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Old 11-12-2018, 11:00 PM
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all new disc brake kit... and drag problem

hello
i got a kit to swap the brake for a 1962 belair station wagon, kit include everything , mc , booster , line , calipers ,rotor , hoses , brakets ect...
new fluid all around
rear drum everything has been redone as well


impossible get an hard firm pedal and without the wheel on , when i try to spin the rotor by hand ,its very difficult to get it to turn and then it drag
without the caliper both rotors spin very well
.driver side is the one that drag the most , passanger side drag only on half of the rotor always at the same spot !!!????
when I unbolt the MC and move it back from the booster , calipers still drag , nothing change

when i "clamp" the front rubber hose i get an hard firm pedal

i also have the little bleed tool in place in the proportinal valve to prevent to trigger the valve

ive been going crazy..... any idee?

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Old 11-14-2018, 01:04 PM
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New rotors and pads need to be bedded in and they will drag initially. This should go away after the bedding in procedure.

Do you have the calipers on the correct sides? if your bleeders are on the bottom you need to switch them (I have seen this more than once).

What kind of bleed are you doing? Pressure, vacuum or old fashioned pump and squirt?

Good luck!
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Old 11-14-2018, 01:17 PM
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Sounds like you have something crooked somewhere if the one disc is catching in the same spot each time. Besides what was already mentioned, was this a well known kit maker or something off of eBay? The reason I ask is a lot of the stuff on ebay will have inferior parts and or incorrect parts for the application. In fact sometimes they list something fitting a particular vehicle that wouldn't fit unless you re-engineered the vehicle. These people that post these "drop-ship" items aren't car people, their just listing stuff and hoping to make a percentage on the sale.


And as far as the pedal situation, make sure you're starting with the right rear, then left rear, right front and then left front after you have bench-bled the master cylinder which is always the first thing you have to do. Whether it is connected to the power assist unit or not is of no matter as long as the master cylinder is receiving the correct amount of stroke to operate it from the brake pedal.
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Old 11-14-2018, 10:48 PM
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thanks guy for all your answers
to respond to all questions

yes calipers on good side with bleeders on top

about the bleeding processus . i did the old technic 2 person...my girlfreind got tired of pressing the pedal looool then i did vacuum ( i dont like it so much ) then i endup doing the pressure one . and banging as well with a rubber hammer on calipers

and yes i started bleeding with right rear sidethen left rear side ect ect

i bled the MC many times on the bench...
and i adjsuted the pedal and as well the rod going from booster to MC

again when i clamp the front brake hoses i got an hard pedal

about the kit yes its a kit from an ebay seller . this kit has good review with pictures as well . the seller also has great review and been selling on ebay since a very long time and i think he sell only brake kits
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Old 11-15-2018, 09:30 AM
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What happens if you release the bleeder on the front? Does the caliper free up?

Have you used 100psi of air to cycle the calipers and make sure they ride the spindle properly?
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Old 11-15-2018, 03:41 PM
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And - can you describe your method of bleeding the MC please?


Also when you have pinched the rubber hose - is it just one side?
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Old 11-15-2018, 09:08 PM
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what do you mean by :100psi of air to cycle the calipers and make sure they ride the spindle properly
i dont nderstand ?
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Old 11-15-2018, 09:15 PM
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the way I bleed the MC was with a seringe ,the big one made for it

and when i pinched the hoses at first it was both front at the same time
then one at a time
and i fund out recently ( yesterday ),that the right one is the one . i pinched the right one and get a really hard pedal
ive been bleeding that one so much !!!!!!!even out of his braket nipple straight up into the air

i think the left one is ok. when i pinch it I still have the soft pedal
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