing cap bolts “Main Bearings, Crankshaft and Cylinder Block
Removal and Installation in Section 1D”
Excessive crankshaft thrust play “Main Bearings, Crankshaft and Cylinder Block
Inspection in Section 1D”
Engine overheating Inoperative thermostat “Thermostat Inspection in Section 1F”
Poor water pump performance “Water Pump Inspection in Section 1F”
Clogged or leaky radiator “Radiator On-Vehicle Inspection and Cleaning
in Section 1F”
Improper engine oil grade “Engine Oil and Filter Change in Section 0B”
Clogged oil filter or oil strainer “Oil Pressure Check in Section 1E”
Poor oil pump performance “Oil Pressure Check in Section 1E”
Faulty radiator cooling fan control
system “Radiator Cooling Fan Low Speed Control
System Check” or “Radiator Cooling Fan High
Speed Control System Check”
Dragging brakes “Brakes Symptom Diagnosis in Section 4A”
Slipping clutch (M/T model) “Clutch System Symptom Diagnosis in Section
5C”
Blown cylinder head gasket “Cylinder Head Inspection in Section 1D”
Air mixed in cooling system
Condition Possible cause Correction / Reference Item