Replacing Cylinder head on Chrysler pacifica?

3.5L & 4.0L Engines Cylinder head removal.

In this chapter the details are for Chrysler Pacifica Cylinder head.

The cylinder head removal is as follows:---

3.5L & 4.0L Engines

Left Side

1. Properly relieve the fuel system pressure.
2. Drain the cooling system.
3. Remove or disconnect the following:
   
   
   Negative battery cable

   Engine cover

   Air cleaner assembly

   Radiator close out panel

   Radiator core support and fan assembly

   Fuel line from the rail

   Upper intake manifold

   Lower intake manifold

   Crankshaft damper

   Upper engine mount

   Upper drive belt idler pulley

   Belt tensioner

   Left exhaust manifold

   Exhaust cross over pipe

   Outer timing belt cover
4. Rotate the engine until it is at Top Dead center (TDC).
   
   NOTE

   Mark the timing belt running direction for installation. Align the camshaft sprockets with the marks on the rear covers.
   
   
   
   
   Timing belt tensioner and reset the tensioner
5. Pre-load the timing belt tensioner as follows:
   1. Place tensioner in a vise the same way it is mounted on the engine.
   2. Slowly compress the plunger into the tensioner body.
   3. Once the plunger is compressed, install a pin through the body and plunger to retain it in place until the tensioner is installed.
      
      
      Timing belt

      Left cylinder head cover

      Left rocker arm assembly

      Left rear camshaft thrust plate

      Holding the camshaft gear, unfasten the right cam gear retaining bolt
6. Push the camshaft about 3.5 inches out of the back of the cylinder head and remove the cam gear.
   
   
   Front timing belt housing-to-cylinder head bolts

   Cylinder head bolts in the reverse of tightening sequence. Refer to the cylinder head bolt tightening sequence illustration.

   Cylinder head and gasket

To install:

1. Thoroughly clean and dry the mating surfaces of the head and block.
   
   WARNING

   When cleaning the cylinder head and block mating surfaces, do not use a metal scraper because the soft aluminum surfaces could be cut or damaged. Instead, use a scraper made of wood or plastic.
2. Check the cylinder head for cracks, damage or engine coolant leakage. Check the head for flatness. End-to-end, the head should be within 0.002 in. (0.051mm) normally with 0.008 in. (0.203mm) the maximum allowed out of true. The resurface limit is 0.008 in. (0.203mm) maximum, the combined total dimension of stock removal from the cylinder head, if any, and block top surface.
3. Place a new head gasket on the cylinder block locating dowels, being sure the gasket is on the correct side.
4. Inspect the cylinder head bolts for necking (stretching) by holding a straightedge against the threads of each bolt. If all of the threads are not contacting the scale, the bolt should be replaced.
   
   WARNING

   Due to the cylinder head bolt torque method used, it is imperative that the threads of the bolts be inspected for necking prior to installation. If the threads are necked down, the bolt should be replaced. Failure to do so may result in parts failure or damage. New bolts are always recommended.
5. Install the cylinder head into position on the engine block and over the dowels. Install the cylinder head bolts, lubricating the threads with clean engine oil prior to installation.
6. Torque the cylinder head bolts using the proper sequence as follows:
   1. Step 1: torque in sequence to 45 ft. lbs. (61 Nm).
   2. Step 2: torque in sequence to 65 ft. lbs. (88 Nm).
   3. Step 3: torque in sequence to 65 ft. lbs. (88 Nm).
   4. Step 4: torque in sequence an additional ¹ / ₄ turn by using a torque angle meter. 
      
      NOTE

      Inspect the bolt torque after tightening. The torque should be over 90 ft. lbs. (122 Nm). If not, replace the cylinder head bolt.
      
      
      
      
      
      Fig. Cylinder head bolt tightening sequence-3.5L and 4.0L engines
7. Install or connect the following:
   
   
   Inner timing cover-to-cylinder head bolts and tighten to 40 ft. lbs. (54 Nm)

   Cam gear, holding the camshaft gear, fasten the right cam gear retaining bolt to 75 ft. lbs. (102 Nm) plus an additional ¹ / ₄ turn

   Rear camshaft thrust plate
8. Rotate the camshaft gear until it is properly aligned and check the left camshaft gear and crankshaft timing alignment marks.
   
   
   Timing belt

   Timing belt front cover

   Crankshaft damper

   Upper engine mount

   Belt tensioner

   Upper drive belt idler pulley

   Left exhaust manifold

   Exhaust cross over pipe

   Left rocker arm assembly

   Left cylinder head cover

   Lower drive belt idler pulley

   Lower intake manifold and fuel rail

   Upper intake manifold

   Fuel line to the rail

   Radiator core support and fan assembly

   Radiator close out panel

   Drive belt

   Air cleaner assembly

   Engine cover

   Negative battery cable

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

Right Side:--- 

1. Properly relieve the fuel system pressure.
2. Drain the cooling system.
3. Remove or disconnect the following:
   
   
   Negative battery cable

   Engine cover

   Air cleaner assembly

   Fuel line from the rail

   Upper intake manifold

   Lower intake manifold

   Right front wheel

   Right inner splash shield

   Drive belt

   Crankshaft damper using the proper puller

   Lower drive belt idler pulley

   Power steering bolts and set the pump aside

   Lower timing belt cover bolts

   Catalytic converter nuts

   Oxygen (O ₂ S) sensor electrical wiring at the exhaust manifold and catalytic converter

   Muffler-to-tail pipe union

   Catalytic converter

   Exhaust cross over pipe lower bolts

   Right exhaust manifold

   Upper drive belt idler pulley

   Belt tensioner
4. Support the engine with jackstands and wood blocks.
   
