How to Replace Cylinder Head on Buick LaCrosse 3.8L Engine?

The details to replace Cylinder head on 3.8L Engine is as follows:----

Cylinder Head
REMOVAL & INSTALLATION Procedure is as follows:----



3.8L Engine

1. Before servicing the vehicle, refer to the Precautions Section.
2. Disconnect the negative battery cable.
3. Relieve the fuel system pressure.
4. Drain the cooling system.
5. Remove or disconnect the following:
   
   
   Intake manifold

   Exhaust manifold

   Valve covers

   Ignition wires and ignition coil/module assembly

   Alternator front mounting bracket and alternator

   Air conditioning bracket to cylinder head bolt

   Power steering pump

   Accessory drive belt tensioner

   Fuel pipe heat shield

   Rocker arm assemblies, note their original position

   Pushrods and guide plate

   Cylinder head bolts

   Cylinder head

To install:

1. Place the new cylinder head gasket on the engine block dowels with the noteTHIS SIDE UP facing the cylinder head and the arrow facing the front of the engine. Position the cylinder head on the engine block. 
   
   NOTE

   The head gasket is identified by either a L or a R stamped on it next to the arrow.
   
   
   
   NOTE

   This engine uses special torque to yield head bolts. The procedure must be followed carefully and new bolts must be used whenever the head is removed. Total bolt torque should not exceed 60 ft. lbs. (81 Nm).
   
   
   
   
   

   

   Fig. Cylinder head bolt torque sequence-3.8L engine
2. Install new cylinder head bolts and torque them in sequence as follows:
   1. Step 1: 37 ft. lbs. (50 Nm).
   2. Step 2: Plus 120°.
3. Install or connect the following:
   
   NOTE

   Apply a thread lock compound to the rocker arm pedestal bolts before assembly.
   
   
   
   
   Pushrods and guide plate

   Rocker arm assemblies into their original location
   
   
   
   
   Valve covers

   Fuel pipe heat shield

   Accessory drive belt tensioner

   Power steering pump

   Air conditioning compressor bracket bolt. Torque it to 52 ft. lbs. (70 Nm).

   Alternator front mounting bracket, and alternator

   Ignition coil/module assembly and spark plug wires

   Exhaust manifold. Torque the bolts to 22 ft. lbs. (30 Nm).

   Intake manifold

   Negative battery cable
4. Refill and bleed the cooling system.
5. Start the engine and check for leaks and proper operation.

These details will help.

Thanks.

FOR MORE HELP GO TO: ---

Car repair guide?

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