Part 3

Camshaft

Special Tool(s)










Material(s)






92. Inspect the spark plug tube seals. Remove any damaged seals.

1. Using 303-1247/1 and 205-153 (T80T-4000-W) remove and discard the damaged seal(s).





93. Disconnect the EVAP (Evaporative Emission) canister vent solenoid and throttle body electrical connectors.

1. Detach the 2 wiring harness pin-type retainers.





94. Disconnect the EVAP (Evaporative Emission) vapor tube from the EVAP (Evaporative Emission) canister vent solenoid and position aside. REFER to Quick Connect Coupling Quick Connect Coupling.





95. Detach the 2 wiring harness/coolant tube retainers from the upper intake manifold.





96. Disconnect the crankcase ventilation hose from the PCV (Positive Crankcase Ventilation) valve. REFER to Quick Connect Coupling Quick Connect Coupling.





97. Remove the upper intake manifold support bracket bolt.





98. Remove the 7 bolts and the upper intake manifold.

1. Remove and discard the gasket.

2. Clean and inspect all of the sealing surfaces of the upper and lower intake manifold.





99. Disconnect the 3 RH (Right Hand) ignition coil electrical connectors.





100. Remove the 3 bolts and the RH (Right Hand) ignition coils.





101. Disconnect the HO2S (Heated Oxygen Sensor) electrical connector and detach the wiring harness retainer from the RH (Right Hand) valve cover.





102. Detach the 3 wire harness retainers from the main engine wiring harness on the RH (Right Hand) valve cover.





103. Disconnect the 2 VCT (Variable Camshaft Timing) oil control solenoid electrical connectors and detach the 2 wiring harness retainers.





104. Disconnect the 3 fuel injector electrical connectors and detach the 2 wiring harness retainers from the RH (Right Hand) valve cover stud bolts.





105. Detach the wiring harness retainer.





106. NOTICE: When removing valve cover do not apply excessive force to the VCT (Variable Camshaft Timing) oil control solenoid.

NOTICE: If the VCT (Variable Camshaft Timing) solenoid seal sticks to the VCT (Variable Camshaft Timing) oil control solenoid, then carefully wiggle the valve cover until the bond breaks free.

NOTE: The plastic electrical connector on the VCT (Variable Camshaft Timing) oil control solenoid will rotate approximately 12 degrees inside the steel housing, which is normal.

Loosen the 3 bolts and 8 stud bolts.

1. Remove the RH (Right Hand) valve cover.

2. Discard the gasket.





107. Inspect the 2 VCT (Variable Camshaft Timing) solenoid seals. Remove any damaged seals.

1. Using 205-142 (T80T-4000-J) and 205-153 (T80T-4000-W) remove and discard the damaged seal(s).





108. Inspect the spark plug tube seals. Remove any damaged seals.

1. Using 303-1247/1 and 205-153 (T80T-4000-W) remove and discard the damaged seal(s).





109. Remove the lower M10 engine front cover bolt.





110. Remove the 2 M10 engine front cover bolts.





111. Remove the 22 M8 engine front cover bolts.





112. Remove the M6 engine front cover bolt.





113. Using a suitable pry tool, locate the 7 pry pads shown and pry the engine front cover loose and remove.





114. Rotate the crankshaft clockwise and align the timing marks on the intake VCT (Variable Camshaft Timing) assemblies as shown.





115. Remove the 3 bolts and the LH (Left Hand) valve train oil tube.





116. NOTE: The 303-1248 will hold the camshafts in the TDC (Top Dead Center) position.

Install 303-1248 onto the flats of the LH (Left Hand) camshafts.





117. Remove the 3 bolts and the RH (Right Hand) valve train oil tube.





118. NOTE: The 303-1248 will hold the camshafts in the TDC (Top Dead Center) position.

Install 303-1248 onto the flats of the RH (Right Hand) camshafts.





119. NOTE: The following 3 steps are for primary timing chains that the colored links are not visible.

Mark the timing chain link that aligns with the timing mark on the LH (Left Hand) intake VCT (Variable Camshaft Timing) assembly as shown.





