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M161 ENGINE MECHANICAL
CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless
other-wise noted.
Maintenance and Repair ................................... 1B2-2
On-Vehicle Service ............................................. 1B2-2
Engine Assembly .............................................. 1B2-2
Crankcase Ventilation System ............................ 1B2-9
Generator ........................................................ 1B2-13
Engine Mount .................................................. 1B2-14
Poly V-Belt ...................................................... 1B2-16
Tensioning Device ........................................... 1B2-18
Tensioning Device Shock Absorber .................. 1B2-19
Poly V-Belt Inspection ...................................... 1B2-20
Cylinder Head Cover ........................................ 1B2-22
Cylinder Head Front Cover ............................... 1B2-24
Cylinder Head ................................................. 1B2-26
Timing Gear Case Cover .................................. 1B2-30
Crankshaft Sealing Rear Cover ........................ 1B2-33
Belt Pulley and Vibration Damper ..................... 1B2-35
Crankshaft Front Radial Seal ............................ 1B2-38
Crankshaft Rear Radial Seal ............................. 1B2-40
Crankshaft ....................................................... 1B2-41
Flywheel / Driven Plate ..................................... 1B2-47
Camshaft Adjuster ........................................... 1B2-50
Camshaft Sprocket Bolt ................................... 1B2-53
Camshaft ........................................................ 1B2-54
Camshaft Timing Position ................................ 1B2-57
Valve Spring .................................................... 1B2-59
SECTION 1B2
TABLE OF CONTENTS
Valve Stem Seal .............................................. 1B2-63
Chain Tensioner ............................................... 1B2-64
Timing Chain ................................................... 1B2-68
Tensioning Rail ................................................ 1B2-73
Cylinder Head Guide Rail ................................. 1B2-74
Crankcase Guide Rail ...................................... 1B2-76
Crankshaft Sprocket ........................................ 1B2-77
Piston .............................................................. 1B2-79
Connecting Rod ............................................... 1B2-82
Piston Ring ...................................................... 1B2-84
Oil Pan ............................................................ 1B2-86
Engine Oil and Oil Filter Element ...................... 1B2-88
Oil Pump ......................................................... 1B2-91
Oil Pressure Relief Valve .................................. 1B2-93
Oil Non-Return Valve ........................................ 1B2-94
Oil Dipstick Guide Tube ................................... 1B2-95
Unit Repair ........................................................ 1B2-96
Core Plugs in Crankcase .................................. 1B2-96
Cylinder Bore .................................................. 1B2-98
Crankcase Mating Surface ............................. 1B2-100
Cylinder Head Mating Surface ........................ 1B2-102
Specifications ................................................. 1B2-104
Fastener Tightening Specifications ................. 1B2-104
Special Tools and Equipment ........................ 1B2-106
Special Tools Table ........................................ 1B2-106
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