Can't do this on a 69. As described in my previous post, the prop valve has no
idiot light connection in 69 or 70.
Trooper
----- Original Message -----
From: Leo John Costigan
To: The Chevelle Mailing List
Sent: Saturday, April 21, 2007 11:27 AM
Subject: Re: [Chevelle-list] Help bleeding brakes
Mike, On the prop valve the idiot wire plug-in (currently not utilized) turns
on the brake light on the dash to tell you that you have a problem with the
brake system. A valve underneath the plug will slide in the direction where the
pressure is the lowest, a leak either in the front or rear line section. When
that valve moves it will block any more fluid going to the leaking or
low-pressure side of the prop valve. You need to return the valve underneath
the plug back to the center so that fluid will flow to the front and rear
brakes.
What you have sounds like the valve has closed off the rear brakes. Fluid
will go the front but not the rear. The Prop valve will provide a ground for
the light. You can connect a test light to the plug. If the valve has moved to
close off a section of the brake lines the light will light. With the test
light connected the plug open a front line and slowly apply pressure at the
brake pedal and watch the light. If it flickers and stays on the valve has slid
to the opposite side. You should be able to bleed the rears now but not the
front. What you want is to have the test light out. You may have to open the
rear line and repeat the apply brake pedal slowly while watching the light
until it stay out.
At some point in time the brake pedal was applied with a leak or open line to
the rear brakes and the prop valve closed off the rear brakes. When the prop
valve closes off either side it is for safety and you will have at least half
of the braking system to stop the vehicle.
Try the test light to see if the prop valve has slid to either side.
Leo
----- Original Message -----
From: Michael Pell
To: The Chevelle Mailing List
Sent: Friday, April 20, 2007 8:04 PM
Subject: Re: [Chevelle-list] Help bleeding brakes
The Prop valve is from a '69, I think. No such pin as you mention. 2
inputs, 3 outputs, 1 idiot wire plug-in (currently not utilized).
I took the 1st MC back, and got another just like it. It seems to be
working better.
I finally got the fronts to bleed!!! And the front wheels are done. This
has not been fun.
Now the rears won't bleed at all, haven't moved an ounce from the resevoir.
I can see bubbles move forward/back as the pedal is pumped (1 man bleed kit),
so I know that the lines are clear and not kinked. At least some air is
getting moved at the rear wheel cylinder as the pedal is pumped.
I did bench bleed the MC, that went fine.
I'm going to let it sitt over night hoping to let the gravity do it's thing.
I don't think I've ever had this much trouble bleeding brakes!!
Thanks for the suggestions.
Mike
--
I would rather live my life as if there is a God, and die to find out there
isn't, Than live my
life as if there isn't, And die to find out there is. -Blaise Pascal
Check out my webpage at http://www.ProStreetCar.com
TREMEC Distributor at http://www.5speedTransmissions.com
Team Chevelle member #1778 (Gold), ACES member #1377
Hoosier State Chevelle Assoc (http://www.IndianaChevelles.com) #6
Rick Schaefer wrote:
Mike
What year? And where can you not get fluid? Front/rear/both?
For 72 anyway, there is a pin on the proportioning valve that must be
pressed in to get flow to the rear.
On 4/20/07, Michael Pell <[EMAIL PROTECTED]> wrote:
Thanks, but what do you mean by 'off center"?
--
I would rather live my life as if there is a God, and die to find out
there isn't, Than live my
life as if there isn't, And die to find out there is. -Blaise Pascal
Check out my webpage at http://www.ProStreetCar.com
TREMEC Distributor at http://www.5speedTransmissions.com
Team Chevelle member #1778 (Gold), ACES member #1377
Hoosier State Chevelle Assoc (http://www.IndianaChevelles.com) #6
Mark Tibbits wrote:
> What brake lines did you replace? The por. valve might be off centered
> is the brake light on? You might have to have to press. bleed the
> system.If you are bleeding the fronts you might have to bleed the
rear
> first. Some times if the por. valve is off center you can drive the
> car as long as you have some brake pedal and then try again. If the
> brake light is on the por, vale is off center.
> ----- Original Message ----- From: "Michael Pell"
> <[EMAIL PROTECTED]>
> To: "ChevelleList" <chevelle-list@chevelles.net>
> Sent: Thursday, April 19, 2007 7:59 PM
> Subject: [Chevelle-list] Help bleeding brakes
>
>
>> I replaced the MC and and brake lines, and can't get any fluid to
>> flow through the lines.
>> I did successfully bleed the MC seperately, so I know that part is
>> working.
>>
>> I even , gulp, read the directions. Open the bleeder open on the
>> brake pedal downstroke, close it before brake pedal gets to the
bottom.
>> I can hear and see the air moving a bit in the clear hose from the
>> bleeder to the cup .
>>
>> Any tips on how to get the fluid down the lines?
>> Thanks,
>> Mike
>>
>> --
>> --
>> I would rather live my life as if there is a God, and die to find
>> out there isn't, Than live my
>> life as if there isn't, And die to find out there is. -Blaise Pascal
>> Check out my webpage at http://www.ProStreetCar.com
>> TREMEC Distributor at http://www.5speedTransmissions.com
>> Team Chevelle member #1778 (Gold), ACES member #1377
>> Hoosier State Chevelle Assoc ( http://www.IndianaChevelles.com) #6
>>
>>
>>
>
>
>
>
>
--
Rick Schaefer
72 TPI El Camino
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