Cylinder Head: Other Honda Pilot II

Front

Note. Identify parts as they are removed so they can be reinstalled in their original locations. Inspect the rocker shafts and rocker arms (see ROCKER ARM AND SHAFT INSPECTION ). If reused, the rocker arms must be installed in their original locations. When removing or installing the rocker arm assembly, do not remove the mounting bolts. The bolts will keep the rocker arms, the rocker shaft bridge, and the rocker shaft holder on the shaft. If the rocker shaft cannot be removed or installed by hand, remove or install the rocker shaft by heating the rocker shaft bridge. Bundle the rocker arms with rubber bands to keep them together as a set, and remove the bands after the rocker arms have been installed. Prior to reassembling, clean all the parts in solvent, dry them, and apply new engine oil to all contact points and bearing surfaces and lost motion assembly. When replacing the rocker arm assembly, remove the fastening hardware from the new rocker arm assembly. Never remove any of the circlips that retain the lost motion assemblies in the rocker shaft bridge. The circlips are not available separately, and are factory installed in the rocker shaft bridge. To remove the lost motion assemblies, first remove the rocker shafts and the rocker arms.

Scheme 270

Rear

Note. Identify parts as they are removed so they can be reinstalled in their original locations. Inspect the rocker shafts and rocker arms (see ROCKER ARM AND SHAFT INSPECTION ). If reused, the rocker arms must be installed in their original locations. When removing or installing the rocker arm assembly, do not remove the mounting bolts. The bolts will keep the rocker arms, the rocker shaft bridge, and the rocker shaft holder on the shaft. If the rocker shaft cannot be removed or installed by hand, remove or install the rocker shaft by heating the rocker shaft bridge. Bundle the rocker arms with rubber bands to keep them together as a set, and remove the bands after the rocker arms have been installed. Prior to reassembling, clean all the parts in solvent, dry them, and apply new engine oil to all contact points and bearing surfaces, and the lost motion assembly. When replacing the rocker arm assembly, remove the fastening hardware from the new rocker arm assembly. Never remove any of the circlips that retain the lost motion assemblies in the rocker shaft bridge. The circlips are not available separately, and are factory installed in the rocker shaft bridge. To remove the lost motion assemblies, first remove the rocker shafts and the rocker arms.

Scheme 271

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1. Remove the rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(ref-333551-S21740312542009072100000) ).
2. Disassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(ref-333551-S27240906312009072100000) ).
3. Measure the diameter of the shaft at the first rocker location.
4. Zero the gauge (A) to the shaft diameter.
5. Measure the inside diameter of the rocker arm, and check it for an out-of-round condition. No. 1, No. 2, No. 3 and No. 4 CYLINDERS Intake Rocker Arm-to-Shaft Clearance: Standard (New): 0.015-0.046 mm (0.0006-0.0018 in) Service Limit: 0.046 mm (0.0018 in) No. 5, and No. 6 CYLINDERS Intake Rocker Arm-to-Shaft Clearance: Standard (New): 0.018-0.056 mm (0.0007-0.0022 in) Service Limit: 0.056 mm (0.0022 in) No. 1, No. 2, No. 3 and No. 4 CYLINDERS Exhaust Rocker Arm-to-Shaft Clearance Standard (New): 0.015-0.046 mm (0.0006-0.0018 in) Service Limit: 0.046 mm (0.0018 in) No. 5 and No. 6 CYLINDERS Exhaust Rocker Arm-to-Shaft Clearance Standard (New): 0.018-0.047 mm (0.0007-0.0019 in) Service Limit: 0.047 mm (0.0019 in)
6. Repeat for all rockers and both shafts. If the clearance is over the limit, replace the rocker shaft and all over-tolerance rocker arms. If any variable cylinder management rocker arm needs replacement, replace all rocker arms in that set (primary and secondary). Variable Cylinder Management Rocker Arms
7. Inspect the rocker arm pistons (A). Slide them into the rocker arms. If they do not move smoothly, replace the rocker arm set. NOTE: Apply new engine oil to the rocker arm pistons when reassembling. When removing the rocker arm pistons from the intake primary rocker arm (B) and the exhaust primary rocker arms (C), carefully apply air pressure to the oil passage of the rocker arm. INTAKE EXHAUST
8. Install the rocker arm assembly (see «CAMSHAFT, ROCKER ARM ASSEMBLY, CAMSHAFT SEAL, AND PULLEY INSTALLATION»(ref-333551-S20923989242009072100000) ).

