I’m rebuilding the brake system on my ‘68. Power discs in front. I have all new seals and pistons. After cleaning up the calipers I notice that the area around the outer rubber seal is pretty pitted. The bore and surface around the piston O ring looks fine. My question is whether you think the outer seal will seat ok as is or if I need to replace the caliper. I’ve posted pics of both. The other is in much better condition.
Thanks in advance for any feedback.
Andy McCulla - Portland, OR
If you’re referring to what appears to be pitting on the 90 degree (?) edge of the seal in the top picture only, I would not be worrying about it. It may help if you to some overlays with arrows or something like that to highlight what you’re referring to.
Thanks for your reply and recommendations on the photos. I’ll add some pointer arrows tonight. The edge face I’m concerned about is actually the next one below the top edge. It may not be pitting … maybe just as cast (?) … but the other caliper (second pic) has nice crisp edges and surfaces.
Check back again for updated photos.
Andy
Hope this helps to clarify the area I’m asking about. Thanks !
I wouldn’t considered those to be a problem at all. The piston to hard rubber o-ring is the more critical seal point. The outer seal stops dust and debris. Be sure the bleeder threads and seat are clean.
Thanks, Gaugster … and I appreciate the tip on the threads.
For WIW, when I started the brake job I thought it was going to just be a matter of rebuilding the booster. (Laughing). As I started working my way back from the booster, virtually every component in the system needed attention.
When I got the car, it hadn’t been driven in several years. Previous owner had taken good care of it, but non-use of the brake system proved fatal to proportioning block, soft AND hard lines, calipers and drum cylinders.
I was really surprised when I got to the rear drums and realized that the hard lines were completely blocked.
It ended up being a bigger job than anticipated, but now I’ll be confident knowing that everything is fresh and hopefully trouble free (laughing again) for a few years.
Lesson learned: Check your hard lines when you’re servicing your brakes. It may be the cause of poorly performing brakes !
Andy
PS … many thanks to WCCC and Power Brake Booster Exchange in Lynnwood, WA !
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