328 Brake bleeding question

Clogged bleeder?

 

Yes, I'd pull it completely (prepare for fluid leaks) and see if it's internally rusted/corroded - or, if there's debris in there blocking it. If it is, new ones are very inexpesive and I'd replace the other 3 as well.

 

If its an ABS model, then its worth bleeding the brakes with ignition on (so ABS pump is on)

 

You probably have debris stuck in bleed screw. Fill reservoir to max, get stiff wire smaller than fits in bleeder hole you can access while on the car, put pan under caliper, take bleeder fully off car run wire into caliper while fluid leaks out into pan pretty slowly, poke bleeder with wire from outside to inside and inside to outside of bleeder, then put bleeder back in caliper and it should now bleed properly. Do this is a timely fashion so the fluid does not continue to bleed out the open caliper. An option is to plug the caliper exit with a rubber plug. Option is to poke out bleeder debris followed by compressed air.

 

There's enough debris in there to clog the bleeder, I'd do a full brake system flush.

 

If its an ABS car then you use the ABS pump to do the rears. Ignition on, open the bleed nipple, pedal about half depressed & the pump should do the rest. You can do it in your own, but better with help.

Use the pressure bleeder for the front but I wouldn't put 10PSI into it. It doesn't need a lot to send fluid through the system.

I had a fluid reservoir on a VW burst at around 10-12 PSI once. The Ferrari reservoir is much thicker plastic - but its also 30 years old now.....