EM-31
ENGINE MECHANICAL - Compression Check
(c) Fully open the throttle valve.
(d) While cranking the engine, measure the compression
pressure.
HINT: Always use a fully charged battery to obtain engine
revolution of 250 rpm or more.
(e) Repeat steps (a) through (d) for each cylinder.
NOTICE: This measurement must be done in as short
a time as possible.
Compression pressure:
IPZ and 1HZ
37.0 kg/cm
2
(526 psi, 3,628 kPa) or more
1HD-T
35.0 kg/cm
2
(498 psi, 3,432 kPa) or more
Minimum pressure:
IPZ and 1HZ
27.0 kg/cm
2
(384 psi, 2,648 kPa) or more
1HD-T
25.0 kg/cm
2
(356 psi, 2,452 kpa) or more
Difference between each cylinder:
5.0 kg/cm
2
(71 psi, 490 kPa) or less
(f) If the cylinder compression in one or more cylinders is
low, pour a small amount of engine oil into the
cylinder through the glow plug hole and repeat steps
(a) through (d) for the cylinder with low compression.
• If adding oil helps the compression chances are that
the piston rings and/or cylinder bore are worn or
damaged.
• If pressure stays low, a valve may be sticking or
seating improperly, or there may be leakage past the
gasket.
5. REINSTALL GLOW PLUGS
(See step 11 on page EM-81)
6. RECONNECT INJECTION PUMP (FUEL CUT
SOLENOID) CONNECTOR
Summary of Contents for 1HD-T
Page 1: ......
Page 53: ...EM 42 ENGINE MECHANICAL Timing Gears TIMING GEARS COMPONENTS ...
Page 65: ...EM 54 ENGINE MECHANICAL Cylinder Head CYLINDER HEAD COMPONENTS ...
Page 95: ...EM 84 ENGINE MECHANICAL Cylinder Block CYLINDER BLOCK COMPONENTS ...
Page 133: ...TURBOCHARGER SYSTEM Turbocharger TC 9 COMPONENTS ...
Page 145: ...FU 6 FUEL SYSTEM Fuel Heater System FUEL HEATER SYSTEM SYSTEM CIRCUIT ...
Page 166: ...FUEL SYSTEM Injection Pump FU 27 INJECTION PUMP REMOVAL OF INJECTION PUMP ...
Page 169: ...FU 30 FUEL SYSTEM Injection Pump COMPONENTS ...
Page 170: ...FUEL SYSTEM Injection Pump FU 31 COMPONENTS Cont d ...
Page 171: ...FU 32 FUEL SYSTEM Injection Pump COMPONENTS Cont d ...
Page 251: ...LU 4 LUBRICATION SYSTEM Troubleshooting TROUBLESHOOTING ...
Page 255: ...LU 8 LUBRICATION SYSTEM Oil Pump OIL PUMP COMPONENT ...
Page 272: ...ST 4 STARTING SYSTEM Pre Heating System Super Glow Type TIMER CHARACTERISTIC DIAGRAM Cont d ...
Page 282: ...ST 14 STARTING SYSTEM Starting System Circuit STARTING SYSTEM CIRCUIT Cont d ...
Page 340: ...B 1 STANDARD BOLT TORQUE SPECIFICATIONS Page STANDARD BOLT TORQUE SPECIFICATIONS B 2 ...
Page 343: ...C 1 SSTAND SSM Page SST SPECIAL SERVICE TOOLS C 2 SSM SPECIAL SERVICE MATERIALS C 6 ...