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1. Remove the cylinder head (see «CYLINDER HEAD REMOVAL»(ref-333551-S41411568312009072100000) ).
2. Remove the rocker arm assembly (see «ROCKER ARM ASSEMBLY REMOVAL»(ref-333551-S21740312542009072100000) ).
3. Disassemble the rocker arm assembly ( «Rocker Arm and Shaft Disassembly/Reassembly»(ref-333551-S27240906312009072100000) )
4. Front: Put the rocker shafts bridge and the rocker shaft holder on the front cylinder head, then tighten the bolts to the specified torque. Specified Torque 8 x 1.25 mm: 22 N.m (2.2 kgf.m, 16 lbf.ft)
5. Rear: Put the rocker shaft bridge and the rocker shaft holder on the rear cylinder head, then tighten the bolts to the specified torque. Specified Torque 8 x 1.25 mm: 22 N.m (2.2 kgf.m, 16 lbf.ft)
6. Seat the camshaft by pushing it toward the rear of the cylinder head.
7. Zero the dial indicator against the end of the camshaft. Push the camshaft back and forth and read the end play. If the end play is beyond the service t limit, replace the thrust cover and recheck. If it is still beyond the service limit, replace the camshaft. Camshaft End Play Standard (New): 0.05-0.20 mm (0.002-0.008 in) Service Limit: 0.20 mm (0.008 in)
8. Remove the camshaft thrust cover (A), then pull out the camshaft (B).
9. Wipe the camshaft clean, then inspect the lift ramps. Replace the camshaft if any lobes are pitted, scored, or excessively worn.
10. Measure the diameter of each camshaft journal.
11. Zero the gauge to the journal diameter.
12. Clean the camshaft bearing surfaces in the cylinder head. Measure the inside diameter of each camshaft bearing surface, and check for an out-of-round condition. If the camshaft-to-holder clearance is within the service limit, go to step 13 . If the camshaft-to-holder clearance is beyond the service limit and the camshaft has been replaced, replace the cylinder head. If the camshaft-to-holder clearance is beyond the service limit and the camshaft has not been replaced, go to step 12 . Camshaft-to-Holder Oil Clearance Standard (New): 0.050-0.089 mm (0.0020-0.0035 in) Service Limit: 0.15 mm (0.006 in)
13. Check the total runout with the camshaft supported on V-blocks. If the total runout of the camshaft is within the service limit, replace the cylinder head. If the total runout is beyond the service limit, replace the camshaft and recheck the oil clearance. If the oil clearance is still out of tolerance, replace the cylinder head. Camshaft Total Runout Standard (New): 0.03 mm (0.0012 in) max. Service Limit: 0.04 mm (0.0016 in)
14. Measure the cam lobe height. NOTE: When measuring the No. 1, No. 2, No. 3, and No. 4 cylinders intake cam lobe height of the camshaft, measure the secondary cam lobes. When measuring the No. 1, No. 2, No. 3, and No. 4 cylinders exhaust cam lobe height of the camshaft, measure the primary cam lobes. Cam Lobe Height Standard (New) No. 1, No. 2, No. 3 and No. 4 CYLINDERS: Intake: 35.162 mm (1.3843 in) Exhaust: 36.537 mm (1.4385 in) No. 5, and No. 6 CYLINDERS: Intake: 35.155 mm (1.3841 in) Exhaust: 36.512 mm (1.4375 in) No. 1, No. 2, and No. 3 CYLINDERS No. 4 CYLINDER No. 5 and No. 6 CYLINDERS