Steps 46-98

Engine









NOTICE: Do not loosen or remove the crankshaft pulley bolt without first installing the special tools as instructed in this procedure. The crankshaft pulley and the crankshaft timing sprocket are not keyed to the crankshaft. The crankshaft, the crankshaft sprocket and the pulley are fitted together by friction, using diamond washers between the flange faces on each part. For that reason, the crankshaft sprocket is also unfastened if the pulley bolt is loosened. Before any repair requiring loosening or removal of the crankshaft pulley bolt, the crankshaft and camshafts must be locked in place by the special service tools or severe engine damage may occur.

NOTICE: During engine repair procedures, cleanliness is extremely important. Any foreign material (including any material created while cleaning gasket surfaces) that enters the oil passages, coolant passages or the oil pan, can cause engine failure.

NOTE: Due to the precision fit and timing of the balancer shaft assembly, it cannot be removed from the engine block.

NOTE: For additional information, refer to the exploded views under engine Assembly.

46. Remove the bolt and the KS.





47. Remove the 8 bolts and the crankcase vent oil separator.





48. Remove the 4 bolts and the oil filter adapter.
- Discard the gasket.





49. If equipped, remove the block heater.





50. Remove the crankshaft vent tube.





51. Remove the 2 engine cover studs (one shown).





52. Remove the 4 stud bolts and the coil-on-plugs from the valve cover.





53. Remove the oil level indicator.





54. Remove the CHT sensor.





55. Remove the bolts and the valve cover.





56. NOTICE: Failure to position the No. 1 piston at Top Dead Center (TDC) can result in damage to the engine. Turn the engine in the normal direction of rotation only.

Using the crankshaft pulley bolt, turn the crankshaft clockwise to position the No. 1 piston at Top Dead Center (TDC).

- The hole in the crankshaft pulley should be in the 6 o'clock position.





57. NOTICE: The Camshaft Alignment Plate 303-465 is for camshaft alignment only. Using this tool to prevent engine rotation can result in engine damage.

NOTE: The camshaft timing slots are offset. If the Camshaft Alignment Plate 303-465 cannot be installed, rotate the crankshaft one complete revolution clockwise to correctly position the camshafts.

Install the Camshaft Alignment Plate in the slots on the rear of both camshafts.





58. Remove the engine plug bolt.





59. NOTE: The Crankshaft TDC Timing Peg will contact the crankshaft and prevent it from turning past TDC. However, the crankshaft can still be rotated in the counterclockwise direction. The crankshaft must remain at the TDC position during the crankshaft pulley removal and installation.

Install the Crankshaft TDC Timing Peg.





60. NOTICE: The crankshaft must remain in the Top Dead Center (TDC) position during removal of the pulley bolt or damage to the engine can occur. Therefore, the crankshaft pulley must be held in place with the Crankshaft Damper Holding Tool and the bolt should be removed using an air impact wrench (1/2-in drive minimum).

NOTICE: The crankshaft sprocket diamond washer may come off with the crankshaft pulley. The diamond washer must be replaced; remove and discard the diamond washer. If the diamond washer is not installed, engine damage may occur.

Using the Crankshaft Damper Holding Tool and an air impact wrench, remove the crankshaft pulley.

- Remove and discard the crankshaft pulley bolt and washer.

- Remove the crankshaft pulley.

- Remove the diamond washer and discard.





61. NOTICE: Use care not to damage the engine front cover or the crankshaft when removing the seal.

Using the Oil Seal Remover, remove the crankshaft front oil seal.





62. Remove the 2 bolts and the CKP sensor.





63. Remove the bolts and the engine front cover.





64. Compress the timing chain tensioner in the following sequence.

1. Using a small pick, release and hold the ratchet mechanism.

2. While holding the ratchet mechanism in the released position, compress the tensioner by pushing the timing chain arm toward the tensioner.

3. Insert a paper clip into the hole to retain the tensioner.





65. Remove the 2 bolts and timing chain tensioner.





66. Remove the RH timing chain guide.





67. Remove the timing chain.





68. Remove the bolts and the LH timing chain guide.





69. NOTICE: Do not rely on the Camshaft Alignment Plate to prevent camshaft rotation. Damage to the tool or the camshaft can occur.

Using the flats on the camshaft to prevent camshaft rotation, remove the bolt and the exhaust camshaft sprocket.





