Acura TSX / Honda Accord CL. Manual — part 439

Fig. 147: Driving The Guide In To The Specified Installed Height

10. Coat both reamer and valve guide with cutting oil.

11. Rotate the reamer clockwise the full length of the valve guide bore.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 148: Reaming The Valve Guide

12. Continue to rotate the reamer clockwise while removing it from the bore.

13. Thoroughly wash the guide in detergent and water to remove any cutting residue.

14. Check the clearances with a valve (see VALVE STEM-TO-GUIDE CLEARANCE INSPECTION ).

Verify that a valve slides in the intake and exhaust valve guides without exerting pressure.

VALVE SEAT RECONDITIONING

1. Inspect valve stem-to-guide clearance (see VALVE STEM-TO-GUIDE CLEARANCE

INSPECTION ). If the valve guides are worn, replace them (see VALVE GUIDE REPLACEMENT )
before cutting the valve seats.

2. Renew the valve seats in the cylinder head using a valve seat cutter.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 149: Using A Valve Seat Cutter

3. Carefully cut a 45° seat, removing only enough material to ensure a smooth and concentric seat.

4. Bevel the upper and lower edges at the angles shown in the illustration. Check the width of the seat and

adjust accordingly.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 150: Beveling The Upper & Lower Edges

5. Make one more very light pass with the 45° cutter to remove any possible burrs caused by the other

cutters.

Valve Seat Width:

Standard (New): 1.25-1.55 mm (0.049-0.061 in.)

Service Limit: 2.00 mm (0.079 in.)

6. After resurfacing the seat, inspect for even valve seating: Apply Prussian Blue compound (A) to the valve

face. Insert the valve in its original location in the head, then lift it and snap it closed against the seat

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX