HELP Disc Brake Conversion Help Please

[64nailhead]

I see what you are saying Dave. Put in the Express van master cylinder, but put the caprice reservoir on top so that it is angled.

Jim, do you have a part number for that Riviera master. Does that have a 1 1/8' bore as well? I looked at RockAuto, and the ones I saw have a 24 mm bore. What makes them work better?

Streetbu, bleeders are on top. I even unbolted the caliper to make sure that the bleeder was at the very top when I bled them.

Master cylinder for Blazer brake upgrade with C5 fronts and (stock drum rears) 12/18-upgrade to rear disc

When I spec'd out my brakes I talked to wilwoods tech department a bit and even with the 6 piston fronts and LS Fbody rears they recommend a 1"MC with the 8" dual diaphragm booster. I was looking for a bit more travel for modulating with the pedal. The LS Fbody rears fit inside my 15" rims. No...

gbodyforum.com

See post #32 for the part numbers. Read the rest for the issues I had and resolved.

 

[malibudave]

If you go 1.0" bore, do the right hand drive 2000 S10 master cylinder.

NEW MASTER CYLINDER OPTION

This master bolts right in no mods and actually works AC DELCO Master Cylinder Part # 89056529 or 18M974 (same master)

maliburacing.com

It's aluminum and newer. It should bolt onto your stock booster.

 

[69hurstolds]

If you go 1.0" bore, do the right hand drive 2000 S10 master cylinder.

NEW MASTER CYLINDER OPTION

This master bolts right in no mods and actually works AC DELCO Master Cylinder Part # 89056529 or 18M974 (same master)

maliburacing.com

It's aluminum and newer. It should bolt onto your stock booster.

Good luck finding that particular part number. I don't know what it cross-references to, but that's a discontinued part with no supersessions in the GMSPO. Many places that still advertise it have 0 in stock.

O'reilly Auto Parts says they have a rebuilt cast iron RH drive unit for a 2000 S-10 under p/n 10-90572 but it comes without a reservoir.

 

[fleming442]

Those Seville calipers are a b*tch to bleed.....

 

[Rgpmalibu]

Jim, after looking at RockAuto I saw that the Riviera has two different masters, one for rear drum and one for rear disc. The rear disc version reservoir is huge - I get it now! The price is a little more reasonable than the Express van's master, plus I won't have to pay another $20 for a new reservoir for that model. Again, I would like to thank everyone for all of the great information to be found here.

 

[L92 OLDS]

Lastly, the proportioning vave swap was almost definitely unneeded. When I changed from the stock prop valve to an aftermarket disc/disc valve it had almost no effect on braking.

God luck - Jim

That’s interesting. When I put rear discs on my car they locked up prematurely and it was dangerous to drive under hard braking. I installed the El Dorado proportioning valve which fixed it.

 

[malibudave]

Here is another part number for the right hand drive S10 with a 1.0" bore master cylinder.

RAYBESTOS MC390572

 

[Rgpmalibu]

I like the S10 MC with the screw on cap, and summit has them in stock by the way, but I already have the plate for the Motive Power bleeder that works with the flat cap style master. I wouldn't be able to bleed the brakes without another adapter. I'm starting to feel a little bad about the amount of money I'm throwing at this thing, and it still isn't drivable yet. Getting the brakes right on this this is a bigger pain than the front coil springs. I just ordered the Riviera master from RockAuto. I hope this gets the job done, or I might find myself in divorce court. Although I'm sure my wife would rather go for a fast ride in a car with functioning brakes!

 

[69hurstolds]

I like the S10 MC with the screw on cap, and summit has them in stock by the way, but I already have the plate for the Motive Power bleeder that works with the flat cap style master. I wouldn't be able to bleed the brakes without another adapter. I'm starting to feel a little bad about the amount of money I'm throwing at this thing, and it still isn't drivable yet. Getting the brakes right on this this is a bigger pain than the front coil springs. I just ordered the Riviera master from RockAuto. I hope this gets the job done, or I might find myself in divorce court. Although I'm sure my wife would rather go for a fast ride in a car with functioning brakes!

If you're talking about the RH drive S10 MC, you would be incorrect. Summit shows "not available". Like everyone else does. Even ACDelco website shows what it is and application, but no place to get it.

Now, they may have a LH drive one that would work, but you'd have to redo your brake lines to your combination valve since they'd be facing the inboard side.

They DO list them as being, or had been, available by the 6 pack as well (bulk) but I cannot locate a part number for that.

 

[Rgpmalibu]

Yeah, I see that now. I definitely don't want to do that. It looks like there is one on amazon and ebay that are RH drive, but I went with the RIV master.