Exhaustst Manifold To Engine & Y-pipe Bolt Torques

[the hammer]

I have an 06 silvy w/ the 5.3L engine. What are the torques of the exhaust manifold bolts and the bolts/nuts that attach the manifold to the Y-pipe.

 

Thanks

[jrrod2004]

Service Information

 

2006 Chevrolet Chevy C Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 878378 Exhaust Manifold Replacement - Left Side (4.8L, 5.3L, and 6.0L Engine)

Removal Procedure

 

1. 
   
    
   
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
   
3. Remove the exhaust manifold pipe nuts.
   
4. Lower the vehicle.
   
5. Remove the spark plugs. Refer to Spark Plug Replacement .
   
    
   
6. Remove the exhaust manifold bolts, manifold, and gasket.
   
7. Discard the gasket.
   
    
   
8. Remove the heat shield bolts (3), and shield (2) from the exhaust manifold (1), if necessary.
   
9. Clean and inspect the exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection .
   

Installation Procedure

 

1. 
   
    
   Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
    
   
2. Install the heat shield (2), and bolts (3) to the exhaust manifold (1), if necessary.Tighten
   Tighten the bolts to 9 N·m (80 lb in).
    
    
   
    
   Important:

   • Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may affect vehicle emissions and/or On-Board Diagnostics (OBD) II system performance.

    

   • The cylinder head exhaust manifold bolt hole threads must be clean and free of debris or threadlocking material.

    

   
    
   Important: Do not apply sealant to the first three threads of the bolt.
    
   

3. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N 12345493 (Canadian P/N 10953488), or equivalent to the threads of the exhaust manifold bolts.
   
4. Install the exhaust manifold, NEW gasket and bolts.Tighten
   
   1. 
      
   2. Tighten the bolts a first pass to 15 N·m (11 lb ft). Tighten the bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
      
   3. Tighten the bolts a final pass to 25 N·m (18 lb ft). Tighten the bolts beginning with the center two bolts. Alternate from side-to-side, and work toward the outside bolts.
      

 

[*]Using a flat-punch, bend over the exposed edge of the exhaust manifold gasket at the rear of the left cylinder head.

[*]Install the spark plugs. Refer to Spark Plug Replacement .

[*]Raise the vehicle.

 

[*]Install the exhaust manifold pipe nuts.Tighten

Tighten the nuts to 50 N·m (37 lb ft).

 

[*]Lower the vehicle.

 

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

Service Information

 

2006 Chevrolet Chevy C Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 826358 Exhaust Manifold Replacement - Right Side (4.8L, 5.3L, and 6.0L Engines)

1. 
   
    
   
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
   
3. Remove the exhaust manifold pipe nuts.
   
4. Lower the vehicle.
   
5. Remove the oil level indicator tube. Refer to Oil Level Indicator and Tube Replacement .
   
6. Remove the spark plugs. Refer to Spark Plug Replacement .
   
    
   
7. Remove the exhaust manifold bolts, manifold, and gasket.
   
8. Discard the gasket.
   
    
   
9. Remove the heat shield bolts (1), and shield (2) from the exhaust manifold (1), if necessary.
   
10. Clean and inspect the exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection .
    

Installation Procedure

 

1. 
   Notice: Refer to

Fastener Notice in the Preface section.
 
 

 
Install the heat shield (2), and bolts (1) to the exhaust manifold (1), if necessary.Tighten
Tighten the bolts to 9 N·m (80 lb in).
 
 

 
Important:

• Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may affect vehicle emissions and/or On-Board Diagnostics (OBD) II system performance.

 

• The cylinder head exhaust manifold bolt hole threads must be clean and free of debris or threadlocking material.

 

 
Important: Do not apply sealant to the first three threads of the bolt.
 