70. NOTICE: The Camshaft Alignment Plate 303-465 is for camshaft alignment only. Using this tool to prevent engine rotation can result in engine damage.

Using the flats on the camshaft to prevent camshaft rotation, remove the bolt and the intake camshaft phaser and sprocket.





71. Remove the oil pump chain tensioner.

1. Release the tension on the tensioner spring.

2. Remove the tensioner and the shoulder bolts.





72. NOTE: Remove and discard the crankshaft sprocket diamond washer located behind the crankshaft sprocket.

NOTE: The oil pump chain sprocket must be held in place.

Remove the oil pump chain and sprockets.

1. Remove the bolt.

2. Remove the chain and sprockets.





73. Mark the position of the camshaft lobes on the No. 1 cylinder for assembly reference.





74. Remove the bolt and the Variable Camshaft Timing (VCT) solenoid.





75. Remove the plug and the VCT system oil filter from the intake camshaft thrust cap.





76. NOTICE: Failure to follow the camshaft loosening procedure can result in damage to the camshafts.

NOTE: Mark the location and orientation of each camshaft bearing cap.

Remove the camshafts from the engine.

- Loosen the camshaft bearing bolts in the sequence shown, one turn at a time. Repeat until all the tension is released.

- Remove the camshaft bearing caps.

- Remove the camshafts.





77. NOTE: If the camshafts and valve tappets are to be reused, mark the location of the valve tappets to make sure they are assembled in their original positions.

NOTE: The number on the valve tappets only reflects the digits that follow the decimal. For example, a tappet with the number 0.650 has the thickness of 3.650 mm.

Remove and inspect the valve tappets. For additional information, refer to Engine System - General Information Valve Tappet Inspection.

78. Remove the cylinder head.
- Remove and discard the cylinder head bolts.

- Remove the cylinder head.

- Remove and discard the cylinder head gasket.





79. Support the cylinder heads on a bench with the head gasket side up. Check the cylinder head distortion and the cylinder block distortion. For additional information, refer to Engine System - General Information Cylinder Head Distortion Cylinder Block Distortion.

80. Remove the cylinder head alignment dowels.





81. Remove the bolts and the oil pan.





82. Remove the bolts and the crankshaft rear oil seal with retainer.





83. Remove the bolts, oil pump pickup tube and gasket.





84. Remove the bolts and the oil pump.





85. Remove the bolts and the block-off plate.





86. Make sure the Crankshaft TDC Timing Peg is still installed and the engine is still at Top Dead Center (TDC).
- Rotate the crankshaft slowly clockwise until the crankshaft balance weight is up against the Crankshaft TDC Timing Peg.





87. Mark the balancer unit front shafts on the top for reference that the balancer unit is at TDC.





88. NOTICE: Due to the precision interior construction of the balancer unit, it should not be disassembled.

Remove the 4 bolts and the balancer unit.





89. Remove the Crankshaft TDC Timing Peg.





90. Before removing the pistons, inspect the top of the cylinder bores. If necessary, remove the ridge or carbon deposits from each cylinder using an abrasive pad or equivalent, following manufacturer's instructions.

91. NOTE: Clearly mark the connecting rods, connecting rod caps and connecting rod bearings in numerical order for correct orientation for reassembly.

Remove the connecting rod cap bolts and cap.





92. NOTICE: Do not scratch the cylinder walls or crankshaft journals with the connecting rod.

Using the Connecting Rod Installer, remove the piston/rod assembly from the engine block.

- Repeat the previous 2 steps until all the piston/rod assemblies are removed from the engine block.





93. Remove the bolts in the sequence shown.
- Remove the main bearing beam.

- Discard the bolts.





94. Remove the crankshaft from the engine block.





95. NOTE: If the main bearings are being reused, mark them in order for correct orientation and reassembly.

Remove the main bearings from the main bearing beam.





96. NOTE: If the main bearings are being reused, mark them in order for correct orientation and reassembly.

NOTE: The center bulkhead has the thrust bearing.

Remove the main bearings from the cylinder block.





97. NOTE: If the oil squirters are being reused, mark them in order for correct location during reassembly.

NOTE: The front bulkhead does not have an oil squirter.

Remove the 4 oil squirters.





98. Inspect the cylinder block, main bearing beam, pistons and connecting rods. For additional information, refer to Engine System - General Information Procedures.