GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century (China) 🢒 Engine 🢒 Engine Mechanical - 2.5L (LB8) and 3.0L (L46) 🢒 Disassembled Views
Figure 1:

Upper Intake Manifold and Components
Object Number: 650010 Size: LF
(1)EGR Valve Gasket
(2)EGR Valve Assembly
(3)EGR Valve Pipe Gasket
(4)EGR Valve Pipe Assembly
(5)EGR Valve Assembly Bolt
(6)Spark Plug Support Bracket
(7)Camshaft Position Sensor Bracket
(8)Upper Intake Manifold Bolt
(9)Map Sensor Bracket
(10)Upper Intake Manifold
(11)Upper Intake Manifold Stud
(12)Thermostat Bypass Hose Clamp
(13)Thermostat Bypass Hose
(14)Thermostat Bypass Hose Clamp
(15)Thermostat Bypass Pipe Screw
(16)Thermostat Bypass Pipe
(17)Thermostat Bypass Pipe Nut
(18)Coolant Outlet Bolt
(19)Thermostat
(20)Coolant Outlet Assembly
(21)Oil Fill Cap
(22)PCV Valve
(23)PCV Valve Grommet
(24)Rocker Arm Cover Bolt
(25)Rocker Arm Cover
(26)Exhaust Crossover Pipe
(27)Exhaust Crossover Nut
(28)Exhaust Crossover Upper Heat Shield
(29)Upper Intake Manifold Gasket
(30)Upper Intake Manifold Gasket
(31)Electronic Ignition System Bolt
(32)Electronic Ignition System Bolt
(33)Electronic Ignition System
(34)Electronic Ignition System Nut
(35)Throttle Body Bolt
(36)Throttle Body Bolt
(37)Throttle Body
(38)Throttle Body Gasket
Figure 2:

Lower Intake Manifold, Cylinder Head, and Components
Object Number: 481240 Size: MF
(1)Fuel Injector Wiring Harness
(2)Fuel Injector Rail Assembly
(3)Lower Intake Manifold Diagnal Bolt
(4)Lower Intake Manifold Vertical Bolt
(5)Engine Coolant Temperature Sensor
(6)Intake Manifold Coolant Pipe
(7)Push Rod
(8)Cylinder Head Bolt
(9)Valve Rocker Arm Bolt
(10)Valve Rocker Arm
(11)Cylinder Head Bolt
(12)Valve Spring Cap Key
(13)Valve Spring Cap
(14)Valve Spring
(15)Valve Stem Oil Seal/Valve Spring Seat
(16)Cylinder Head Bolt
(17)Cylinder Head
(18)Exhaust Crossover Stud
(19)Left Exhaust Manifold
(20)Left Exhaust Manifold Stud
(21)Left Exhaust Manifold Heat Shield Bolt
(22)Left Exhaust Manifold Heat Shield
(23)Left Exhaust Manifold Nut
(24)Left Exhaust Manifold Gasket
(25)Intake Valve
(26)Exhaust Valve
(27)Cylinder Head Gasket
(28)Lower Intake Manifold Gasket
(29)Left Spark Plug Wires
(30)Right Exhaust Manifold Lower Heat Shield
(31)Right Spark Plug Wires
(32)Right Exhaust Manifold Lower Heat Shield Bolt
(33)Right Exhaust Manifold Stud
(34)Right Exhaust Manifold Nut
(35)Right Exhaust Manifold Upper Heat Shield Bolt
(36)Right Exhaust Manifold
(37)Right Exhaust Manifold Upper Heat Shield
(38)Right Exhaust Manifold Gasket
(39)Lower Intake Manifold
(40)Fuel Injector Rail Assembly Bolt
Figure 3:

