swapped the 11 inch discs in and now brakes are FIXED
#1733298
01/18/15 07:33 PM
01/18/15 07:33 PM
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Joined: Feb 2003
Posts: 8,761
Andrewh
OP
master
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OP
master
Joined: Feb 2003
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UPDATE: So Feets talked me down and into the 1 inch master. this got me into researching chevy master cylinders. Apparently they wire them backwards, so my brakes have been wrong this whole time.
I put the lines in like you would a mopar. Rear port to the front brakes but they do front to front.
I found they made a 1 inch for manual brakes and managed to find one in garland. BUT apparently the aftermarket master I have only used 3/8th ports for the front and back. The factory used 1/2 inch for the front and 9/16th for the rear. I spent all day searching for an adapter. All the parts stores adapter bins are either empty, misfiled, or just full of junk parts people tossed in them. No inventory control on them at all.
However my luck held out today on so many things, wrecks, speed traps, etc.. that at 8, one of the o'riely's happened to have the adapters I needed.
I just finished putting it back together and I can lock up the brakes if I stand on it. but otherwise normal braking.
so 2 different things using an aftermarket manual to power conversion. wrong master cylinder size and front port to front brakes makes a huge difference.
I still think I can bolt up a 95 intrepid booster and master to the brackets I have, but as long as this booster holds up I will let it go. I might hunt one down next time I go to the yards, or have feets see if he can find one next time he is in the yards. but it works now.
******************************************************************** I had the 10 inch discs from an m-body on the 65 coronet. feets gave me a set of the 11 inch caliper adapters and I stole the 11 inch discs from him when he sold the hot rod. so those rotors have been sitting bare on a shelf for several years and at least 6 months or so on my garage floor.
I got a chance today to swap them out. didn't open anything up, just popped the calipers off, swapped the adapters and rotors and then put it back together.
pumped it up till I got a firm pedal again. (had to push a piston back in) and then tried to pull it out of the garage. had my foot in it standing on the pedal and it wouldn't stop under power. when I put it in neutral it stopped.
I got it on level ground and it won't stop in drive. It will hold in reverse, unless I am on an incline. and of course it stops when I am in neutral.
I tried to drive it with the brakes on a bit, back and forth and it might have helped a little, but hard to tell.
did I miss something? glazed rotors?
I was very careful not to get grease on anything. I changed gloves and everything between setting the bearings in and mounting the rotor. But I will probably spray it down with brake cleaner later just in case.
Last edited by Andrewh; 01/25/15 02:25 AM.
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Re: swapped the 11 inch discs in and now brakes are worse.
[Re: Andrewh]
#1733300
01/18/15 07:56 PM
01/18/15 07:56 PM
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Joined: Sep 2010
Posts: 40 Santa Cruz, Ca
4woody
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Posts: 40
Santa Cruz, Ca
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Quote:
" didn't open anything up, just popped the calipers off, swapped the adapters and rotors and then put it back together.
pumped it up till I got a firm pedal again."
If you opened the system you got air in it (hence the pump up).
Bleed it and go from there.
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Re: swapped the 11 inch discs in and now brakes are worse.
[Re: Andrewh]
#1733301
01/18/15 07:57 PM
01/18/15 07:57 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Posts: 36,041
Lincoln Nebraska
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Maybe Feets sprayed the rotors with something to keep em from rusting (I've done that). I'd jack the front wheels off the ground & pull the tires/wheels and have a helper work the pedal as you visual both front corners for anything that dont look kosher. Then I'd replace the wheels and spin em (forward) by hand as the helper works the pedal & see what you discover
live every 24 hour block of time like it's your last day on earth
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Re: swapped the 11 inch discs in and now brakes are worse.
[Re: 4woody]
#1733303
01/18/15 08:26 PM
01/18/15 08:26 PM
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Joined: Apr 2010
Posts: 4,154 bethlehem pa
mikemee1331
master
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master
Joined: Apr 2010
Posts: 4,154
bethlehem pa
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Quote:
Quote:
" didn't open anything up, just popped the calipers off, swapped the adapters and rotors and then put it back together.
pumped it up till I got a firm pedal again."
If you opened the system you got air in it (hence the pump up).
Bleed it and go from there.
ya gotta do a little more than just pump up the peddle when you crack open the lines
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Re: swapped the 11 inch discs in and now brakes are worse.
[Re: Andrewh]
#1733304
01/18/15 08:31 PM
01/18/15 08:31 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Quote:
didn't open anything up, just popped the calipers off, swapped the adapters and rotors and then put it back together.
I didn't think he cracked anything open. EDIT I'd get a rebuilt caliper (they're cheap) & install/bleed it & see if it makes a difference & if so then another one for the other side. Other than that I would bleed the MC/fronts if there is any chance air is in there tho from the descrip there shouldn't be and I'd still do the visual
Last edited by RapidRobert; 01/18/15 08:37 PM.
live every 24 hour block of time like it's your last day on earth
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Re: swapped the 11 inch discs in and now brakes are worse.
[Re: rustbuckett68]
#1733308
01/18/15 10:25 PM
01/18/15 10:25 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Almost wonder if a caliper is hanging up?
Not sure if you have pin or slider type. But assume slider since that is what an M body would have. The slider type has been known to wear on the adapter and cause a hang up, how did the slider ways look?
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: swapped the 11 inch discs in and now brakes are worse.
[Re: Andrewh]
#1733311
01/19/15 12:31 AM
01/19/15 12:31 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
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Posts: 36,041
Lincoln Nebraska
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(1) no air (2) only the L/R front corner assys were changed. (3) same pads (4) I'd brake kleen the pads/calipers (5 grab helper for the pedal (6) visual as he works the pedal (7) compare the old rotor(s) finish to the new rotor(s) finish (tho I dont think that if they are clean) (8) all that is left is a caliper piston travel problem from the retraction (mighta messed up the square seals) but both (L/R corners) appear to be fubared as it ain't pulling to one particular side. unless the retracting messed up both of em. Andrew holler how it turns out
live every 24 hour block of time like it's your last day on earth
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Re: swapped the 11 inch discs in and now brakes are worse.
[Re: Andrewh]
#1733313
01/19/15 03:01 PM
01/19/15 03:01 PM
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Joined: Feb 2003
Posts: 8,761
Andrewh
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Posts: 8,761
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took both sides apart. cleaned them again, took off some of the pad so it was "flat" again, incase it has molded to the old rotors.
with the pads off, and the sliders tighted down, I verfied I could move the calipers without any binding.
They are better, but about the same as the old set.
I think I have some other issue. If a master can give partial braking without moving further, or it could just be as simple as a bad booster again.
I cannot push hard enough to lock up the brakes, or get it to grab harder. I literally was standing with both feet on the pedal and the car was still moving. I think this is unrelated to the new rotor swap, as it did this before and I thought this might sort it out. but it didn't.
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Re: swapped the 11 inch discs in and now brakes are worse.
[Re: Challenger 1]
#1733315
01/19/15 03:21 PM
01/19/15 03:21 PM
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Joined: Jan 2003
Posts: 13,690 md
mopars4ever
I Live Here
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I Live Here
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md
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