Engine
Timing Belt Replacement Procedures
An excellent, detailed, step-by-step procedure for replacing the timing belt on an '87S4 can be found on John Pritle's web site at
http://members.rennlist.com/pirtle/tbelt.html
John Krawczyk's web site shows how to do a t-belt change on a 16-valve engine:
http://members.rennlist.com/blueshark/page14.html