Suzuki GRAND VITARA Owner's Manual page 104

1A-49 Engine General Information and Diagnosis:
Condition
Low oil pressure
Engine noise – Valve
noise
NOTE
Before checking
mechanical noise, make
sure that:
• Specified spark plug is
used.
• Specified fuel is used.
Engine noise – Piston,
ring and cylinder noise
NOTE
Before checking
mechanical noise, make
sure that:
• Specified spark plug is
used.
• Specified fuel is used.
Possible cause
Improper oil viscosity
Malfunctioning oil pressure switch
Clogged oil strainer
Functional deterioration of oil pump
Worn oil pump relief valve
Excessive clearance in various sliding
parts
Improper valve lash
Worn valve stem and guide
Weak or broken valve spring
Warped or bent valve
Worn piston, ring and cylinder bore
Correction / Reference Item
"Engine Oil and Filter Change: in Section 0B"
"Oil Pressure Switch Inspection: in Section
9C"
"Oil Pan and Oil Pump Strainer Cleaning: For
J20 Engine in Section 1E" or "Oil Pan and Oil
Pump Strainer Cleaning: For M16A Engine
with VVT in Section 1E"
"Oil Pump Inspection: For J20 Engine in
Section 1E" or "Oil Pump Inspection: For M16A
Engine with VVT in Section 1E"
"Oil Pump Inspection: For J20 Engine in
Section 1E" or "Oil Pump Inspection: For M16A
Engine with VVT in Section 1E"
"Camshaft, Tappet and Shim Inspection: For
J20 Engine in Section 1D" or "Camshaft,
Tappet and Shim Inspection: For M16A Engine
with VVT in Section 1D"
"Valves and Valve Guides Inspection: For J20
Engine in Section 1D" or "Valves and Valve
Guides Inspection: For M16A Engine with VVT
in Section 1D".
"Valve Spring Inspection: For J20 Engine in
Section 1D" or "Valve Spring Inspection: For
M16A Engine with VVT in Section 1D"
"Valves and Valve Guides Inspection: For J20
Engine in Section 1D" or "Valves and Valve
Guides Inspection: For M16A Engine with VVT
in Section 1D".
"Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning: For J20
Engine in Section 1D" or "Cylinders, Pistons
and Piston Rings Inspection: For M16A Engine
with VVT in Section 1D"