Manual Brakes (Not feeling so good)

[pontiacgp]

Thanks for the help guys. I think we must just be doing something wrong. We are going to test the pressure at the wheels tonight or tomorrow. Maybe a bad master clylinder, who knows?

pontiacgp- do you have a link or a part number I could look up, again thanks for your help

Sorry, I don't have a part number. I just order a 1984 S10 non power brake wheel cylinder. The difference is the piston in the non power brake set up is 7/8, with the power brakes the piston is 3/4.

 

[1988 Olds]

Yes I understand that non-power is a bigger bore, allowing more fluid through it. My problem is a S-10 wheel cylinder has 3/8-24 threads and from what I can tell my cutlass has Metric M10-1.50 theads. I don't see how that is going to work out. Am I wrong in thinking I have the Metric threads.

 

[pontiacgp]

I have never seen metric brake lines on a G body. Where did you get your info that your brake lines are metric?

 

[85 Cutlass Brougham]

Most cars also list a power and non power master cylinder if it was an option. I would check to see if there is such a dichotomy in masters for the S-10 by using Auto Zone.com and checking part numbers.

 

[Uncletruck]

Some early models of the G body could come factory equipped with manual brakes. Using a '78 Malibu as an example, I looked up master cylinders and they are different between one with manual and power brakes. The cylinder for manual brakes for whatever reason is more than double the price of a power brake cylinder. The manual one is probably a more powerful stand alone cylinder.

-UT-

 

[1988 Olds]

Yea we are sure we have the right master clylinder. We checked the pressure today at the master cylinder and was able to produce 1000-1200 psi without to much problems. At the front wheels my dad measured 1800-2000psi with a little gauge that took the place of the pad.

I am not sure how/where my dad seen that my brakes were metric but I'll have to look into that more. Also we noticed that my brake pads are glazed over and I read that using a more aggresive non-ceramic pad may help alot. Anyone else notice this.

 

[85 Cutlass Brougham]

Ceramic brakes are great when they are warm, but scary when they are cold. Or so goes the theory.

 

[pontiacgp]

Ceramic brakes are great when they are warm, but scary when they are cold. Or so goes the theory.

I had that problem with the ceramic brake pads I tried but I'm using EBC green pads which are a composite material of kevlar and ceramic. Although they are better when hot they're still a great pad cold and it doesn't take much to heat them up. I have crossed drilled and slotted rotors as well so they help with the braking also...

 

[1988 Olds]

Yeah we ordered a set of Hawk Performance Brake Pads which are suppose to come into today so I'll let you guys know how it goes.

I read on raybestos site that the thread for M10-1.50 for a Cutlass Wheel Cylinder. Can't seem to find anywhere where it says they are 3/8-24

 

[pontiacgp]

I read on raybestos site that the thread for M10-1.50 for a Cutlass Wheel Cylinder. Can't seem to find anywhere where it says they are 3/8-24

I've replaced the brake lines on my 86 GP and a few other G bodies and have never used any metric fittings....why not head to your local parts store and ask to see a wheel cylinder for your vehicle and install a 3/8 - 24 fitting to see if it fits...