What is the torque spec for the 4.9L throttle body screws?

The 7/16-14 × 1.50 and 3/8-16 × .88 screw and washer assemblies are tightened to 29.8-43.4 N·m (22-32 ft-lb); the 5/16-18 nuts (45357-S8) are tightened to 18.9-27.1 N·m (14-20 ft-lb).

What is the part number for the gasket between the upper and lower intake manifolds on the 4.9L?

The gasket between the upper intake manifold (9424) and lower intake manifold (9K641) is base part number 9H486.

How many studs are required to join the 4.9L upper and lower intake manifolds?

Seven 5/16-18 × 2.505 studs are required (marked '5/16-18 × 2.505 STUD (7 REQ'D)').

What part number is the 4.9L throttle body assembly and its gasket?

The throttle body assembly is 9E926 and its gasket is 9E936, mounted with support bracket 9J444.

How is the intake manifold heat shield attached on the 4.9L?

The intake manifold heat shield (9F460) is retained with spring clips, part number 390717.

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Ford 4.9L Intake Manifold Installation Diagram - Parts & Torque Specs (TSB 87-08-16)

4.9L intake installation exploded view with part numbers and torque specs

TSB 87-08-16: INTAKE MANIFOLD UPPER - 4.9L - REVISED 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-lb (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-lb).
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-lb).
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.

See also:
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Owner caption November 2025 · Photo 0 of 5000

This document is an exploded parts and installation diagram for the intake manifold system of the Ford 4.9L inline-six engine, titled "4.9L Intake Installation." The left illustration shows an exploded view of the upper intake manifold (9424), lower intake manifold (9K641), the gasket between them (9H486), the vacuum tree (9D496), PCV connector (390659-S100), air charge temperature sensor (12A967), and the seven required 5/16-18 × 2.505 studs. The upper-right illustration details the throttle body assembly (9E926) installation at the front of the engine, including its gasket (9E936), support bracket (9J444), and fastener torque specifications: 7/16-14 × 1.50 screw-and-washer assemblies and 3/8-16 × .88 screw-and-washer assemblies both torqued to 29.8-43.4 N·m (22-32 ft-lb), and 5/16-18 nuts (45357-S8) torqued to 18.9-27.1 N·m (14-20 ft-lb). The lower-right illustration shows the assembled manifold on the engine with runner references (#2 through #5), the intake manifold heat shield (9F460), and its spring clips (390717). Readers can use this document to identify Ford part base numbers, hardware sizes, and torque values needed to remove or install the intake manifolds and throttle body on a fuel-injected 4.9L engine.

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Frequently asked questions

What is the torque spec for the 4.9L throttle body screws?: The 7/16-14 × 1.50 and 3/8-16 × .88 screw and washer assemblies are tightened to 29.8-43.4 N·m (22-32 ft-lb); the 5/16-18 nuts (45357-S8) are tightened to 18.9-27.1 N·m (14-20 ft-lb).
What is the part number for the gasket between the upper and lower intake manifolds on the 4.9L?: The gasket between the upper intake manifold (9424) and lower intake manifold (9K641) is base part number 9H486.
How many studs are required to join the 4.9L upper and lower intake manifolds?: Seven 5/16-18 × 2.505 studs are required (marked '5/16-18 × 2.505 STUD (7 REQ'D)').
What part number is the 4.9L throttle body assembly and its gasket?: The throttle body assembly is 9E926 and its gasket is 9E936, mounted with support bracket 9J444.
How is the intake manifold heat shield attached on the 4.9L?: The intake manifold heat shield (9F460) is retained with spring clips, part number 390717.