Part 3

Engine

Special Tool(s):

Special Tool(s):

Special Tool(s):

Disassembly (Steps 65-95)





65. Remove the 16 bolts and the rocker arm assemblies.





66. NOTE: Early build engines will have 8 rocker arm carrier-to-cylinder head bolts. Late build will have 2 rocker arm carrier-to-cylinder head bolts.

NOTE: Early build shown, late build similar.

NOTE: Left cylinder head shown, right cylinder head similar.

Remove the bolts and the rocker arm carrier.
^ Clean and inspect the gaskets.
^ Clean and inspect the sealing surfaces.





67. NOTE: Mark the location of the valve bridges before removing.

Remove the 16 valve bridges.





68. CAUTION: To prevent engine damage, keep the push rods in the order in which they were removed. Install all push rods back in their original positions.

Mark and remove the 16 push rods.





69. Remove the 10 outer head bolts.





70. Using the special tool, remove the cylinder heads.
1 Install the special tool.
2 Install the bolts.
^ Remove the cylinder heads.





71. Remove and discard the cylinder head gaskets.





72. Remove and discard the 4 cylinder head dowel sleeves.





73. Remove the bolts and the rear engine tube assembly.





74. CAUTION: To prevent engine damage, keep the cam followers in the order in which they were removed. Install all cam followers back in their original positions.

Remove the bolts, the roller follower guides and the hydraulic cam followers.





75. Remove the bolts and the upper oil pan.
^ Clean and inspect the gaskets. Install new gaskets if necessary.
^ Clean and inspect the sealing surfaces.





76. NOTE: Prior to removing any piston and connecting rod assemblies, it is recommended that piston protrusion be evaluated. This will help identify bent or twisted connecting rods.

Check the piston protrusion above the crankcase as follows:
^ Zero the dial indicator gauge on the crankcase deck surface.
^ Position the dial indicator tip on the piston head at the 3 or 9 o'clock position.
^ Rotate the crankshaft to measure the maximum piston protrusion and record.
^ Reposition the dial indicator tip onto the piston head at the opposite position.
^ Rotate the crankshaft to measure the maximum piston protrusion and record. Average the 2 readings to determine if the maximum piston protrusion is exceeded.





77. Using a feeler gauge, check for the minimum connecting rod side clearance.





78. Remove the bolts and the connecting rod caps.

79. CAUTION: To prevent engine damage, remove the ridge prior to removing the rod and piston assemblies if evident from the top of the cylinder bore. This reduces the chance of piston ring land damage during removal.

Use a razor knife or emery board to scrape the carbon ridge from the top of the cylinder bore.





80. Using a wood or plastic hammer handle, push the connecting rod and piston assembly out of the cylinder bore.





81. Remove the piston rings.
1 Remove the keystone ring.
2 Remove the intermediate compression ring.
3 Remove the oil control ring.





82. Remove and discard the connecting rod bearings.





83. Install the special tool and measure the camshaft gear backlash. Install a new gear if backlash is not within specification.





84. Install the special tool and measure the camshaft end play. Install a new camshaft thrust plate if end play is not within specification.





85. CAUTION: To prevent engine damage, do not remove the rear primary crankshaft flange bolts under any circumstances. If the flange is removed and reinstalled, it will result in engine vibration and premature transmission component wear.

Install the special tool and measure the crankshaft end play. Record the end play.





86. Remove the bolt and the crankshaft position (CKP) sensor.





87. Remove the bolt and the camshaft position (CMP) sensor.





88. Remove the block heater.





89. Remove the 20 lower case bolts and the 8 outside lower crankcase bolts. Remove the lower crankcase assembly.





90. Remove the lower crankcase seals and the lower bearings and discard.





91. Using the appropriate lifting device, remove the crankshaft assembly.





92. Remove and discard the crankshaft upper bearings and crankshaft upper thrust bearing.





93. CAUTION: Do not nick or scratch the camshaft bearings with the camshaft lobes or engine damage will occur.

Remove the thrust plate mounting bolts and remove the camshaft and gear.





94. CAUTION: This patch bolt is unique. Do not substitute or engine damage can occur.

Remove the bolts and the 8 piston cooling tubes.





95. Using the special tool, remove the camshaft bearings and discard.