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3. Troubleshooting
58
(3) Engine speed and compression pressure (for reference)
(4) Measured value and troubleshooting
When the measured compression pressure is below the limit value, inspect each part by referring to the
table below.
No. Item
Cause
Corrective
action
1
Air cleaner element
Clogged element
Broken element
Defect at element seal
portion
Clean the element.
Replace the element.
2
Valve clearance
Excessive or no
clearance
Adjust the valve clearance.
(See 3.5 in Chapter 3.)
3
valve timing
Incorrect valve clearance
Adjust the valve clearance.
(See 3.5 in Chapter 3.)
4
Cylinder head gasket
Gas leak from gasket
Replace the gasket.
Retighten the cylinder head bolts to the
specified torque.
(See 4.2(2)12) in Chapter 4.)
5
Intake/exhaust vale
Valve seat
Gas leak due to worn
valve seat or foreign
matter trapping
Sticking valve
Lap the valve seat.
(See 4.2(6) in Chapter 4.)
Replace the intake/exhaust valve.
6
Piston
Piston ring
Cylinder
Gas leak due to
scratching or wear
Perform honing and use an oversized part.
(See 4.4(5)-(5-1), (5-4) and (6) in Chapter 4.)
Summary of Contents for 3TNV Series
Page 1: ...4TNV106 4TNV106T 4TNV94L 4TNV98 4TNV98T 3TNV82A 3TNV84 T 4TNV84 T 3TNV88 4TNV88 ...
Page 31: ...1 General 1 4 Engine External Views 16 ...
Page 32: ...1 General 1 5 Structural Description 17 ...
Page 156: ...9 Starting Motor 9 1 2 Components 141 ...
Page 157: ...9 Starting Motor 9 1 3 Troubleshooting 142 ...
Page 172: ...9 Starting Motor 9 2 3 Troubleshooting 157 ...
Page 175: ...9 Starting Motor 2 Removal of magnetic switch Remove the M6 bolts 10mm 2 160 ...
Page 185: ...9 Starting Motor 3 Brush 1 Check wear of the brush and the brush spring force 170 ...
Page 194: ...10 Alternator 179 10 1 6 Troubleshooting ...
Page 195: ...11 Electric Wiring 180 11 ELECTRIC WIRING 11 1 Electric Wiring Diagram ...
Page 213: ......