Silverado and Sierra Exhaust Manifold replacing Procedure?

How to replace Exhaust Manifold on Chevrolet Silverado and How to replace Exhaust Manifold on GMC sierra car models.

The details and procedure for this is mentioned below.

The Procedure is for 4.3L engine and 6.6L engine.

Also help diagram is provided to make this repair easy.

4.3L Engines

1. Remove or disconnect the following:
   
   
   Negative battery cable
   

   Engine cover, if equipped
   

   Exhaust pipe from the exhaust manifold
   

   Spark plug wires from the plugs and the retaining clips
   

   Heat shields
   
   
   
   1. Remove the spark plugs, dipstick tube and wiring, if necessary.
2. Unbend the exhaust manifold bolt lock tangs.
3. Remove or disconnect the following:
   
   
   Exhaust manifold retaining bolts, washers and tab washers
   

   Exhaust manifold
   

   Old gaskets and discard
   

To install:

1. Clean the gasket mounting surfaces.
2. Inspect the exhaust manifold for distortion, cracks or damage; replace if necessary.
3. Install or connect the following:
   
   
   Exhaust manifold to the cylinder using a new gasket.
   
4. Tighten the exhaust manifold bolts and stud on the first pass to 11 ft. lbs. (5 Nm).
5. Tighten the exhaust manifold bolts and stud on the final pass to 22 ft. lbs.(30 Nm).
   
   NOTE

   Once the bolts are tightened, bend the tabs on the washers back over the heads of all bolts in order to lock them in position.
   
   
   
   
   Spark plugs
   

   Dipstick tube
   

   Spark plug wires to the retainer clips and plugs
   

   Exhaust pipe to the manifold
   

   Engine cover (if equipped)
   

   Negative battery cable
   

6.6L Engine
Left Side

1. Raise the vehicle.
2. Remove or disconnect the following:
   
   
   Bolts securing the left exhaust pipe heat shield and move the heat shield aside
   

   Left exhaust pipe-to-manifold bolts
   

   Left front wheel
   

   Left front fender splash shield
   

   Charge air cooler duct
   

   Exhaust manifold heat shield bolts and shield
   

   2 nuts and 6 bolts with the plain washer and bell view washer from the left manifold
   

   Exhaust manifold by removing it from the rear, then the front studs and sliding it out the bottom, past the oil filter
   

   Exhaust manifold gasket and discard
   

To install:

1. Installation is the reverse of the removal procedure. Tighten the retainers as follows:
   1. Exhaust manifold nuts and bolts, in sequence, in 2 passes to 25 ft. lbs. (34 Nm). 
      
      
      
      Fig. Left and right side exhaust manifold bolt removal and installation sequence-6.6L engines
   2. Heat shield bolts: 71 inch lbs. (8 Nm).
   3. Exhaust pipe-to-manifold bolts: 39 ft. lbs. (59 Nm).

Right Side

1. Raise the vehicle.
2. Remove or disconnect the following:
   
   
   Right front wheel

   Right front fender splash shield

   Exhaust manifold heat shield bolts and shield

   Right exhaust pipe-to-manifold bolts

   2 nuts and 6 bolts with the plain washer and bell view washer from the left manifold

   Exhaust manifold by removing it from the rear, then the front studs and sliding it out the bottom, past the oil filter

   Bolt for the oil level dipstick tube, to remove the gasket

   Exhaust manifold gasket and discard

To install:

1. Installation is the reverse of the removal procedure. Tighten the retainers as follows:
   1. Oil level dipstick tube: 15 ft. lbs. (20 Nm).
   2. Exhaust manifold nuts and bolts, in sequence, in 2 passes: 25 ft. lbs. (34 Nm).
   3. Heat shield bolts: 71 inch lbs. (8 Nm).
   4. Exhaust pipe-to-manifold bolts: 39 ft. lbs. (59 Nm).

These details will help.

Thanks.           

FOR MORE HELP GO TO: ---

Car repair guide?

http://technoanswers.blogspot.in/2012/03/car-repair-guide.html