Hello my name is Dave.
The weight shouldn't effect the pedal, I have know quite a few mechanics that have had major issues getting some clutches properly bled. I have a method that is nearly fool proof:
Purchase several feet of 3/16 hose, can be vacuum or washer, either will work fine. Slide one end over the end of the bleeder on the slave cylinder, take the lid off of the master cylinder, make sure it is full (not over full) then stick the other end as far into the fluid as you can. Open the bleeder and have an assistant pump the clutch pedal slowly, making sure to get full travel. While the pedal is being pumped you should see bubbles, when it stops bubbling have them hold the pedal to the floor and close the bleeder. Remove the hose, fill the master if needed (should not require much since you are actually recirculating the fluid). It usually will take a pump or 2 to get a pedal again but this method works very well especially with stubborn systems.
If you still can't get a good pedal then I would suspect you either have a leak or an internally damaged hose, pay attention to your fluid level to see if it goes down.
I hope this helps you resolve your issues, please keep us up to date on your progress and thank you for using 2CarPros!
Sunday, September 20th, 2020 AT 2:20 PM