Question 1

How to remove and install a cylinder head in 3.5L V6 engine on Chrysler 300?

Accepted Answer

It is necessary to have the needed special tools before starting this process. Start the removal by releasing fuel system pressure, removing the negative terminal of the battery and emptying off cooling system. After removing upper and lower intake manifolds, ignition coils, spark plugs, exhaust manifold from cylinder head(s), valve cover(s), rocker arms, shafts (if equipped) and timing belt along with its covers; pay attention to timing belt rotation direction if belt is to be reused. Loosen camshaft sprocket bolt with a wrench while holding sprocket hex and remove the thrust plate for camshaft allowing it to slid back. Make cardboard template for putting all cylinder head bolts together accurately after removing rear timing belt cover bolts. Remove each cylinder head mounting bolt in reverse tightening sequence, then store them accordingly. Lift the heads off engine making sure all bolts are removed and place on wooden blocks. If camshaft requires removal this should be done with head off. For installation make sure mating surfaces are clean, clear cylinders of any debris and check for damage. Chase threads in head bolt holes then replace any stretched bolts. Place new gasket over dowel pins checking that it matches up with down spout hole location and place head onto block without disrupting gasket. Tighten bolts recommendedly reasecure camshaft sprocket thrust plate put on rear timinig belt cover bolts or complete remaining steps as they were throughout installation procedure but backwards.Turn it off by changing oil and filter replacing coolant running engine checking for leaks.

Question 2

What precautions should be taken before beginning the procedure for removing and reinstalling the cylinder head in four cylinder engine on Chrysler Cirrus?

Accepted Answer

Allow the engine to cool completely before beginning this procedure. Position the number one piston at Top Dead Center. Disconnect the negative battery cable from the ground stud on the left shock tower. Drain the cooling system and remove the spark plugs. Remove the intake manifold and cover the intake ports on the manifold and cylinder head with duct tape to keep out foreign debris and contamination. Remove the bolts securing the power steering reservoir and hoses to the cylinder head and position them out of the way. Remove the exhaust manifold; it is easier to remove after the cylinder head is removed, if possible leave it attached. Disconnect the upper radiator hose from the thermostat housing and the electrical connector from the camshaft position sensor. Remove the timing belt, camshaft sprocket(s), and rear timing belt cover. On 2.0L engines, remove rocker arm shaft assemblies; on 2.4L engines, remove the camshafts, rocker arms, and valve lash adjusters. Remove the EGA valve from the cylinder head. Loosen the cylinder head bolts, 1/4-turn at a time, in the reverse order of the tightening sequence until they can be removed by hand, marking the locations of the different length bolts for reinstallation. Carefully lift the cylinder head straight up and place it on wood blocks to prevent damage to the sealing surfaces. If the head sticks to the engine block, dislodge it by placing a wood block against the head casting and tapping the wood with a hammer or by prying the head with a prybar placed carefully on a casting protrusion. Remove all traces of old gasket material from the block and head, being very careful not to gouge the sealing surfaces. Use special gasket removal solvents available at auto parts stores, and place clean shop rags into the cylinders to help keep out debris. Use a vacuum to remove any contamination from the engine and a tap of the correct size to chase the threads in the engine block. Clean and inspect all threaded fasteners for damage, and inspect the cylinder head bolt threads for "necking." If any cylinder head bolt exhibits damage or necking, it must be replaced. For installation, on 2.0L engines, install the camshaft if removed. Place a new gasket and the cylinder head in position on the engine block. Apply clean engine oil to the cylinder head bolt threads and install them back in their original locations. Tighten the cylinder head bolts in the sequence shown, progressing in three stages to the torque. After the third pass, tighten the bolts in the proper sequence an additional 90-degrees (1/4-turn) more. Before performing the final pass, mark the bolts in relation to the cylinder head and place another mark 90-degrees clockwise from the starting mark. Install the rocker arms and hydraulic valve lash adjusters. On 2.4L engines, install the rear timing belt cover, camshafts, and camshaft sprockets; on 2.0L engines, install the rear timing belt cover and camshaft sprocket. Install the timing belt, and after installation, slowly rotate the crankshaft by hand clockwise through two complete revolutions, then recheck the camshaft timing marks. Reinstall the remaining components in the reverse order of removal. Be sure to refill the cooling system and check all fluid levels. Start the engine and run it until normal operating temperature is reached, checking for leaks and proper operation.

OEM Chrysler Cylinder Head

55 Cylinder Heads found

Chrysler Cylinder Head Part Number: 68141352AD

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