Brake Issue

[John Turney]

...
Is that a mistake? I will order the flat o-rings just in case someone convinces me there is a good reason to separate the havles of the calipers.
Give me your opinion.

Since all looks good, I would just replace the piston and dust seals and put them back on.

Oh, and a little blue Locktite on those bolts that backed out.

 

[Bob_Spidell]

Lock tabs are overrated and, these days, harder to find anyway. I've had good luck with split lockwashers and blue threadlocker; I've used them in sensitive applications like driveshaft flange bolts and never had a failure. If you want to go the full monty, safety wiring is probably the best (and it's how the FAA insists airplanes be held together; secret: always pull down in the tighten direction, and always turn the sharp end down and away, lest it snag the next interloper, like you). One can of SS wire--and what are now cheap safety wiring pliers from Harbor Freight--plus a jig if you need to drill your own--I never have--is all you need. Plus, pretty much all bolts needed for a later Big Healey in 'AN'--aircraft--grade are available and what you need for when your Healey gets airborn:

https://www.aircraftspruce.com/menus/ha/bolts.html

Safety wiring is fun and anybody can do it with practice. Here's the jist:



I just did my BJ8's gearbox and it might pass FAA muster:



Last time I did my BJ8's calipers/pistons I didn't split the calibers. It's been over 100K miles with no issue.

 

[bob hughes]

Not to my knowledge, anti squeal strips or equivalent products should take care of that

I always use a drop of copper slip between the back of the piston and the anti squeal shims, never had a problem. Not sure that there would be if I left it out?

I'm with John Turney, but since you have removed some of the pistons be very careful putting them back, you do not want to pinch the rubber piston seal. I had trouble with one of my callipers leaking fluid and when I split it and removed the pistons there was a little crescent of rubber present in the bottom of one of the bores and a corresponding nick out of the seal. This can only happen on assembly. When I rebuilt the calliper I used red rubber grease to lube things up and gently twisted the piston to engage the seal before pressing it home.



Bob