So after some investigating (and finger feeling) it turns out that the clutch fork pivot was causing the squeaks. At this point it wasn't squeaks anymore but metal-to-metal contact throughout the clutch travel, so something had to be done.
First off, I bought a cartridge tube of Philips 66 Multiplex Red #2. You'll only need less than 1% of it. Got it at 22 MYR - about 5 USD at today's rates.
Next was to remove the two 14mm mount bolts holding the slave cylinder to the clutch housing. These two bolts are stuck tight and snapped off my 3/8" to 1/4" adapter off clean. It was basically a job for another day when I unknowingly found another 14mm socket that would go on my 3/8" socket bar. Job goes on!
After the two bolts were out, the slave cylinder was moved away. Pulled off the boot, sprayed WD40 onto a rag and did a wipedown on the rod and fork (I did another pass with another clean rag to wipe off the excess).
Time for the real work. The middle pivot inside the clutch housing is shaped like an omega symbol (Ω) where your finger would be coming from the top. With two fingertip gobs of grease I fingered (?) it into the two sides, pushing in as much grease as I could. The excess was then worked around the ball of the middle pivot. With most lubricants, a little goes a long way.
FYI, you only need less than a quarter of this:
Another fingertip gob to the point where the slave rod meets the fork and you're done. Reinsert back the boot, tighten back the bolts to 37Nm (based on the
slave cylinder swap guide here).
One mistake I made was that I stepped on the clutch after the slave cylinder was dismounted, which extended the rod and would prevent you from remounting the cylinder. I had to use a hand to press the rod against the top pivot, and then insert and finger tighten the bolt with another. Not a major setback but an unneeded one.
Pump the clutch pedal to work the grease in, and drive around for the grease to liquefy and settle in - and you're squeak free for the life of the car, hopefully
Special thanks to @
humfrz and @
Ultramaroon for the instructions, tips and tricks.