Engine Mechanical (J20 Engine) - Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual

ENGINE MECHANICAL (J20 ENGINE)

WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System :
• Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to "Air Bag System Components and Wiring Location View" under
"General Description" in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and "Ser-
vice Precautions" under "On-Vehicle Service" in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
• Technical service work must be started at least 90 seconds after the ignition switch is turned to the
"LOCK" position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
General Description......................................6A4-2
Engine .........................................................6A4-2
Engine Lubrication ......................................6A4-3
On-Vehicle Service........................................6A4-4
Compression Check....................................6A4-4
Engine Vacuum Check................................6A4-6
Oil Pressure Check .....................................6A4-7
Air Cleaner Element ....................................6A4-8
Throttle Body and Intake Manifold ..............6A4-9
Exhaust Manifold.......................................6A4-12
Cylinder Head Cover .................................6A4-15
Oil Pan and Oil Pump Strainer ..................6A4-16
Oil Pump ...................................................6A4-20
Timing Chain Cover ..................................6A4-24
2nd Timing Chain and Chain
Tensioner ..................................................6A4-29
SECTION 6A4
CONTENTS
1st Timing Chain and Chain
Tensioner .................................................. 6A4-35
Camshafts and Valve Lash Adjusters ....... 6A4-41
Valves and Cylinder Head ........................ 6A4-50
Pistons, Piston Rings, Connecting
Rods and Cylinders................................... 6A4-63
Engine Mountings ..................................... 6A4-77
Unit Repair Overhaul ..................................6A4-78
Engine Assembly ...................................... 6A4-78
Main Bearings, Crankshaft and
Cylinder Block ........................................... 6A4-83
Special Tool.................................................6A4-98
Required Service Material ........................6A4-100
Tightening Torque Specifications...........6A4-101
ENGINE MECHANICAL (J20 ENGINE) 6A4-1
6A4