Acura TSX / Honda Accord CL. Manual — part 437

Fig. 139: Installing The Valve Guide Seal Remover

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

5. Remove the valve seal.

Fig. 140: Removing The Valve Seal

VALVE INSPECTION

1. Remove the valves (see VALVE, SPRING & VALVE SEAL REMOVAL ).

2. Measure the valve in these areas.

Intake Valve Dimensions:

A Standard (New): 34.85-35.15 mm (1.372-1.384 in.)

B Standard (New): 108.7-109.5 mm (4.280-4.311 in.)

C Standard (New): 5.475-5.485 mm (0.2156-0.2159 in.)

C Service Limit: 5.445 mm (0.214 in.)

Exhaust Valve Dimensions:

A Standard (New): 29.85-30.15 mm (1.175-1.187 in.)

B Standard (New): 108.3-109.1 mm (4.264-4.295 in.)

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

C Standard (New): 5.450-5.460 mm (0.2146-0.2150 in.)

C Service Limit: 5.42 mm (0.213 in.)

Fig. 141: Measuring The Valves

VALVE STEM-TO-GUIDE CLEARANCE INSPECTION

1. Remove the valves (see VALVE, SPRING & VALVE SEAL REMOVAL ).

2. Slide the valve out of its guide about 10 mm, then measure the guide-to-stem clearance with a dial

indicator while rocking the stem in the direction of normal thrust (wobble method).

Intake Valve Stem-To-Guide Clearance:

Standard (New): 0.06-0.11 mm (0.002-0.004 in.)

Service Limit: 0.16 mm (0.006 in.)

Exhaust Valve Stem-To-Guide Clearance:

Standard (New): 0.11-0.16 mm (0.004-0.006 in.)

Service Limit: 0.22 mm (0.009 in.)

z

If the measurement exceeds the service limit, recheck it using a NEW valve.

z

If the measurement is now within the service limit, reassemble using a NEW valve.

z

If the measurement with a NEW valve still exceeds the service limit, go to step 3.

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX

Fig. 142: Measuring The Guide-To-Stem Clearance

3. Subtract the O.D. of the valve stem, measured with a micrometer, from the I.D. of the valve guide,

measured with an inside micrometer or ball gauge. Take the measurements in three places along the valve
stem and three places inside the valve guide. The difference between the largest guide measurement and
the smallest stem measurement should not exceed the service limit.

Intake Valve Stem-To-Guide Clearance:

Standard (New): 0.030-0.055 mm (0.0012-0.0022 in.)

Service Limit: 0.08 mm (0.003 in.)

Exhaust Valve Stem-To-Guide Clearance

Standard (New): 0.055-0.080 mm (0.0022-0.0031 in.)

Service Limit: 0.11 mm (0.004 in.)

VALVE GUIDE REPLACEMENT

Special Tools Required:

2004 Acura TSX

2004 ENGINES 2.4L DOHC VTEC - TSX