loud squeak when accelerating
 

I replaced all the belts and it still squeaks. The car kinda sounds like a prius or little toy wind-up car. Any ideas? thanks

pulley(s)?

Maybe the waterpump? Or pullies. Alt belt? Re-do the tension on the alt belt.

overtension on timing or BS belt?

If the alt/AC belt is tight to spec and you have used a mechanics stethoscope (carefully) on the PS pump, alt, AC compressor (with AC on) and the WP..........................

It is time to replace all your belt rollers.
I noticed you did the head when you had 2 bent valves. Do you know the age of the rollers on the car or have you replaced the rollers when you did the new belts?

If you do not know the age of the rollers, replace. Even if they look and feel solid when you spin them, if they are the original rollers or a set that is 60K or longer old, you should replace. The old rollers were constructed of weak material that was found to be brittle. The new roller material solved this problem.

If you have an early 944/1 you should also replace the tension roller bolt. Another weak part.

GL
John_AZ
1988 924S + 1987 924S