GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Allure 🢒 Engine 🢒 Engine Mechanical - 3.8L 🢒 Disassembled Views
Figure 1:

Engine Block and Components
Object Number: 1210578 Size: MF
(100)Engine Block
(101)Cylinder Head Locator Pins
(102)Starter Motor Heat Shield Bolt - Large
(103)Starter Motor Heat Shield Bolt - Small
(104)Starter Motor Heat Shield
(105)Knock Sensor
(106)Engine Block Expansion Plug
(107)Engine Front Cover Locator Pins
(107)Engine Front Cover Locator Pins
(108)Engined Block Coolant Drain Plug
(109)Timing Chain Dampener
(110)Engine Block Oil Gallery Plug - Front
(111)Engine Mount Strut Access Hole Plug
(112)Engine Mount Strut Bracket Stud
(113)Engine Block Oil Gallery Plug - Right
(128)Connecting Rod Bearing Cap Bolt
(129)Connecting Rod Bearing Cap
(130)Connecting Rod Bearing
(131)Connecting Rod
(132)Piston Pin Retainer
(133)Piston Pin
(134)Piston
(135)Piston Oil Control Ring
(136)Piston Compression Ring
(137)Piston Compression Ring
(138)Drive Belt Idler Pulley Bracket Bolt - Lower - Supercharger
(139)Drive Belt Idler Pulley - Lower - Supercharger
(140)Drive Belt Idler Pulley Bolt - Lower - Supercharger
(141)Drive Bolt Idler Pulley Bracket - Lower - Supercharger
(230)Camshaft Bearing - 1 & 4
(230)Camshaft Bearing - 1 & 4
(231)Camshaft Bearing - 2 & 3
(232)Camshaft
(233)Camshaft Key
(234)Camshaft Thrust Plate
(235)Camshaft Thrust Plate Bolt
(236)Balance Shaft Drive Gear
(237)Camshaft Sprocket
(238)Camshaft Position Sensor Magnet
(239)Timing Chain
(240)Camshaft Sprocket Bolt
(241)Crankshaft Sprocket
(242)Balance Shaft Rear Bushing
(243)Balance Shaft
(244)Balance Shaft Gear Pin
(245)Balance Shaft Retainer
(246)Balance Shaft Retainer Bolt
(247)Balance Shaft Driven Gear
(248)Balance Shaft Gear Bolt
(405)Oil Pump Screen Bolt
(406)Oil Pump Screen
(407)Oil Pump Screen Gasket
(416)Oil Level Indicator Tube
(417)Oil Level Indicator
(418)Oil Level Indicator Tube Nut
(419)Oil Level Indicator Tube Seal
(547)Transmission Locator Pin
(548)Crankshaft Rear Oil Seal Housing Gasket
(549)Crankshaft Rear Oil Seal Housing
(550)Crankshaft Rear Oil Seal Housing Bolt
Figure 2:

Crankshaft and Components
Object Number: 1792489 Size: LF
(114)Crankshaft Main Bearing - Upper - 1, 3 & 4
(115)Crankshaft Main Bearing - Upper - 2
(116)Crankshaft Balancer Key
(117)Crankshaft
(118)Crankshaft Main Bearing - Lower - 1
(119)Crankshaft Main Bearing - Lower - 2
(120)Crankshaft Main Bearing - Lower - 3
(121)Crankshaft Main Bearing - Lower - 4
(122)Crankshaft Main Bearing Cap 1
(123)Crankshaft Main Bearing Cap 2
(124)Crankshaft Main Bearing Cap 3
(125)Crankshaft Main Bearing Cap 4
(126)Crankshaft Main Bearing Cap Bolt - Side
(127)Crankshaft Main Bearing Cap Bolt
(300)Water Pump
(301)Water Pump Gasket
(302)Water Pump Bolt - Short
(303)Water Pump Bolt - Long
(304)Water Pump Pulley
(305)Water Pump Pulley Bolt
(400)Oil Pan
(401)Oil Pan Gasket
(402)Oil Pan Bolt
(403)Oil Pan Drain Plug
(404)Oil Pan Drain Plug Seal
(408)Oil Filter
(409)Oil Filter Fitting
(410)Oil Filter Bypass Valve
(411)Oil Filter Adapter
(412)Oil Filter Adapter Bolt
(413)Oil Filter Adapter Gasket
(414)Oil Pressure Relief Valve
(415)Oil Pressure Relief Valve Spring
(535)Oil Pump Cover Bolt
(536)Oil Pump Cover
(537)Oil Pump Gear Set
(538)Engine Front Cover Gasket
(539)Engine Front Cover
(540)Engine Front Cover Stud
(541)Engine Front Cover Bolt
(542)Crankshaft Front Oil Seal
(543)Crankshaft Position Sensor Shield
(544)Crankshaft Balancer Key
(546)Crankshaft Balancer Bolt
(551)Crankshaft Rear Oil Seal
(552)Flywheel
(553)Flywheel Bolt
(714)Oil Level Indicator Switch
(715)Oil Level Indicator Switch Seal
(716)Camshaft Position Sensor Bolt
(717)Camshaft Position Sensor
(718)Camshaft Position Sensor Seal
(719)Engine Oil Pressure Indicator Sensor
(720)Crankshaft Position Sensor
(721)Crankshaft Position Sensor Stud
Figure 3:

