bleeding disc/drum brakes with prop/metering valves

[high perf mopar]

hello,,any input on bleeding a 1971 disc/drum brake setup all new with the factory replacement prop valve with metering block??the 71 shop manual says to hold open the metering valve but nothing about the prop valve,,,drawed the fluid thru the system with a mity vac vacuum bleeder hand pump and then tried to final bleed with brake pedal pump manual bleed..brakes wont work or pump fluid out when wheel cylinder valve open????ive blead brakes on my last 4 cars with no problems but this time,,,theres a problem.it has power brakes with a recondiontioned power brake booster.its a bear to depress the brake pedal.primed the master until there was no air,,tightened the master lines after fluid came out...

the prop valve has a plug nut on the bottom where as the metering valve has a relief stud hanging down...will power bleeding be only recourse or what????alll factory replacement setup..prop valve/metering valve??any thoughts????thanks tony.

[Chryco Psycho]

I just bleed the master & go the the furthest wheel & start bleeding out the air at each corner

[BIGSHCLUNK]

I just bleed the master & go the the furthest wheel & start bleeding out the air at each corner

... aint no thang...

[high perf mopar]

well thats not how its working today,,,thanks for the replys,,,,s.o.p as far as im concerned...the motors not running yet...so no vacuum,,,,r u guys saying this with the motor running????because u know what a bear it is to pump power brakes with the motor dead???the onle thing i can think of at this point is the 2 valves r not bleeding correctly,,,,by this method...

[BIGSHCLUNK]

Dont have to be running... sounds like your experieced in bleeding (I find lots of guys that "think" they are). Start in the right rear and just work it!. Maybe keep the valve out of the booster??

[high perf mopar]

thanks,,,,but the real question is the 2 valves,,,,,,,,,1---prop,,,,,2----metering valve,,,,?2 valves on the same system?o.e.m.?i bleed fluid from all 4 corners,,,not a lot but some,,more than others and the rears wont work....its prob me but all things point to a locked system at all these vavles,,,,now how to release them,,,rumor has it they open at 35ft,lbs,,,but will close again,,,,what about opening the prop vavle at the plug????im reaching...................

[BIGSHCLUNK]

hmmm ... sure your masters ok?

[high perf mopar]

now when u guys pumped your brakes for bleeding was it hard as heck to get pedal response with power brake booster to do this?//

[high perf mopar]

hmmm ... sure your masters ok?


yes,,,bench bleed brand new along with the booster....

[high perf mopar]

it just doesnt seem right,,,but all these inline valves r new to me....a local mechanic says to start it at this point with engine vacuum and go from there but thats not how i have done things in the past...

[ShelbyDogg]

Sounds like your system is plugged up.  Pumping power brakes without the engine running to bleed them, is just as easy as manual brakes.  I think that one of those valves are defective and plugged up.

[MEK-Dangerfield]

Sounds like your system is plugged up.  Pumping power brakes without the engine running to bleed them, is just as easy as manual brakes.  I think that one of those valves are defective and plugged up.

   

You have a restriction somewhere. Once you open up any of your brake bleeders, the pedal will go to the floor easily.

[72cudamaan]

   

You have a restriction somewhere. Once you open up any of your brake bleeders, the pedal will go to the floor easily.

[high perf mopar]

thanks for the response guys,,,after calling inline tube today to ask them whats wrong with there parts,,they told me its the low pressure brake warning switch!its designed to close off the rear lines when theres no fluid to operate the fronts. the fix is to open both front caliper bleeds and to run a hose from them to a jar.
and then apply the brake pedal to force the air bubbles out,,i had to close the driver side and do the passenger front by itself to bleed that side.without opening and closeing the bleeds at first..
it seems to work..after messing with it briefly after work today the front brakes now will apply,,,in the next few days i will do the same to the rears...apparently my mity-vac has seen better days. 

[high perf mopar]

You have a restriction somewhere. Once you open up any of your brake bleeders, the pedal will go to the floor easily.

yep,,the safety valve kep shutting off the flow to the rear,opened the fronts to allow air into them and used a branik g300 pressure bleeder to bleed the system..finally the rears flowed fluid.no more bubbles..bleed the front..no more fooling around with it until its running.target start up is memorial day weekend..we will see.tony