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Lower Intake Manifold - Revised Tightening Procedure

File in Section: 6 - Engine

Engine Oil or Coolant Leak (Install New Intake Manifold Gasket) #03-06-01-010B - (10/24/2003)
Engine Oil or Coolant Leak (Install New Intake Manifold Gasket)

Contents


Vehicles

2000-2003 Buick Century
2002-2003 Buick Rendezvous
1996 Chevrolet Lumina APV
1997-2003 Chevrolet Venture
1999-2001 Chevrolet Lumina
1999-2003 Chevrolet Malibu, Monte Carlo
2000-2003 Chevrolet Impala
1996-2003 Oldsmobile Silhouette
1999 Oldsmobile Cutlass
1999-2003 Oldsmobile Alero
1996-1999 Pontiac Trans Sport
1999-2003 Pontiac Grand Am, Montana
2000-2003 Pontiac Grand Prix
2001-2003 Pontiac Aztek
with 3.1L or 3.4L V-6 Engine (VINs J, E - RPOs LG8, LA1)

This bulletin is being revised to change the model Information. Please discard Corporate Bulletin Number 03-06-01-010A (Section 06 - Engine).


Condition

Some owners may comment on an apparent oil or coolant leak. Additionally, the comments may range from spots on the driveway to having to add fluids.


Cause

Intake manifold may be compromised allowing coolant, oil, or both to leak from the engine.


Correction

Install an improved design intake manifold gasket. The material used in the gasket has been changed in order to improve the sealing qualities of the gasket. When replacing the gasket, the intake manifold bolts must also be replaced and torqued to a revised specification. The new bolts will come with a pre-applied threadlocker on them.


Notice

An oil leak may result if the vertical bolts are not tightened before the diagonal bolts.

Diagonal bolts may require a crows foot to tighten.


Tighten

1. Tighten the vertical lower intake manifold bolts (1) to 7N·m (62 lb in).
2. Tighten the diagonal lower intake manifold bolts (2) to 7N·m(62 lb in).
3. Tighten the vertical lower intake manifold bolts (1) to 13N·m(115 lb in).
4. Tighten the diagonal lower intake manifold bolts (2) to 25N·m(18 lb ft).


Parts Information

Part Number

Description

Qty

89017279

Intake manifold Gasket

1

11588915

Intake manifold bolt - short

4

11588914

Intake manifold bolt - long

4


 
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