My 89 Saab 900 has a dying, 2-year-only, NLA (of course) brake master cylinder. I have a Girling rebuild kit, because parts hoarder.
So:
Pitted Master Cyl + JB Weld
= Dumb?
or
= Resourcefully Economical?
Getting it sleeved would obviously be best, but I'm not keen to do that atm. Or tracking down a used one, except it may also be pitted.
It's only the brakes. What could possibly go wrong?
Dumb.
Yeah it's dumb because of the consequences of the repair failing. If it were a clutch MC it could be worth a try, but with a tandem brake MC any leaks and/or loose chips of JB weld could affect both circuits. Even with race-car-style dual MCs, losing one circuit could be pretty bad.
Okay, so much common sense here.
ANOTHER QUESTION:
From looking at Pegasus Racing's site, I infer that there's a standard range of bores. If I extend that inference to passenger car MCs, then, assuming standard attachment dimensions:
Is there's a big ol' list of master cylinder specs out there?
I know the bore and stroke specs, plus the booster force-multiplier specs. It would make me super happy if, say, there's some domestic MC and booster that's functionally identical and can be easily adapted.
there's some standard bores for performance stuff. When it comes to production cars, there's all kinds of different stuff out there. Some are normal dual circuit, some are stepped bore, some are quick takeup, some with integrated check or bias valves, different numbers and types of fittings, different flanges, etc. I'm sure there's interchangeability, especially within manufacturers, but maybe not as much as what you're hoping for. I've never seen a master list, but I've had good luck trolling through RockAuto using their part detail and interchange info to find stuff that works.
ninja edit - I had apple hydraulics sleeve a master for me several years back, I don't remember it being all that expensive.
I can sleeve master cylinders
Will not hurt to try. Worse can happen is it leaks and you're back to square one. I see no reason for a catastrophic failure.
I have used a two part metal epoxy called Belzona on problems like this with much success. You will probably have to run a hone through it afterwards.
It's not cheap though.
As mentioned above it can be sleeved.
Is it this one;
https://shop.speedparts.se/sv/prod/saab/900-79-93/broms/huvudcylinder/523589_8993589.html
?
Available here in Sweden, not OEM but Speedparts are OK generally.
Looking at the other listings I find it looks like straight 22.2 mm bore tandem cylinder, so could be replaced by most other similar ones that are physically possible to fit.
In reply to therealpinto :
Yes, that's the one! Thank you for for being a Swedish car guy on GRM and seeing this. :)
Because US cars all got ABS in '90, the 88-89 part is scarce. But I'm guessing you could have gotten a 900 without ABS in Europe thru '93, hence Speedparts having it. Only fear is if it's sourced from Pro Parts, which is infamous for E36 M3ty quality.
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