GM has a TSB about the new design gaskets and the new bolts for it. The
new gaskets have a different interior core and different fiber compound
to hold them together when the head/intake moves around.
Information is from best available sources and is accurate at the time
Engine Oil or Coolant Leak For 1996-2003
GM 3.1 & 3.4L VIN J & E Engines.
The AERA Technical Committee offers the following information regarding
engine oil or coolant leaks for 1996-2003 GM 3.1 or 3.4L VIN J & E
engines. The cause of this problem is related to a void in the intake
GM has designed a new intake manifold gasket (Part #89017279) to help
above-mentioned condition. The material used in the revised gasket has
been changed in
order to improve the sealing qualities of the gasket. When replacing the
gasket, the intake
manifold attaching bolts must also be renewed. These revised bolts have
thread locking compound. These bolts are available with Part #11588915
for the shorter
bolt and Part #11588914 for the longer bolt.
Before the installation of the intake, clean all intake manifold and
block surfaces of any
debris and oils.
NOTICE: An oil leak may result if the vertical bolts are not tightened
before the diagonal bolts. Diagonal bolts may require a crows foot tool
1. Tighten the vertical lower intake manifold bolts to 62 in/lbs. (7
2. Tighten the diagonal lower intake manifold bolts to 62 in/lbs. (7
3. Tighten the vertical lower intake manifold bolts to 115 in/lbs. (13
4. Tighten the diagonal lower intake manifold bolts to 18 ft/lbs. (25
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