GM Savana 6.6L Engine Cylinder head Removal?

In this chapter the details are provided for Cylinder head removal.
It covers Chevrolet and GM car models.
The details for 6.6L Engine Cylinder head removal.
Covers All U.S. And Canadian Models Of Chevrolet Avalanche, Express Van, and GM Savana.

The procedure is as follows:----


6.6L Engine

1. Relieve the fuel system pressure.
2. Drain the coolant system.
3. Remove or disconnect the following: 
   
   
   Negative battery cables

   Left or right front splash shield from the fender well, as applicable

   Turbocharger

   Turbocharger charged air cooler inlet duct

   Thermostat housing crossover

   Left or right intake manifold, as necessary

   Upper left or right valve cover

   Fuel rail assembly

   Left or right exhaust manifold

   Bolt and ground straps from the rear of the cylinder head

   Lower left or right valve cover

   Rocker arm shaft assembly

   Glow plugs

   Fuel injector return pipe eye bolts and washers

   Fuel injector return pipe assembly

   Fuel injector bracket bolts

   Fuel injectors with the brackets, using a suitable removal tool

   Injector bracket pins

   Cylinder head bolts, in the proper sequence

   Cylinder head and gasket. Discard the gasket 
   
   
   
   

   Fig. Cylinder head bolt loosening sequence-6.6L engines

To install:

1. Clean the mating surfaces of the heads and block thoroughly.
2. Position a new left or right side head gasket on the block. Note that the left and right side gaskets are NOT interchangeable.
   
   NOTE

   The cylinder head bolts on these vehicles are pre-coated with an application of a molybdenum disulfide for thread lubrication. Do not remove the coating or add any additional lubrication.
3. Install the cylinder head and bolts.
4. Tighten the cylinder head bolts, in sequence, as follows:
   1. Step 1: M12 bolts to 37 ft. lbs. (50 Nm).
   2. Step 2: M12 bolts to 59 ft. lbs. (80 Nm).
   3. Step 3: Using a torque angle meter, tighten the M12 bolts an additional 60 degrees.
   4. Step 4: Using a torque angle meter, tighten the M12 bolts an additional 60 degrees.
   5. Step 5: M8 bolts to 18 ft. lbs. (25 Nm). 
      
      
      
      Fig. Cylinder head bolt tightening sequence-6.6L engines
5. Install or connect the following:
   
   NOTE

   If you are reusing the old injectors, clean the carbon from the tips, but do not use a wire brush.
   
   
   
   
   New O-ring onto the fuel injectors after coating with clean engine oil

   New copper washer into the fuel injector bore in the cylinder head

   Fuel injector bracket pin
   
   
   
   
   Fuel injector bracket bolt and tighten to 37 ft. lbs. (50 Nm)

   Fuel injector return pipe assembly

   Fuel injector return pipe-to-injector eye bolts and washers. Tighten to 11 ft. lbs. (15 Nm).

   Fuel return pipe-to-cylinder head eye bolts and washers. Tighten to 11 ft. lbs. (15 Nm).

   Bolt and ground straps to the rear of the cylinder head. Tighten to 18 ft. lbs. (25 Nm).

   Valve rocker shaft assembly

   Lower and upper valve covers

   Glow plugs

   Exhaust manifold

   Fuel rail assembly

   Intake manifold

   Thermostat housing crossover

   Turbocharger charged air cooler duct

   Clamp and hose to the charged air cooler. Tighten to 53 inch lbs. (6 Nm).

   Turbocharger

   Fender splash shield

   Negative battery cables
6. Refill the cooling system with the proper type and quantity of antifreeze.
7. Evacuate and recharge the air conditioning system.

These details will help.

Thanks.           

FOR MORE HELP GO TO: ---

Car repair guide?

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