Intake Manifold - Revised Installation Procedure

87ford5

Article No. INTAKE MANIFOLD UPPER - 4.9L - REVISED
87-8-16 SHOP MANUAL INSTALLATION PROCEDURE


FORD - LIGHT TRUCK: 1987 E-SERIES, F-SERIES, BRONCO


ISSUE: The installation procedure for the upper intake manifold in the 1987 Light Truck Shop Manual, Volume B, Section 24-10-11 is incorrect. Tightening the upper intake manifold support bracket before the seven (7) manifold studs may cause the upper intake manifold to move. This may prevent the upper and lower manifolds from sealing properly and that causes a vacuum leak.


ACTION: When installing the upper intake manifold to the lower intake manifold, the seven (7) manifold studs MUST be tightened to 12-18 ft.lbs. (16.2-24.4 N-m) before tightening the manifold support bracket. The corrected procedure on page 29 of this TSB should be used in place of the 1987 Light Truck Shop Manual, Volume B, Section 24-10-11.

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"



4. Reposition the vacuum harness, then attach the vacuum connection to the fuel pressure regulator.

5. Install a new upper intake gasket on the lower manifold, using the lower manifold dowels to position the gasket.




6. Position the upper intake manifold onto the lower intake manifold, using the dowels of the lower intake to locate. Install the seven studs that attach the upper intake to the lower intake and tighten the seven studs to 16.2-24.4 N-m (12-18 ft.lbs).
7. Position the upper intake manifold support onto the boss of the upper intake, located under the throttle body. Install the retaining screw and tighten to 29.8-43.8 N-m (22-32 ft.lbs).




8. Install the injector heat shield between the lower intake manifold and the exhaust manifolds. Secure the shield to the lower intake manifold by installing the two spring clips between the intake runners.