1999 GM 6.5L V8 – Intake Manifold Replacement (Upper) – Removal Procedure

1. Disconnect both the battery negative cables from the batteries. Refer to Battery Cable in Engine Electrical.

2. Remove the upper intake manifold cover from the upper intake manifold.

3. Remove the brace (long for the L 65 and short for the L 56) from the turbocharger to the upper intake manifold. Refer to Turbocharger Replacement.

4. Remove the boost pressure sensor from the upper intake manifold. Refer to Boost Sensor Replacement in Engine Controls 6.5L.

5. Remove the intake air temperature sensor from the upper intake manifold. Refer to IAT Sensor Replacement in Engine Controls 6.5L.

6. Loosen the clamps on the hose between the turbocharger and the upper intake manifold.

Important: In order to loosen the sealer, run a small screw driver (flat blade) between the hose and the upper intake manifold. Use caution as not to damage the hose.

7. Loosen the hose connecting the upper intake manifold and the turbocharger.

8. Remove the EGR Valve (L 56 only) from the upper intake manifold. Refer to EGR Valve Replacement in Engine Controls-6.5L.

9. Remove the upper intake manifold bolts from the lower intake manifold.

Important: When removing the upper intake manifold, rotate the upper intake manifold in a downward then in a upward motion to help loose the silicone sealant on the air intake hose.

10. Remove the upper intake manifold and the gasket from the lower intake manifold.

11. Remove the upper intake manifold (L 65 shown) gasket from the lower intake manifold gasket.

12. Remove the upper intake manifold (L 56) gasket from the lower intake manifold gasket.

13. Remove the EGR valve sealing gasket (L 56 only) from the lower intake manifold.

 

Leave a Reply

Your email address will not be published. Required fields are marked *