I've searched alot for clutch adjustment. lot of ppl told me it is hydraulic and can't be adjusted. if ur master cylinder and slave cylinder are ok. all u need to do is follow procedure and ur clutch pedal will be as good as new

 

free play and clutch engagement height are two different things meng

 

if u have a hydraulic clutch u dont adjust it. the older civics i think have cable clutches that u adjust the cable. if yours is hydraulic u can check the pedal itself at the firewall see if its lined up. change the fluid out or bleed the lines if u have a problem. the pedal will adjust itself after a few tries. see that u dont have a leak in the master and slave cylinders. there r pistons in both that move the fluid thru and activate the clutch. the pistons and seals can go bad.