Acura TSX / Honda Accord CL. Manual — part 440

several times.

Fig. 151: Checking Valve Seating Surface

7. The actual valve seating surface (B), as shown by the blue compound, should be centered on the seat.

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If it is too high (closer to the valve stem), you must make a second cut with the 67.5° cutter to
move it down, then one more cut with the 45° cutter to restore seat width.

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If it is too low (close to the valve edge), you must make a second cut with the 35° cutter (intake
side) or the 30° cutter (exhaust side) to move it up, then make one more cut with the 45° cutter to
restore seat width.

8. Insert the intake and exhaust valves in the head, and measure valve stem installed height (A).

Intake Valve Stem Installed Height:

NOTE:

The final cut should always be made with the 45° cutter.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Standard (New): 44.0-44.6 mm (1.73-1.76 in.)

Exhaust Valve Stem Installed Height:

Standard (New): 44.0-44.6 mm (1.73-1.76 in.)

Fig. 152: Measuring Valve Stem Installed Height

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

9. If valve stem installed height is over the standard, replace the valve and recheck. If it is still over the

standard, replace the cylinder head; the valve seat in the head is too deep.

VALVE, SPRING & VALVE SEAL INSTALLATION

Special Tools Required:

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Stem seal driver 07PAD-0010000

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Valve spring compressor attachment 07757-PJ1010A

1. Coat the valve stems with engine oil. Install the valves in the valve guides.

2. Check that the valves move up and down smoothly.

3. Install the spring seats on the cylinder head.

4. Install the NEW valve seals (A) using the stem seal driver (B).

NOTE:

The exhaust valve seal (C) has a black spring (D), and the intake valve seal
(E) has a white spring (F). They are not interchangeable.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX