For 1990-2009 cars

# SMU-SEC. 6A8 OR 6 REV. UPPER/LOW INTAKE

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION 6A8 OR 6 - REVISED UPPER AND LOWER INTAKE MANIFOLD FASTENER TIGHTENING SPECIFICATION

#### MODELS: 1995-97 BUICK PARK AVENUE, RIVIERA (VIN K) 1996-97 BUICK LESABRE, REGAL (VIN K) 1996-97 BUICK PARK AVENUE, RIVIERA (VIN 1) 1997 BUICK REGAL (VIN 1) 1995-97 CHEVROLET CAMARO (VIN K) 1995-96 OLDSMOBILE NINETY EIGHT (VIN K) 1995-97 OLDSMOBILE EIGHTY EIGHT, LSS (VIN K) 1996-97 OLDSMOBILE LSS (VIN 1) 1997 OLDSMOBILE REGENCY (VIN K) 1995-97 PONTIAC BONNEVILLE, FIREBIRD (VIN K) 1996-97 PONTIAC GRAND PRIX (VIN K) 1996-97 PONTIAC BONNEVILLE (VIN 1) 1997 PONTIAC GRAND PRIX (VIN 1) WITH 3800 ENGINE (VINS K, 1 -- RPOS L36, L67)

THIS BULLETIN CANCELS AND SUPERSEDES THESE PREVIOUS BULLETINS: 57-61-18 (SECTION 6--ENGINE) 57-61-21 (SECTION 6--ENGINE) 67-61-18 (SECTION 6--ENGINE)

LOWER INTAKE MANIFOLD (L36 - C, G, H, W CARS)

ART 35806 FIGURE 1 LOWER INTAKE MANIFOLD ART 44774 FIGURE 2 LOWER INTAKE MANIFOLD TIGHTENING SEQUENCE

#### INSTALLATION PROCEDURE

1. INSTALL THE LOWER INTAKE MANIFOLD GASKET 2. INSTALL THE LOWER INTAKE MANIFOLD 3. APPLY GM P/N 12345382 THREADLOCKER OR EQUIVALENT ON THE BOLT THREADS 4. INSTALL THE LOWER INTAKE MANIFOLD BOLTS INCLUDING THE TWO HIDDEN BOLTS

#### TIGHTEN

TIGHTEN THE LOWER INTAKE MANIFOLD BOLTS IN SEQUENCE TO 15 N.M (11 LB FT)

LOWER INTAKE MANIFOLD (L67 - C, G, H, W CARS)

ART 154536 FIGURE 3 LOWER INTAKE MANIFOLD ART 211918 FIGURE 4 LOWER INTAKE MANIFOLD TIGHTENING SEQUENCE

#### INSTALLATION PROCEDURE

1. INSTALL THE LOWER INTAKE MANIFOLD GASKET 2. INSTALL THE LOWER INTAKE MANIFOLD 3. APPLY GM P/N 12345382 THREADLOCKER OR EQUIVALENT ON THE BOLT THREADS 4. INSTALL THE LOWER INTAKE MANIFOLD BOLTS INCLUDING THE TWO HIDDEN BOLTS

#### TIGHTEN

TIGHTEN THE LOWER INTAKE MANIFOLD BOLTS IN SEQUENCE TO 15 N.M (11 LB FT)

LOWER INTAKE MANIFOLD (L36 - F CAR)

ART 50046 FIGURE 5 LOWER INTAKE MANIFOLD ART 50288 FIGURE 6 LOWER INTAKE MANIFOLD TIGHTENING SEQUENCE

#### INSTALLATION PROCEDURE

1. INSTALL THE LOWER INTAKE MANIFOLD GASKET 2. INSTALL THE LOWER INTAKE MANIFOLD 3. APPLY GM P/N 12345382 THREADLOCKER OR EQUIVALENT ON THE BOLT THREADS 4. INSTALL THE LOWER INTAKE MANIFOLD BOLTS

#### TIGHTEN

TIGHTEN THE LOWER INTAKE MANIFOLD BOLTS IN SEQUENCE TO 15 N.M (11 LB FT)

UPPER INTAKE MANIFOLD (L36 - F)

ART 36634 FIGURE 7 UPPER INTAKE MANIFOLD ART 50287 FIGURE 8 UPPER INTAKE MANIFOLD TIGHTENING SEQUENCE

#### INSTALLATION PROCEDURE

1. INSTALL THE UPPER INTAKE MANIFOLD GASKET 2. INSTALL THE UPPER INTAKE MANIFOLD 3. INSTALL THE WATER OUTLET 4. INSTALL THE UPPER INTAKE MANIFOLD BOLTS

#### TIGHTEN

- TIGHTEN THE VERTICAL BOLTS IN SEQUENCE TO 15 N.M (11 LB FT) - TIGHTEN THE WATER OUTLET BOLTS IN SEQUENCE TO 27 N.M (20 LB FT) - TIGHTEN SIDE BOLTS IN SEQUENCE TO 30 N.M (22 LB FT)

UPPER INTAKE MANIFOLD (L36 - C, G, H, W CARS)

ART 42225 FIGURE 9 UPPER INTAKE MANIFOLD ART 49828 FIGURE 10 UPPER INTAKE MANIFOLD TIGHTENING SEQUENCE

#### INSTALLATION PROCEDURE

1. INSTALL THE UPPER INTAKE MANIFOLD GASKET 2. INSTALL THE UPPER INTAKE MANIFOLD 3. INSTALL THE UPPER INTAKE MANIFOLD BOLTS AND STUD

#### TIGHTEN

TIGHTEN THE UPPER INTAKE MANIFOLD BOLTS AND STUD IN SEQUENCE TO 10 N.M (89 LB IN)

FIGURES: 10 ATTACHMENTS: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

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