Acura TSX / Honda Accord CL. Manual — part 435

6. Inspect the rocker arm pistons (A). Push each piston manually. If it does not move smoothly, replace the

rocker arm set.

Fig. 130: Inspecting The Rocker Arm Pistons

CAMSHAFT INSPECTION

1. Remove the rocker arm assembly (see ROCKER ARM ASSEMBLY REMOVAL ).

2. Put the rocker shaft holders, camshaft, and camshaft holders on the cylinder head, then tighten the bolts in

sequence to the specified torque.

Specified Torque:

8 mm bolts: 22 N.m (2.2 kgf.m, 16 lbf.ft)

6 mm bolts: 12 N.m (1.2 kgf.m, 8.7 lbf.ft)

6 mm bolts: Locations 21, 22, 23

NOTE:

Apply oil to the pistons when reassembling.

NOTE:

Do not rotate the camshaft during inspection.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 131: Camshaft Holder Bolt Torque Tightening Sequence

3. Seat the camshaft by pushing it away from the camshaft pulley end of the cylinder head.

4. Zero the dial indicator against the end of the camshaft, then push the camshaft back and forth and read the

end play, If the end play is beyond the service limit, replace the cylinder head 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: 0.4 mm (0.02 in.)

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 132: Checking Camshaft End Play

5. Unscrew the camshaft holder bolts two turns at a time, in a crisscross pattern. Then remove the camshaft

holders from the cylinder head.

6. Lift the camshafts out of the cylinder head, wipe them clean, then inspect the lift ramps. Replace the

camshaft if any lobes are pitted, scored, or excessively worn.

7. Clean the camshaft journal surfaces in the cylinder head, then set the camshafts back in place. Place a

plastigage strip across each journal.

8. Install the camshaft holders, then tighten the bolts to the specified torque as shown in step 2.

9. Remove the camshaft holders. Measure the widest portion of plastigage on each journal.

Camshaft-To-Holder Oil Clearance:

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Standard (New):

No. 1 Journal: 0.030-0.069 mm (0.001-0.003 in.)

No. 2, 3, 4, 5 Journals: 0.060-0.099 mm (0.002-0.004 in.)

Service Limit: 0.15 mm (0.006 in.)

z

If the camshaft-to-holder clearance is within limits, go to step 11 .

z

If the camshaft-to-holder clearance is beyond the service limit and the camshaft has been
replaced, replace the cylinder head.

z

If the camshaft-to-holder clearance is beyond the service limit and the camshaft has not been
replaced, go to step 10.

Fig. 133: Measuring The Widest Portion Of Plastigage On Each Journal

10. Check the total runout with the camshaft supported on V-blocks.

Camshaft Total Runout:

Standard (New): 0.03 mm (0.001 in.) Max.

Service Limit: 0.04 mm (0.002 in.)

z

If the total runout of the camshaft is within the service limit, replace the cylinder head.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX