Engine - Revised Intake Manifold Torque Specification
File In Section: 6 - EngineBulletin No.: 77-61-18
Date: October, 1997
SERVICE MANUAL UPDATE
Subject:
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
Tightening Sequence:
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
Tightening Sequence:
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
Tightening Sequence:
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
Tightening Sequence:
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
Tightening Sequence:
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.).