Intake Manifold and Components
Object Number: 1210585 Size: LF
(306)Water Outlet Housing Bolt
(307)Coolant Bleed Valve Fitting
(308)Coolant Bleed Valve
(309)Water Outlet Housing Stud
(310)Water Outlet Housing
(311)Thermostat Seal
(312)Thermostat
(500)Intake Manifold - Upper
(504)PCV Valve
(505)PCV Valve Spring
(507)PCV Valve Retainer
(512)Throttle Body Stud
(513)Throttle Body Gasket
(514)Throttle Body
(515)Throttle Body Bolt
(516)Throttle Body Nut
(523)Fuel Rail
(524)Fuel Rail Nut
(526)Intake Manifold Bolt
(527)Intake Manifold - Lower
(529)Engine Coolant Manifold Gasket
(530)Engine Coolant Manifold
(531)Engine Coolant Manifold Bolt
(532)Intake Manifold Gasket - Lower
(533)Intake Manifold Seal - Lower
(534)Fuel Injector Seal
(534)Fuel Injector Seal
(561)Fuel Injector Retaining Clip
(562)Fuel Injector
(563)PCV Valve Seal - Small
(564)PCV Valve Seal - Large
(565)Intake Manifold Bolt - Upper - Short
(566)Intake Manifold Stud - Upper - Short
(567)Intake Manifold Stud - Upper - Long
(568)Intake Manifold Bolt - Upper - Long
(569)Generator Brace Bracket Bolt - Short
(570)Generator Brace Bracket Bolt - Long
(571)Generator Brace Bracket
(572)Intake Manifold Stud - Lower
(573)Intake Manifold Gasket - Upper
(574)Vacuum Manifold Seal
(575)Vacuum Manifold
(576)EVAP Purge Valve Bracket Bolt
(577)EVAP Purge Valve Bracket
(578)Engine Mounting Strut Bracket Bolt - Upper - Long
(579)Engine Mounting Strut Bracket Bolt - Upper - Short
(580)Engine Mounting Strut Bracket - Upper
(581)Engine Mounting Strut Bracket - Lower
(582)Engine Mounting Strut Bracket Bolt - Lower
(583)Engine Mounting Strut Bracket Nut - Lower
(727)Engine Coolant Temperature Sensor
(728)EVAP Purge Valve Seal
(729)EVAP Purge Valve
(730)EVAP Purge Valve Bolt
(732)MAP Sensor
(733)MAP Sensor Seal
Figure 4:

Supercharger and Components - L32
Object Number: 1210588 Size: LF
(306)Water Outlet Housing Bolt
(307)Coolant Bleed Valve Fitting
(308)Coolant Bleed Valve
(309)Water Outlet Housing Stud
(310)Water Outlet Housing
(311)Thermostat Seal
(312)Thermostat
(500)Intake Manifold - Upper
(501)Supercharger Oil Fill Plug
(502)Supercharger Bolt - Long
(503)Supercharger Bolt - Short
(504)PCV Valve
(505)PCV Valve Spring
(506)PCV Valve Retainer Gasket
(507)PCV Valve Retainer
(508)PCV Valve Retainer Bolt
(509)Vacuum Source Manifold Bolt
(510)Vacuum Source Manifold
(511)Supercharger Stud
(512)Throttle Body Stud
(513)Throttle Body Gasket
(514)Throttle Body
(515)Throttle Body Bolt
(516)Throttle Body Nut
(517)Wastegate Valve
(518)Wastegate Valve Bolt
(519)Supercharger Bypass Valve
(520)Supercharger Bypass Valve Hose - to Wastegate Valve
(521)Supercharger Bypass Valve Nut
(522)Intake Manifold Gasket - Upper
(523)Fuel Rail
(524)Fuel Rail Nut
(525)Supercharger Bypass Valve Harness
(526)Intake Manifold Bolt
(527)Intake Manifold - Lower
(528)Vacuum Source Manifold Tube
(529)Engine Coolant Manifold Gasket
(530)Engine Coolant Manifold
(531)Engine Coolant Manifold Bolt
(532)Intake Manifold Gasket - Lower
(533)Intake Manifold Seal - Lower
(534)Fuel Injector Seal
(534)Fuel Injector Seal
(561)Fuel Injector Retaining Clip
(562)Fuel Injector
(564)PCV Valve Seal - Large
(723)BARO Sensor
(724)MAP Sensor
(725)MAP/BARO Sensor Bracket
(726)MAP/BARO Sensor Bracket Bolt
(727)Engine Coolant Temperature Sensor
(728)EVAP Purge Valve Seal
(729)EVAP Purge Valve
(730)EVAP Purge Valve Bolt
(747)MAP/BARO Sensor Retainer Clip
(747)MAP/BARO Sensor Retainer Clip
Figure 5:

