Suzuki 2000 Grand Vitara SQ625 Service Manual page 148

Condition
Low oil pressure
Engine noise
Note: Before checking
the mechanical noise,
make sure that:
D Ignition timing is
properly adjusted.
D Specified spark plug
is used.
D Specified fuel is used.
Possible Cause
D Improper oil viscosity
D Malfunctioning oil pressure switch
D Clogged oil strainer
D Functional deterioration of oil pump
D Worn oil pump relief valve
D Excessive clearance in various sliding
parts
Valve noise
D Faulty hydraulic valve lash adjuster
D Worn valve stem and guide
D Weak or broken valve spring
D Warped or bent valve
D Loose camshaft housing bolts
Piston, ring and cylinder noise
D Worn piston, ring and cylinder bore
Connecting rod noise
D Worn crankpin bearing
D Worn crankpin
D Loose connecting rod nuts
D Low oil pressure
Crankshaft noise
D Low oil pressure
D Worn crankshaft journal bearing
D Worn crankshaft journal
D Loose lower crankcase
(bearing cap) bolts
D Excessive crankshaft thrust play
ENGINE (H25 ENGINE) 6-1-37
Reference Item
Engine oil and oil filter change
in Maintenance and Lubrication
section.
Oil pressure switch inspection in
BODY ELECTRICAL SYSTEM
section.
Oil pan and oil pump strainer
cleaning in Engine Mechanical
section.
Oil pump in Engine Mechanical
section.
Oil pump in Engine Mechanical
section.
Hydraulic valve lash adjuster in
Engine Mechanical section.
Valves inspection in Engine
Mechanical section.
Valve springs inspection in Engine
Mechanical section.
Valves inspection in Engine
Mechanical section.
Camshafts in Engine Mechanical
section.
Pistons and cylinders inspection in
Engine Mechanical section.
Crankpin and connecting rod
bearing inspection in Engine
Mechanical section.
Crankpin and connecting rod
bearing inspection in Engine
Mechanical section.
Connecting rod installation in Engine
Mechanical section.
Previously outlined.
Previously outlined.
Crankshaft and bearing inspection in
Engine Mechanical section.
Crankshaft and bearing inspection in
Engine Mechanical section.
Crankshaft installation in Engine
Mechanical section.
Crankshaft inspection in Engine
Mechanical section.