120. Mark the timing chain link that aligns with the timing mark on the RH (Right Hand) intake VCT (Variable Camshaft Timing) assembly as shown.





121. NOTE: The crankshaft sprocket timing mark should be between the 2 colored links.

Mark the 2 timing chain links that align with the timing mark on the crankshaft sprocket as shown.





122. Remove the 2 bolts and the primary timing chain tensioner.





123. Remove the primary timing chain tensioner arm.





124. Remove the 2 bolts and the lower LH (Left Hand) primary timing chain guide.





125. NOTE: Removal of the VCT (Variable Camshaft Timing) oil control solenoid will aid in the removal of the primary timing chain.

NOTE: A slight twisting motion will aid in the removal of the VCT (Variable Camshaft Timing) oil control solenoid.

NOTE: Keep the VCT (Variable Camshaft Timing) oil control solenoid clean of dirt and debris.

Remove the bolt and the LH (Left Hand) intake VCT (Variable Camshaft Timing) oil control solenoid.





126. NOTE: Removal of the VCT (Variable Camshaft Timing) oil control solenoid will aid in the removal of the primary timing chain.

NOTE: A slight twisting motion will aid in the removal of the VCT (Variable Camshaft Timing) oil control solenoid.

NOTE: Keep the VCT (Variable Camshaft Timing) oil control solenoid clean of dirt and debris.

Remove the bolt and the RH (Right Hand) intake VCT (Variable Camshaft Timing) oil control solenoid.





127. Remove the primary timing chain.





128. NOTE: The following steps are to remove the LH (Left Hand) camshafts.

NOTE: The 2 VCT (Variable Camshaft Timing) oil control solenoids are removed for clarity.

NOTE: The 303-1530 is inserted through a hole in the top of the mega cap.

Compress the LH (Left Hand) secondary timing chain tensioner and install the 303-1530 in the hole on the rear of the secondary timing chain tensioner guide and let it hold against the mega cap to retain the tensioner in the collapsed position.





129. Remove and discard the 2 LH (Left Hand) VCT (Variable Camshaft Timing) assembly bolts.





130. Remove the 2 LH (Left Hand) VCT assemblies and secondary timing chain.

1. Remove the 303-1530.





131. NOTE: When the 303-1248 is removed, valve spring pressure may rotate the LH (Left Hand) camshafts approximately 3 degrees to a neutral position.

Remove the 303-1248 from the LH (Left Hand) camshafts.





132. NOTE: Cylinder head camshaft bearing caps are numbered to verify that they are assembled in their original positions.

NOTE: Mark the exhaust and intake camshafts for installation into their original locations.

Remove the 12 bolts, 6 camshaft caps, mega cap and the LH (Left Hand) camshafts.





133. NOTE: The following steps are to remove the RH (Right Hand) camshafts.

NOTE: The 2 VCT (Variable Camshaft Timing) oil control solenoids are removed for clarity.

NOTE: The 303-1530 is inserted through a hole in the top of the mega cap.

Compress the RH (Right Hand) secondary timing chain tensioner and install the 303-1530 in the hole on the rear of the secondary timing chain tensioner guide and let it hold against the mega cap to retain the tensioner in the collapsed position.





134. Remove and discard the 2 RH (Right Hand) VCT (Variable Camshaft Timing) assembly bolts.





135. Remove the 2 RH (Right Hand) VCT (Variable Camshaft Timing) assemblies and secondary timing chain.

1. Remove the 303-1530.





136. NOTE: When the 303-1248 is removed, valve spring pressure may rotate the RH (Right Hand) camshafts approximately 3 degrees to a neutral position.

Remove the 303-1248 from the RH (Right Hand) camshafts.





137. NOTE: Cylinder head camshaft bearing caps are numbered to verify that they are assembled in their original positions.

NOTE: Mark the exhaust and intake camshafts for installation into their original locations.

Remove the 12 bolts, 6 camshaft caps, mega cap and the RH (Right Hand) camshafts.