Cylinder Head and Components - Left - L26
Object Number: 1210590 Size: LF
(200)Cylinder Head
(201)Cylinder Head Bolt - Long
(202)Cylinder Head Bolt - Short
(203)Valve Seal
(204)Valve Spring
(205)Valve Stem Cap
(206)Valve Stem Key
(207)Spark Plug
(208)Exhaust Valve
(209)Intake Valve
(210)Cylinder Head Gasket - LH
(211)Valve Rocker Arm Retainer
(212)Valve Rocker Arm
(213)Valve Rocker Arm Bolt
(214)Valve Rocker Arm Cover Gasket
(215)Valve Rocker Arm Cover - LH
(216)Valve Rocker Arm Cover Bolt
(217)Oil Fill Tube Seal
(218)Oil Fill Tube
(219)Oil Fill Cap Seal
(220)Oil Fill Cap
(229)Cylinder Head Expansion Plug
(249)Valve Lifter Guide Bolt
(250)Valve Lifter Guide
(251)Valve Lifter
(252)Pushrod
(253)Engine Mounting Strut Bracket Bolt - Long - Left
(254)Engine Mounting Strut Bracket
(255)Engine Mounting Strut Bracket Bolt - Short - Left
(601)Exhuast Manifold Stud
(602)Engine Lift Bracket
(603)Engine Lift Bracket Nut
(604)Engine Lift Bracket Bolt
(610)Exhaust Manifold Nut
(612)Exhaust Manifold Gasket - Left
(613)Exhuast Manifold Stud - to Cylinder Head
(626)Exhaust Manifold - Left
(627)Exhaust Manifold Bolt - Left
(628)Exhaust Manifold Head Shield - Left
(629)Exhaust Manifold Heat Shield Nut - Left
(630)Power Brake Booster Heat Shield Nut
(631)Power Brake Booster Heat Shield
(632)Exhaust Crossover Pipe Bolt
(633)Exhaust Crossover Pipe
(634)Exhaust Crossover Pipe Stud
(635)Exhaust Crossover Pipe Seal
(700)Electronic Ignition Module
(701)Spark Plug Wire Harness Clip
(702)Spark Plug Wire Harness
(703)Spark Plug Wire Heat Shield
(743)Electronic Ignition Module Nut
(744)Electronic Ignition Module Stud
Figure 6:

