Zr1bandit

Who do you guys recomend for rebuilding original 1970 W-30 power brake master cylinder ?? Thanks——

Zr1bandit

Posted in wrong area——sorry

BackInTheGame

I have not done so myself, but from a number of threads here on C.O. as well as availability of kits, I would think it is very easy to do a rebuild yourself. I plan on doing my own rebuild of a core MC sometime this summer.

Good Luck!

Zr1bandit

i would do myself but it needs to be re sleeved i beleive. Scored prettty good

oldsonharmont

It's a pretty easy job if you have the right tools. You'll need a pair of internal snap ring pliers to remove the piston assembly, and a power drill and a small hone to clean up the bore. Use brake fluid to lubricate the bore during the honing process. You can also soak the cast iron housing in white vinegar overnight to remove any light rust. Rock Auto is closing out rebuild kits for about $10. Don't forget to bench bleed the master cylinder before installing. Give it a try and good luck!

briane

If the bore is damaged, consider sending it to Karp's in California. A restorer recommended them to me. I had a couple master and wheel cylinders done there and the work was excellent.

69HO43

I know everyone would say "rebuild it" but you have to consider what you're end goal is. If you're trying to keep it a numbers matching, restored to original showroom condition car, then yeah, you save what you can. But if your car is a weekend warrior with non-original engine, and numbers matching/concours resto isn't something you're shooting for, it may not be worth it. For the time and effort it will take if you've never done one before far exceeds buying a "stock-looking" replacement. Of course, if you want to give it a whirl, why not? If you can't save it, you'll be getting another one that works from somewhere.

redoldsman

X2 on Karps. They rebuilt the treadlevac for my 54 and it is perfect. Good guy to work with and he has been doing this a long time.

ROCKET VAPOR

White Post has a good reputation for re-sleeving master cylinders as well.
https://whitepost.com/brake-sleeving...ding-services/

Daiv8or

Watching to see which way you'll go with these two vendors. I will be looking for a sleeving/restoration service for my master cylinder too soon.

RocketDevo

I had John Stuart Power brake Ltd in Stoney Creek Ontario rebuild many.
They use Stainless Steel sleeves, not cheap but will last the life of the car.

Yellowstatue

^^^ X2 for John Stuart.

Zr1bandit

Thanks guys for all the sugestions——will pick one and send it off soon—-thanks again

Daiv8or

Please let us know your decision and the ultimate results. I will be doing this soon and the reviews are very helpful!