Suzuki Jimny Service Manual page 383

6-26 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Condition
Excessive engine oil
consumption
Low oil pressure
Engine noise
See NOTE below.
NOTE:
Before checking the mechanical noise, make sure that :
• Ignition timing is properly adjusted.
• Specified spark plug is used.
• Specified fuel is used.
Possible Cause
• Sticky piston ring
• Worn piston and cylinder
• Worn piston ring groove and ring
• Improper location of piston ring gap
• Worn or damaged valve stem seal
• Worn valve stem
• 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
• Loose camshaft housing bolts
• Worn piston, ring and cylinder bore
• Worn crankpin bearing
• Worn crankpin
• Loose connecting rod nuts
• Low oil pressure
• Worn crankshaft journal bearing
• Worn crankshaft journal
• Loose lower crankcase (bearing cap) bolts Main bearings, Crankshaft and cylin-
• Excessive crankshaft thrust play
Reference Item
Pistons, piston rings, connecting rods
and cylinders in Section 6A1.
Pistons, piston rings, connecting rods
and cylinders in Section 6A1.
Pistons, piston rings, connecting rods
and cylinders in Section 6A1.
Pistons, piston rings, connecting rods
and cylinders in Section 6A1.
Valves and cylinder head in Section
6A1.
Valves and cylinder head in Section
6A1.
ITEM1-3 Engine oil and oil filter
change in Section 0B.
Oil pressure switch in Section 8.
Oil pan and oil pump strainer in Sec-
tion 6A1.
Oil pump in Section 6A1.
Oil pump in Section 6A1.
Refer to Section 6A1.
Valve lash in Section 6A1.
Valves and cylinder head in Section
6A1.
Valve springs in Section 6A1.
Valves and cylinder head in Section
6A1.
Camshaft in Section 6A1.
Pistons and cylinders in Section 6A1.
Crankpin and connecting rod bearing
in Section 6A1.
Crankpin and connecting rod bearing
in Section 6A1.
Connecting rod in Section 6A1.
Previously outlined.
Main bearings, Crankshaft and cylin-
der block in Section 6A1.
Main bearings, Crankshaft and cylin-
der block in Section 6A1.
der block in Section 6A1.
Main bearings, Crankshaft and cylin-
der block in Section 6A1.