1985 avanti Master Cylinder

[Brooks Barnes]

where does the connection on the bottom of the master cylinder go to? Brooks

[Zedman]

Hi Brooks.  If you have a Disc Drum system on your Avanti, you probably  (read, ought to !) have a proportioning valve on it.  I had a Kelsey Hayes valve on the inner Left hand Frame Rail down below the Mastetr Cyl location. I have replaced it with a GM PV2 Combination valve which has the same port configuration of the old KH unit and even bolts up exactly the same.  I believe the bottom port of the Master Cyl will be for the Front Disc system. This line will go to the Combination valve as indicated in the screen shot posted- i.e. top, next to Brake sensor, at the end closest to the little rubber plunger cover.  A shot of my Master cyl is also shown for your comparison.  If you need further clarification please do ask.

 

Edited June 22 by Zedman