Cylinder Head and Components - Left - L32
Object Number: 1210593 Size: LF
(200)Cylinder Head
(201)Cylinder Head Bolt - Long
(202)Cylinder Head Bolt - Short
(203)Valve Seal
(204)Valve Spring
(205)Valve Stem Cap
(206)Valve Stem Key
(207)Spark Plug
(208)Exhaust Valve
(209)Intake Valve
(210)Cylinder Head Gasket - LH
(211)Valve Rocker Arm Retainer
(212)Valve Rocker Arm
(213)Valve Rocker Arm Bolt
(214)Valve Rocker Arm Cover Gasket
(215)Valve Rocker Arm Cover - LH
(216)Valve Rocker Arm Cover Bolt
(217)Oil Fill Tube Seal
(218)Oil Fill Tube
(219)Oil Fill Cap Seal
(220)Oil Fill Cap
(229)Cylinder Head Expansion Plug
(249)Valve Lifter Guide Bolt
(250)Valve Lifter Guide
(251)Valve Lifter
(252)Pushrod
(253)Engine Mounting Strut Bracket Bolt - Long - Left
(254)Engine Mounting Strut Bracket
(255)Engine Mounting Strut Bracket Bolt - Short - Left
(258)Valve Rocker Arm Cover O-ring
(601)Exhuast Manifold Stud
(602)Engine Lift Bracket
(603)Engine Lift Bracket Nut
(604)Engine Lift Bracket Bolt
(610)Exhaust Manifold Nut
(612)Exhaust Manifold Gasket - Left
(613)Exhuast Manifold Stud - to Cylinder Head
(626)Exhaust Manifold - Left
(627)Exhaust Manifold Bolt - Left
(628)Exhaust Manifold Head Shield - Left
(629)Exhaust Manifold Heat Shield Nut - Left
(630)Power Brake Booster Heat Shield Nut
(631)Power Brake Booster Heat Shield
(632)Exhaust Crossover Pipe Bolt
(633)Exhaust Crossover Pipe
(634)Exhaust Crossover Pipe Stud
(635)Exhaust Crossover Pipe Seal
(700)Electronic Ignition Module
(701)Spark Plug Wire Harness Clip
(702)Spark Plug Wire Harness
(703)Spark Plug Wire Heat Shield
(704)Engine Wiring Harness Clip Bracket
(705)Engine Wiring Harness Clip Bracket Bolt
(706)Engine Mounting Strut Bracket Stud
(707)Engine Mounting Strut Bracket
(708)Engine Mounting Strut Bracket Nut
(709)Generator Brace Stud
(710)Drive Belt Idler Pulley
(711)Drive Belt Idler Pulley Bolt - Upper - Supercharger
(712)Drive Belt Tensioner - Supercharger
(713)Drive Belt Tensioner Nut - Supercharger
(731)Drive Belt Tensioner Stud - Supercharger
Figure 7:

Cylinder Head and Components - Right - L26/L32
Object Number: 1792493 Size: LF
(200)Cylinder Head
(210)Cylinder Head Gasket - RH
(214)Valve Rocker Arm Cover Gasket
(222)Thermostat Bypass Pipe Seal - Upper
(222)Thermostat Bypass Pipe Seal - Upper
(223)Thermostat Bypass Pipe - Upper
(224)Thermostat Bypass Pipe Seal - Lower
(224)Thermostat Bypass Pipe Seal - Lower
(225)Thermostat Bypass Pipe - Lower
(226)Drive Belt Tensioner Bolt
(227)Drive Belt Tensioner
(228)Valve Rocker Arm Cover - RH
(600)Exhaust Manifold - Right
(601)Exhaust Manifold Stud
(602)Engine Lift Bracket
(603)Engine Lift Bracket Nut
(604)Engine Lift Bracket Bolt
(605)Engine Sight Shield Bracket Nut
(606)Engine Sight Shield Bracket
(607)Heated Oxygen Sensor
(608)Exhaust Manifold Heat Shield Bolt - Right
(609)Exhaust Manifold Heat Shield - Right
(610)Exhaust Manifold Nut
(611)EGR Valve Adapter Pipe Bolt - to Exhaust Manifold
(612)Exhaust Manifold Gasket - Right
(613)Exhaust Manifold Stud - to Cylinder Head
(617)EGR Valve Nut
(618)EGR Valve
(619)EGR Valve Gasket
(620)EGR Valve Adapter
(621)EGR Valve Outlet Pipe
(622)EGR Valve Outlet Pipe Nut
(623)EGR Valve Outlet Pipe Bolt
(624)EGR Valve Adapter Bolt
(636)Secondary Air Injection Valve
(637)Secondary Air Injection Valve Bolt
(638)Secondary Air Injection Hose Clamp
(638)Secondary Air Injection Hose Clamp
(639)Secondary Air Injection Hose Clamp
(639)Secondary Air Injection Hose Clamp
(640)Secondary Air Injection Pipe - Pump to Valve
(641)Secondary Air Injection Pipe Nut
(642)Secondary Air Injection Hose - to Pump
(643)Secondary Air Injection Hose - to Valve
(644)Secondary Air Injection Pipe - Valve to Manifold
(645)Secondary Air Injection Pipe Gasket - to Manifold
(646)Secondary Air Injection Pipe Bolt -  to Valve
(647)Secondary Air Injection Pipe Gasket - to Valve
(648)Secondary Air Injection Valve Mounting Bracket
(649)Secondary Air Injection Valve Mounting Bracket Bolt