   
   Upper engine mount

   Power steering reservoir bolts and set aside

   All remaining outer timing belt cover bolts
5. Rotate the engine until it is at Top Dead center (TDC).
   
   NOTE

   Mark the timing belt running direction for installation. Align the camshaft sprockets with the marks on the rear covers.
   
   
   
   
   Timing belt tensioner and reset the tensioner
6. Pre-load the timing belt tensioner as follows:
   1. Place tensioner in a vise the same way it is mounted on the engine.
   2. Slowly compress the plunger into the tensioner body.
   3. Once the plunger is compressed, install a pin through the body and plunger to retain it in place until the tensioner is installed.
      
      
      Timing belt

      Right vale cover

      Exhaust Gas Recirculation (EGR) and tube assembly

      Right cylinder head cover

      Right rocker arm assembly

      Right rear camshaft thrust plate

      Holding the camshaft gear, unfasten the right cam gear retaining bolt
7. Push the camshaft about 3.5 inches out of the back of the cylinder head and remove the cam gear.
   
   NOTE

   On the 4.0L engine, due to clearance restrictions the front four cylinder head bolts must be loosened, raised and supported with a rubber band before the head can be removed.
   
   
   
   
   Inner timing cover-to-cylinder head bolts
   
   
   
   
   Cylinder head bolts in the reverse of tightening sequence. Refer to the cylinder head bolt tightening sequence illustration.

   Cylinder head and gasket.

To install:

1. Thoroughly clean and dry the mating surfaces of the head and block.
   
   WARNING

   When cleaning the cylinder head and block mating surfaces, do not use a metal scraper because the soft aluminum surfaces could be cut or damaged. Instead, use a scraper made of wood or plastic.
2. Check the cylinder head for cracks, damage or engine coolant leakage. Check the head for flatness. End-to-end, the head should be within 0.002 in. (0.051mm) normally with 0.008 in. (0.203mm) the maximum allowed out of true. The resurface limit is 0.008 in. (0.203mm) maximum, the combined total dimension of stock removal from the cylinder head, if any, and block top surface.
3. Place a new head gasket on the cylinder block locating dowels, being sure the gasket is on the correct side.
4. Inspect the cylinder head bolts for necking (stretching) by holding a straightedge against the threads of each bolt. If all of the threads are not contacting the scale, the bolt should be replaced.
   
   WARNING

   Due to the cylinder head bolt torque method used, it is imperative that the threads of the bolts be inspected for necking prior to installation. If the threads are necked down, the bolt should be replaced. Failure to do so may result in parts failure or damage. New bolts are always recommended.
5. Install the cylinder head into position on the engine block and over the dowels. Install the cylinder head bolts, lubricating the threads with clean engine oil prior to installation.
6. Torque the cylinder head bolts using the proper sequence as follows:
   1. Step 1: torque in sequence to 45 ft. lbs. (61 Nm).
   2. Step 2: torque in sequence to 65 ft. lbs. (88 Nm).
   3. Step 3: torque in sequence to 65 ft. lbs. (88 Nm).
   4. Step 4: torque in sequence an additional ¹ / ₄ turn by using a torque angle meter. 
      
      NOTE

      Inspect the bolt torque after tightening. The torque should be over 90 ft. lbs. (122 Nm). If not, replace the cylinder head bolt.
      
      
      
      
      Fig. Cylinder head bolt tightening sequence-3.5L and 4.0L engines
7. Install or connect the following:
   
   
   Inner timing cover-to-cylinder head bolts and tighten to 40 ft. lbs. (54 Nm)

   Cam gear, holding the camshaft gear, fasten the right cam gear retaining bolt to 75 ft. lbs. (102 Nm) plus an additional ¹ / ₄ turn

   Rear camshaft thrust plate
8. Rotate the camshaft gear until it is properly aligned and check the left camshaft gear and crankshaft timing alignment marks.
   
   
   Timing belt

   Timing belt outer cover

   Power steering reservoir

   Crankshaft damper

   Upper engine mount

   Belt tensioner

   Upper drive belt idler pulley

   Right exhaust manifold

   Exhaust cross over pipe

   Catalytic converter

   Muffler-to-tail pipe union

   O ₂ S sensor electrical wiring at the exhaust manifold and catalytic converter

   Right rocker arm assembly

   Right cylinder head cover

   EGR and tube assembly

   Lower drive belt idler pulley

   Right vale cover

   Lower intake manifold and fuel rail

   Upper intake manifold

   Fuel line to the rail

   Power steering pump

   Drive belt

   Air cleaner assembly

   Engine cover

   Right inner splash shield

   Right front wheel

   Negative battery cable

These details will help.

Thanks.           

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Car repair guide?

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