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

Engine Block and Components
Object Number: 1226860 Size: LF
(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
(108)Engine 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 Belt Idler Pulley Bracket - Lower - Supercharger
(142)Engine Front Cover Locator Pins - Small
(230)Camshaft Bearing - 1 and 4
(230)Camshaft Bearing - 1 and 4
(231)Camshaft Bearing - 2 and 3
(232)Camshaft
(233)Camshaft Key
(234)Camshaft Thrust Plate
(235)Camshaft Thrust Plate Bolt
(236)Balance Shaft Drive Gear
(237)Camshaft Sprocket
(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
(422)Oil Level Indicator 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: 1792448 Size: LF
(114)Crankshaft Main Bearing - Upper - 1, 3 and 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
(420)Oil Pan Baffle Bolt
(421)Oil Pan Baffle
(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
(546)Crankshaft Balancer Bolt
(551)Crankshaft Rear Oil Seal
(552)Flywheel
(553)Flywheel Bolt
(714)Oil Level Indicator Sensor
(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: 1226863 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
(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
(557)Throttle Cable Bracket Bolt
(558)Throttle Cable Bracket
(559)Throttle Body Support Bracket
(560)Throttle Body Support Bracket Bolt
(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 - Long
(570)Generator Brace Bracket Bolt - Short
(571)Generator Brace Bracket
(572)Intake Manifold Stud - Lower
(573)Intake Manifold Gasket - Upper
(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
(586)Fuel Schrader Valve
(587)Fuel Sevice Port
(727)Engine Coolant Temperature Sensor
(732)MAP Sensor
(733)MAP Sensor Seal
(734)MAF Sensor Bolt
(735)MAF Sensor
(736)MAF Sensor Seal
(737)IAC Sensor Seal
(738)IAC Sensor
(739)IAC Sensor Bolt
(740)TPS Sensor Seal
(741)TPS Sensor
(742)TPS Sensor Bolt
Figure 4:

Supercharger and Components
Object Number: 1226864 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
(501)Supercharger Oil Filter 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
(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 - Lower
(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
(557)Throttle Cable Bracket Bolt
(558)Throttle Cable Bracket
(559)Throttle Body Support Bracket
(560)Throttle Body Support Bracket Bolt
(561)Fuel Injector Retaining Clip
(562)Fuel Injector
(584)Supercharger Assembly
(586)Fuel Schrader Valve
(587)Fuel Service Port Cap
(723)BARO Sensor
(724)MAP Sensor
(725)MAP/BARO Sensor Bracket
(726)MAP/BARO Sensor Bracket bolt
(727)Engine Coolant Temperature Sensor
(734)MAF Sensor Bolt
(735)MAF Sensor
(736)MAF Sensor Seal
(737)IAC Sensor Seal
(738)IAC Sensor
(739)IAC Sensor Bolt
(740)TPS Sensor Seal
(741)TPS Sensor
(742)TPS Sensor Bolt
(747)MAP/BARO Sensor Retaining Clip
(747)MAP/BARO Sensor Retaining Clip
Figure 5:

Cylinder Head and Components - Left - L36
Object Number: 1226865 Size: LF
(200)Cylinder Head
(201)Cylinder Head Bolt - Long
(202)Cylinder Head Bolt - Short
(203)Valve Seal - Exhaust
(204)Valve Spring
(204)Valve Spring
(205)Valve Stem Cap
(205)Valve Stem Cap
(206)Valve Stem Key
(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
(249)Valve Lifter Guide Bolt
(250)Valve Lifter Guide
(251)Valve Lifter
(252)Pushrod
(258)Valve Rocker Arm Cover Bolt Seal
(259)Valve Seal - Intake
(601)Exhaust Manifold Stud
(602)Engine Lift Bracket
(603)Engine Lift Bracket Nut
(604)Engine Lift Bracket Bolt
(610)Exhaust Manifold Nut
(613)Exhaust Manifold Stud - to Cylinder Head
(625)Exhaust Manifold Gasket - Left
(626)Exhaust Manifold - Left
(627)Exhaust Manifold Bolt - Left
(628)Exhaust Manifold Heat 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 - L67
Object Number: 1226867 Size: LF
(200)Cylinder Head
(201)Cylinder Head Bolt - Long
(202)Cylinder Head Bolt - Short
(203)Valve Seat - Exhaust
(204)Valve Spring
(204)Valve Spring
(205)Valve Stem Cap
(205)Valve Stem Cap
(206)Valve Stem Key
(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
(249)Valve Lifter Guide Bolt
(250)Valve Lifter Guide
(251)Valve Lifter
(252)Pushrod
(258)Valve Rocker Arm Cover Bolt Seal
(259)Valve Seal - Intake
(601)Exhaust Manifold Stud
(602)Engine Lift Bracket
(603)Engine Lift Bracket Nut
(604)Engine Lift Bracket Bolt
(610)Exhaust Manifold Nut
(613)Exhaust Manifold Stud - to Cylinder Head
(625)Exhaust Manifold Gasket - Left
(626)Exhaust Manifold - Left
(627)Exhaust Manifold Bolt - Left
(628)Exhaust Manifold Heat 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
(712)Drive Belt Tensioner - Supercharger
(713)Drive Belt Tensioner Nut - Supercharger
(744)Electronic Ignition Module Stud
(745)Electronic Ignition Module Bolt
(746)Electronic Ignition Module Bolt - to Intake
Figure 7:

Cylinder Head and Components - Right
Object Number: 1792442 Size: LF
(200)Cylinder Head
(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 - Small
(225)Thermostat Bypass Pipe - Lower
(226)Drive Belt Tensioner Bolt
(227)Drive Belt Tensioner
(228)Valve Rocker Arm Cover - RH
(229)Cylinder Head Expansion Plug
(257)Thermostat Bypass Pipe Seal - Lower - Large
(260)Cylinder Head Gasket - 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 - L36
(607)Heated Oxygen Sensor
(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 Pipe Bolt - to Cylinder Head
(636)Exhaust Manifold Heat Shield - Right - Upper
(637)Exhaust Manifold Heat Shield - Right - Lower
(655)Engine Sight Shield Bracket - L67