Apply a 5 mm (0.2 in) wide band of threadlock GM P/N 12345493 (Canadian P/N 10953488), or equivalent to the threads of the exhaust manifold bolts.
Install the exhaust manifold, NEW gasket and bolts.Tighten

[jrrod2004]

Service Information

2006 Chevrolet Chevy C Silverado - 2WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 1684766

--------------------------------------------------------------------------------

 

Fastener Tightening Specifications

Application

Specification

 

Metric

English

 

Catalytic Converter Coupling Nut

45 N·m

33 lb ft

 

Exhaust Gas Recirculation (EGR) Cooler Tube Nut (6.6L)

30 N·m

20 lb ft

 

Exhaust Hanger Bracket Bolt

12 N·m

106 lb in

 

Exhaust Heat Shield Bolt (Body Panel)

9 N·m

80 lb in

 

Exhaust Heat Shield Nut (Body Panel)

9 N·m

80 lb in

 

Exhaust Manifold Bolts (4.8L, 5.3L, and 6.0L)

 

First Pass

15 N·m

11 lb ft

 

Final Pass

25 N·m

18 lb ft

 

Exhaust Manifold Bolt/Nut (6.6L)

34 N·m

25 lb ft

 

Exhaust Manifold Bolt/Stud (4.3L)

30 N·m

22 lb ft

 

Exhaust Manifold Center Bolt (8.1L)

35 N·m

26 lb ft

 

Exhaust Manifold Heat Shield Bolt (4.3L, 4.8L, 5.3L, and 6.0L)

9 N·m

80 lb in

 

Exhaust Manifold Heat Shield Bolt (6.6L)

8 N·m

71 lb in

 

Exhaust Manifold Heat Shield Bolt/Nut (8.1L)

25 N·m

18 lb ft

 

Exhaust Manifold Nut (8.1L)

16 N·m

12 lb ft

 

Exhaust Manifold Pipe Nut

50 N·m

37 lb ft

 

Exhaust Muffler Hanger Nut

50 N·m

39 lb ft

 

Exhaust Muffler Nut

40 N·m

30 lb ft

 

Exhaust Outlet Pipe Clamp (6.6L)

15 N·m

11 lb ft

 

Exhaust Outlet to Right Exhaust Pipe Bracket Bolt (6.6L)

34 N·m

25 lb ft

 

Exhaust Pipe Clamp

44 N·m

33 lb ft

 

Exhaust Pipe Hanger Bracket Bolt

12 N·m

106 lb in

 

Exhaust Pipe Hanger Bracket Bolt (4L60-E)

17 N·m

13 lb ft

 

Exhaust Pipe Heat Shield Bolt (6.6L)

8 N·m

71 lb in

 

Exhaust Pipe to Manifold Bolt (6.6L)

53 N·m

39 lb ft

 

Exhaust Pipe to Turbocharger Bolt (6.6L)

53 N·m

39 lb ft

 

Hood Hinge Bolt

25 N·m

18 lb ft

 

Intake Manifold Cover Clamp (6.6L)

6 N·m

53 lb in

 

Oil Level Indicator Tube Bracket Bolt (6.6L)

21 N·m

15 lb ft

 

Outlet Duct Clamp

6 N·m

53 lb in

 

Oxygen Sensor

42 N·m

31 lb ft

 

Rear Shock Absorber Lower Bolt

95 N·m

70 lb ft

 

Spark Plug (4.3L)

15 N·m

11 lb ft

 

Spark Plug Wire Retainer Bolt (4.3L)

12 N·m

106 lb in

 

Transmission Bolt

100 N·m

74 lb ft

 

Transmission Fluid Fill Tube Nut (6.6L)

18 N·m

13 lb ft

 

Transmission Mount to Support Nut

40 N·m

30 lb ft

 

Transmission Support Crossmember Bolt

95 N·m

70 lb ft

 

Turbocharger Exhaust Pipe Bolt/Nut (6.6L)

53 N·m

39 lb ft

 

Turbocharger Exhaust Pipe Heat Shield Bolt (6.6L)

8 N·m

71 lb in

 

Turbocharger Heat Shield Bolt (6.6L)

9 N·m

80 lb in

 

© 2008 General Motors Corporation. All rights reserved.

[the hammer]

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