Acura TSX / Honda Accord CL. Manual - part 416

14. Adjust the valve clearance (see VALVE CLEARANCE ADJUSTMENT ).  

VALVE CLEARANCE ADJUSTMENT 

Special Tools Required: Tappet adjust wrench set 07MAA-PR70100 

1. Remove the cylinder head cover (see CYLINDER HEAD COVER REMOVAL ).  

2. Set the No. 1 piston at top dead center (TDC). The punch mark (A) on the variable valve timing control 

(VTC) actuator and the punch mark (B) on the exhaust camshaft sprocket should be at the top. Align the 
TDC marks (C) on the VTC actuator and exhaust camshaft sprocket. 

Fig. 57: Aligning The TDC Marks On The VTC Actuator & Exhaust Camshaft Sprocket 

3. Select the correct thickness feeler gauge for the valves you're going to check. 

Intake: 0.21-0.25 mm (0.008-0.010 in.) 

NOTE:

Adjust the valves only when the cylinder head temperature is less than 100°F 
(38°C).

 

2004 Acura TSX 

2004 ENGINES 2.4L DOHC VTEC - TSX

  

 

Exhaust: 0.25-0.29 mm (0.010-0.011 in.) 

Fig. 58: Locating Adjusting Screws 

4. Insert the feeler gauge (A) between the adjusting screw (B) and the end of the valve stem, and slide it 

back and forth; you should feel a slight amount of drag. 

 

2004 Acura TSX 

2004 ENGINES 2.4L DOHC VTEC - TSX

  

 

Fig. 59: Inserting The Feeler Gauge 

5. If you feel too much or too little drag, loosen the locknut with the special tools, and turn the adjusting 

screw until the drag on the feeler gauge is correct. 

 

2004 Acura TSX 

2004 ENGINES 2.4L DOHC VTEC - TSX

  

 

Fig. 60: Turning The Adjusting Screw 

6. Tighten the locknut to 20 N.m (2.0 kgf.m, 14 lbf.ft), and recheck the clearance. Repeat the adjustment if 

necessary.  

7. Rotate the crankshaft 180° clockwise (camshaft pulley turns 90°). 

 

2004 Acura TSX 

2004 ENGINES 2.4L DOHC VTEC - TSX