The Intake Manifold

The removal of the upper intake manifold is the start of many service procedures like checking valve clearance and changing the spark plugs. I expect this page to be visited, or at least printed often. Comments, suggestions, and other helpful hints are always welcome.

Upper Intake Manifold | Lower Intake Manifold

INTAKE MANIFOLD, UPPER

Removal

1. Disconnect battery ground cable.

2. Remove engine appearance cover as described.

3. Remove right half of cowl vent screen.

4. Remove throttle body as described.

5. Disconnect the main emission vacuum supply hose from the surge tank vacuum fitting and EGR valve (EGR valve). Position vacuum supply hose out of the way.

6. Disconnect vacuum tube from intake manifold vacuum union.

7. Remove the two retaining bolts for the transducer mounting bracket from the surge tank. Position the transducer mounting bracket out of the way.

8. Remove the two intake manifold supports from the surge tank and cylinder head.

Transducer Mounting Bracket and Intake Manifold Support Installation

Item	Part Number	Description
1	95027-08016	Bolt (2 Req'd)
2	9J432	Transducer Mounting Bracket
3	A9908	Stud Bolt (2 Req'd)
4	95824-08035	Bolt (2 Req'd)
5	9J444	Intake Manifold Support (2 Req'd)
6	9D477	EGR Valve to Exhaust Manifold Tube
7	9D475	EGR Valve
A	--	Tighten to 18-28 N-m (14-20 Lb-Ft)
B	--	Tighten to 25-35 N-m (19-25 Lb-Ft)

9. Remove EGR valve.

10. Remove retaining bolts and surge tank stay from front of surge tank.

11. Remove bolt, nuts and surge tank stay from rear of surge tank.

12. Disconnect crankcase ventilation tube from valve cover.

13. Disconnect crankcase ventilation tube from surge tank.

14. Disconnect vacuum tube to fuel pressure regulator.

15. Disconnect RH crankcase ventilation hose and position aside.

16. Loosen intake air connector hose clamps and remove surge tank from engine.

Surge Tank Removal

Item	Part Number	Description
1	9424	Intake Manifold
2	8287	Hose Clamp
3	95024-08016	Flange Bolt
4	9J444	Rear Surge Tank Stay
5	95704-06500	Nut (2 Req'd)
6	90116-06606	Stud Bolt (2 Req'd)
7	9J444	Front Surge Tank Stay
8	95024-08016	Bolt (2 Req'd)
9	95024-08035	Bolt
10	9F722	Air Tube to Throttle Body Hose
A		Tighten to 18-28 N-m (14-20 Lb-Ft)
B		Tighten to 5-7 N-m (45-61 Lb-In)

17. Remove radio ignition interference capacitor bracket retaining bolt and position radio ignition interference capacitor aside.

18. CAUTION: When removing engine components, always remove retaining bolts in reverse of tightening sequence (as shown) or damage to engine components may occur. Remove intake manifold retaining bolts in standard loosening sequence.

19. Remove upper intake manifold and intake manifold upper gaskets from lower intake manifold and discard intake manifold upper gaskets.

Installation

1. CAUTION: New upper intake manifold gaskets must be used or damage to the engine may occur.

Position new upper intake manifold gaskets on lower intake manifold.

2. CAUTION: Upper intake manifold bolts must be tightened in sequence shown or damage to the engine may occur.

Position upper intake manifold on lower intake manifold and install retaining bolts. Tighten bolts in standard tightening sequence to 18-28 N-m (14-20 lb-ft).

3. Install radio ignition interference capacitor bracket and retaining bolt. Tighten retaining bolt to 8-12 N-m (71-106 lb-in).

4. Position surge tank on engine and align intake air connector clamps as shown. Tighten clamps securely.

Intake Air Connector Hose Clamp Orientation

Surge Tank Installation

5. Connect RH crankcase ventilation hose.

6. Connect vacuum tube from fuel pressure regulator to surge tank fitting.

7. Connect crankcase ventilation tube to surge tank fitting.

8. Connect crankcase ventilation tube to valve cover.

9. Install rear surge tank stay and retaining bolts and two nuts. Tighten bolt and nuts to 18-28 N-m (14-20 lb-ft).

10. Install front surge tank stay and retaining bolts. Tighten retaining bolts to 18-28 N-m (14-20 lb-ft).

11. Install EGR valve.

12. Install two intake manifold supports from surge tank to cylinder head. Tighten retaining bolts to 18-28 N-m (14-20 lb-ft).

13. Position transducer mounting bracket on surge tank and install retaining bolts. Tighten bolts to 18-28 N-m (14-20 lb-ft).

Transducer Mounting Bracket and Intake Manifold Support Installation

14. Connect vacuum tube to intake manifold vacuum union.

15. Connect main emission vacuum supply hose to the surge tank fitting and EGR valve.

16. Install throttle body as described.

17. Install right half of cowl vent screen.

18. Install engine appearance cover as described.

19. Connect battery ground cable.

INTAKE MANIFOLD, LOWER

Removal

1. Relieve fuel system pressure.

2. Disconnect battery ground cable.

3. Remove upper intake manifold as described above.

4. Disconnect fuel supply and return lines from fuel injection supply manifold.

5. Disconnect intake manifold runner control deactivation cable from lower intake manifold (IMRC). Remove cable from bracket and position aside.

6. Disconnect engine control sensor wiring from fuel injectors and wiring retainers. Position engine control sensor wiring out of the way.

7. If required, remove fuel injection supply manifold and fuel injectors from lower intake manifold (IMRC).

8. Remove lower intake manifold to cylinder head retaining bolts.

9. Remove lower intake manifold (IMRC) from cylinder heads.

Item	Part Number	Description
1	95027-08055	Bolt
2	9L490	Lower Intake Manifold (IMRC)
3	9439	Intake Manifold Gasket
4	6049	Cylinder Head
A	--	Tighten 18-28 N-m (14-20 Lb-Ft)

10. Remove intake manifold gaskets from cylinder heads and discard intake manifold gaskets.

Installation

1. Note: Verify operation of intake manifold runner control plate operation.

Follow removal procedure in reverse order using new intake manifold gaskets.

2. Tighten lower intake manifold retaining bolts to 18-28 N-m (14-20 lb-ft).

3. Connect fuel supply and return lines.

Contact Information