Engine Block and Components
Object Number: 626613 Size: MF
(1)Upper Piston Compression Ring
(2)Lower Piston Compression Ring
(3)Oil Control Ring Assembly
(4)Piston
(5)Piston Pin
(6)Connecting Rod
(7)Upper Connecting Rod Bearing Insert
(8)Lower Connecting Rod Bearing Insert
(9)Connecting Rod Bearing Cap
(10)Connecting Rod Bolt
(11)Camshaft Rear Cover
(12)Coolant Jacket Press-in Plug
(13)Transmission Dowel Pin
(14)Oil Gallery 1/4 inch Plug
(15)Oil Gallery 3/8 inch Plug
(16)Engine Block
(17)Coolant Jacket Press-in Plug
(18)Coolant Drain Plug
(19)Oil Filter
(20)Oil Filter Fitting
(21)Knock Sensor
(22)Timing Chain Dampener
(23)Timing Chain Dampener Bolt
(24)Engine Front Cover Alignment Pin
(25)Engine Front Cover Bolt
(26)Crankshaft Position Sensor
(27)Crankshaft Front Oil Seal
(28)Crankshaft Position Sensor Bolt
(29)Water Pump Pulley Bolt
(30)Water Pump Pulley
(31)Water Pump Bolt
(32)Water Pump
(33)Water Pump Gasket
(34)Engine Front Cover Bolt
(35)Drive Belt Tensioner Bolt
(36)Drive Belt Tensioner
(37)Engine Front Cover
(38)Engine Front Cover Gasket
(39)Oil Gallery 1/4 inch Plug
(40)Oil Gallery Press-in Plug
(41)Camshaft Sprocket Bolt
(42)Camshaft Sprocket
(43)Camshaft Thrust Plate Screw
(44)Camshaft Thrust Plate
(45)Camshaft Sprocket Alignment Pin
(46)Front Camshaft Bearing
(47)Intermediate Camshaft Bearing
(48)Intermediate Camshaft Bearing
(49)Rear Camshaft Bearing
(50)Camshaft
(51)Crankshaft Position Sensor Side-of-Block Stud
(52)Crankshaft Position Sensor Side-of-Block
(53)Valve Lifter
(54)Camshaft Position Sensor
(55)Camshaft Position Sensor Bolt
(56)Valve Lifter Guide Bolt
(57)Valve Lifter Guide
(58)Oil Pump Drive Assembly
(59)Oil Pump Drive Clamp
(60)Oil Pump Drive Clamp Bolt
Figure 4:

Crankshaft and Components
Object Number: 650012 Size: LF
(1)Crankshaft Balancer Bolt
(2)Crankshaft Balancer Washer
(3)Crankshaft Balancer
(4)Crankshaft Sprocket
(5)Timing Chain
(6)Crankshaft Balancer Key
(7)Crankshaft Upper Main Bearing Insert
(8)Rear Crankshaft Oil Seal
(9)Engine Flywheel
(10)Engine Flywheel Retainer
(11)Engine Flywheel Bolt
(12)Oil Level Indicator Assembly
(13)Oil Pan Gasket
(14)Crankshaft Oil Deflector Nut
(15)Starter Motor
(16)Starter Motor Short Bolt
(17)Starter Motor Long Bolt
(18)Oil Pan Side Bolt
(19)Oil Pan Bolt
(20)Low Oil Level Indicator Bolt - if equipped
(21)Low Oil Level Indicator - if equipped
(22)Oil Pan
(23)Oil Pan Drain Plug Washer
(24)Oil Pan Drain Plug
(25)Oil Pump Bolt
(26)Oil Pump
(27)Oil Pump Drive Shaft
(28)Oil Pan Side Bolt
(29)Crankshaft Main Bearing Cap Stud
(30)Crankshaft Oil Deflector
(31)Crankshaft Main Bearing Cap
(32)Oil Pump Alignment Pin
(33)Crankshaft Rear Main Bearing Cap
(34)Crankshaft Main Bearing Bolt
(35)Crankshaft Lower Main Bearing Insert
(36)Crankshaft