Quick (and rather urgent) question on DRM brake bias spring

[Matt B]

I'm just about to bleed my brakes (regular fluid change) and would like to install my DRM bias spring into the master cylinder.

Before I tear everything down - will I have to bench bleed the master cylinder afterwards or will a normal 4 corner bleed get all the air out?

I don't have a bench bleed kit on hand and would make my Z inoperable for an unnecessary time...

[Demps]

Bench bleed is required to ensure bias spring stays centered & keeps brake light off. Easy to do in a vice on an 'ear' of the MC if you can recirculate from output ports back into reservoir.
Ted

[Matt B]

Thanks Ted. So, too much effort for me today. I'll put it back to my shelf and give another next year when next fluid change is due.

P.s. meanwhile I tried to remove the master cylinder but the front brake line nut is stuck. I drenched it in rust solvent. If it opens tomorrow I'll remove the MC and swap the spring. If not... No DRM spring for me.

[Mikey]

Brake clean and dry the fitting before disassembly. Don?t risk contaminating the brake fluid with the penetrating oil you put on the fitting.

[Matt B]

It didn't break loose. I skipped the swap and will retry next time.
Not sure if that spring is worth the effort...