Suzuki Grand Vitara 2011 Manual page 122

1A-53 Engine General Information and Diagnosis: For Petrol Engine Model
Condition
Hard starting (Engine
cranks OK)
Low oil pressure
Engine noise – Valve
noise
NOTE
Before checking
mechanical noise, make
sure that:
• Specified spark plug is
used.
• Specified fuel is used.
Possible cause
Sticky valve stem
Weak or damaged valve springs
Compression leak at cylinder head
gasket
Sticking or damaged piston ring
Worn piston, ring or cylinder
Malfunctioning PCV valve
Camshaft position control (VVT) system
out of order (for M16 engine)
Faulty EGR system
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
Correction / Reference Item
"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"
"Cylinder Head Inspection: For J20 Engine in
Section 1D" or "Cylinder Head 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"
"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"
"PCV Valve Inspection: For Petrol Engine
Model in Section 1B"
"Oil Control Valve Inspection: For M16A
Engine with VVT in Section 1D"
"EGR System Inspection: For Petrol Engine
Model in Section 1B"
"Engine Oil and Filter Change (Petrol Engine
Model) 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".