Engine General Information and Diagnosis: 1A-50
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: For J20
Engine in Section 1D” or “Cylinders, Pistons
and Piston Rings Inspection: For M16A Engine
with VVT in Section 1D”
Worn rod bearing
“Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning: For J20
Engine in Section 1D” or “Crank Pin and
Connecting Rod Bearings Inspection: For
M16A Engine with VVT in Section 1D”
Worn crank pin
“Pistons, Piston Rings, Connecting Rods and
Cylinders Inspection and Cleaning: For J20
Engine in Section 1D” or “Crank Pin and
Connecting Rod Bearings Inspection: For
M16A Engine with VVT in Section 1D”
Loose connecting rod nuts
“Pistons, Piston Rings, Connecting Rods and
Cylinders Removal and Installation: For J20
Engine in Section 1D” or “Pistons, Piston
Rings, Connecting Rods and Cylinders
Removal and Installation: For M16A Engine
with VVT 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 bearing
“Main Bearings, Crankshaft and Cylinder Block
Inspection: For J20 Engine in Section 1D” or
“Main Bearings Inspection: For M16A Engine
with VVT in Section 1D”
Worn crankshaft journal
“Main Bearings, Crankshaft and Cylinder Block
Inspection: For J20 Engine in Section 1D” or
“Crankshaft Inspection: For M16A Engine with
VVT in Section 1D”
Loose bearing cap bolts
“Main Bearings, Crankshaft and Cylinder Block
Removal and Installation: For J20 Engine in
Section 1D” or “Main Bearings, Crankshaft and
Cylinder Block Removal and Installation: For
M16A Engine with VVT in Section 1D”
Excessive crankshaft thrust play
“Main Bearings, Crankshaft and Cylinder Block
Inspection: For J20 Engine in Section 1D” or
“Crankshaft Inspection: For M16A Engine with
VVT in Section 1D”
Condition
Possible cause
Correction / Reference Item
www.CarGarage.ir
www.CarGarage.ir
www.CarGarage.ir
