superdave269

I woke up early to change my master cylinder. After bench bleeding it and starting to install it I noticed it's a little different than the one I removed. I actually looked over the fittings before I started but overlooked this port. I have no ide what the port is for or if it's truly necessary. The look of it reminds me of the old anti-freeze over flow bottle.
Do I need to try and return it ( it's full of brake fluid) or can I plug the line line and be on my way? Does the line go to a sensor? I am pointing to it in my pic. Thanks!

superdave269

Could it be the Vaper pipe? If so is it needed?

pedricd

It attaches to the abs prime pipe and is absolutely needed. You will either need to purchase a master cylinder with the correct reservoir or swap the old reservoir to the new master.

I would definitely recommend bench bleeding too. EDIT: sounds like you did that!

superdave269

Thanks pedricd. I kinda figured it was needed. I guess I will bring it back and see if they will order another one for me. Thanks again!

superdave269

I swapped reservoirs. Quickest fix I could come up with. Napa tried but could only find similar ones and not the one with the port that is required. I already missed my window of cool temperature to work in. It's hot and humid already. Long day ahead..