Adjusting the valves is an integral maintenance procedure that should be performed on any Honda during a major service interval. A high-performance car like the S2000 most definitely needs to have this service performed on a semi-regular basis.
Without further ado, here is the proper procedure for adjusting the valves on an AP2 S2000. The car that I worked on was a '04, although I'm almost positive that this guide will apply to AP1s as well:
1) Note the radio security code and the radio presets.
2) Remove the cylinder head cover retaining bolts. Remove the cylinder head cover from the engine. (there are many parts diagrams here: S2000 parts diagrams. Simply go to the relevant components category and relevant diagrams will be displayed.)
3) Set the number one piston at TDC. The TDC marks on the cam chain sprocket should align with the cylinder head surface.
4) Using the proper gauge feeler gauge, adjust the valves on cylinder number one.
5) Rotate the crankshaft 180 degrees. Using the proper gauge feeler gauge, adjust the valves on cylinder number three.
6) Rotate the crankshaft 180 degrees. Using the proper gauge feeler gauge, adjust the valves on cylinder number four.
7) Rotate the crankshaft 180 degrees. Using the proper gauge feeler gauge, adjust the valves on cylinder number two.
8) Install the cylinder head cover.
9) As required, on 2001Ė05 vehicles, reprogram the ECM engine idle characteristics. Be sure all electrical items are OFF.
10) Start the engine. Hold the idle speed at 3000 RPMís in neutral until the radiator fan comes on or the temperature reached 176 degrees.
11) Let the engine idle for about five minutes with the throttle fully closed.
12) If the radiator fan comes on during the five minutes, do not count this toward the five minute programming time.
13) Set the clock.
As required, reprogram the power window control unit as follows:
1) Turn the ignition switch ON. Lower the window, all the way down. Open the driverís side door.
2) Turn the ignition switch OFF. Push and hold the drivers window DOWN switch.
3) Turn the ignition switch ON. Release the driverís window DOWN switch. This must be done within five seconds.
4) Repeat the above step three more times. Wait one second.
5) Confirm that the AUTO UP and AUTO DOWN do not work. If they work repeat the procedure, paying close attention to the five second time limit.
6) Move the driverís window all the way down by holding the drivers window DOWN switch to the AUTO DOWN position.
7) Pull up and hold the driverís window UP switch to the AUTO UP position until the window reaches the fully closed position. Hold the switch for one second.
8) Confirm that the power window master switch has been reset by using the driverís window AUTO UP and DOWN function.
9) If the AUTO UP and DOWN feature is still not working, repeat the complete procedure, paying close attention to the five second time limit.
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