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Rear Disks now soft pedal**UPDATE(6/7)**... Help!

Thats not straight up. The bleeders needs to be straight up. Try unbolting it and gravity bleeding it with the bleeder pointing up.
I think all 80s P30 Vans were available with rear discs.
 
odin said:
Thats not straight up. The bleeders needs to be straight up. Try unbolting it and gravity bleeding it with the bleeder pointing up.
I think all 80s P30 Vans were available with rear discs.
Click to expand...

Read back a few posts. I allready did.
 
Anything new? I think im just gonna end up getting a residual valve and new Master cylinder and go from there. I hate to throw more money into it all, but the long travel of the pedal till i get anything just doesnt do it for me.
 
mrdrinksalil said:
So did you have to pressure bleed or u just bled with the truck running? I have a compressor, but dont really wanna make pressure bleeder seeing that I have a vacuum bleeder
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I fixed it for you.

I just bled them with the truck running.

I think the pressure bleeder would work better than the vacuum bleeder because it is pushing the air out not trying to pull it out.:dunno: What do you guys think? I have heard about quite a few people using the pressure bleeders and having very good success with them. Good enough that they are done bleeding the whole vehicle in 1 hour.

I was about to give up and try a 4 wheel disc master until I bled it with the truck running. It is very safe to drive on the road now. It wasn't even close to safe when it was like yours is.

The only number I can see on my master cyl. is on the flat that they machined for the front brake tube fitting it is 60132R or maybe the R is an A.

I will take pics of the master cyl. and my caliper angle tomorrow if it isn't raining.

Mike
 
AZ79K5Project said:
I had the same problem with my brakes. The MC went bad when I was bleeding. The only way I was able to eventually bleed them after replacing the MC was making a power bleeder. Using a tank with brake fluid ensures your MC doesn't go dry.

Link: http://coloradok5.com/forums/showpost.php?p=1761867&postcount=16
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I noticed in the pic of your master cylinder you had the 1/4" line on the rear (cab side) of the master and the 3/16" line on the front. You're running the 3/16 line to the front brakes correct?

Do I have my lines to the wrong ports on my master? my 1/4 line is going to the rear brakes and the 3/16 line is to the front brakes.

DSC02252.jpg
 
I just got a BG brake system pressure bleeder. It uses pressure at the master cyl reservoir to bleed the system, you just hook it up and it forces fluid through the master. Then you just go around and crack the bleeders. I am going to try it on the K5 tonight and see how my pedal winds up.
gabe

If it works you are welcome to come by the shop one evening and we can try it on yours.
 
I got no way to get my rig to your shop gabe. Are you using dana 60 front calipers? If you are then I dont understand how you've got acceptable pedal and mine goes to the floor. I've gotta have air in the system or a bad master. I just really dont think there is any air in there cause the calipers shoot good streams of fluid
 
Yep, Dana 60 front and 3/4 fronts on the rear... Where are you in atl? If you have an air compressor I could load up the brake machine and bring it over one night.
gabe
I'll let you know how it turns out after I do mine.
 
Here's the pic of my master cyl. and my caliper bleed screw angle.
You can also see I used teflon tape on the bleed screw so when I was vacuum bleeding it, it didn't suck air around the threads.

Mike

P4030153.JPG

master cylinder.JPG
 
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mrdrinksalil said:
I noticed in the pic of your master cylinder you had the 1/4" line on the rear (cab side) of the master and the 3/16" line on the front. You're running the 3/16 line to the front brakes correct?

Do I have my lines to the wrong ports on my master? my 1/4 line is going to the rear brakes and the 3/16 line is to the front brakes.

DSC02252.jpg
Click to expand...

His and mine are the way they come stock. 1/4" goes to rear brakes and to the front port of the master cyl. 3/16" goes to the front brakes and rear port on master cyl. His front port looks like it has 1/4" brake line to it on my computer. 1/4" is bigger than 3/16". I am not trying to be an a** with that statement.

Mike
 
UPS said:
His and mine are the way they come stock. 1/4" goes to rear brakes and to the front port of the master cyl. 3/16" goes to the front brakes and rear port on master cyl. His front port looks like it has 1/4" brake line to it on my computer. 1/4" is bigger than 3/16". I am not trying to be an a** with that statement.

Mike
Click to expand...

Must just be my eyes playing tricks on me.
 
GEORGIA GABE said:
Yep, Dana 60 front and 3/4 fronts on the rear... Where are you in atl? If you have an air compressor I could load up the brake machine and bring it over one night.
gabe
I'll let you know how it turns out after I do mine.
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Gabe, your voicemail is full AND your CK5 PM box. But I live in Flowery Branch. Its a good ways away from you. I'm not in a big hurry so try it out on your truck and let me know what happens.

UPS- I got some numbers on my master where yours are too and dont know what they mean either. If you got yours working and are using the same master cylinder as me then I must have air in my lines or a bad master. I really dont think the combination valve should have any effect unless its holding off enough pressure to the rear to give you a stiffer pedal. Looks like I really need to pressure bleed.
 
UPS said:
His and mine are the way they come stock. 1/4" goes to rear brakes and to the front port of the master cyl. 3/16" goes to the front brakes and rear port on master cyl. His front port looks like it has 1/4" brake line to it on my computer. 1/4" is bigger than 3/16". I am not trying to be an a** with that statement.

Mike
Click to expand...

Quoting myself.:eek1:
Is that how you have yours?

Mike
 
I made a bleeder out of a mason jar. It has two tubes coming through the lid to attach hoses to. One goes to the bleeder screw (it extends all the way to the bottom of the jar) and the other goes to the intake manifold (tube barely pokes through the lid.)

A 350 cubic inch vacuum pump can really move some fluid.
 
mrdrinksalil said:
The pics of the one with the shinny motor is my truck and his pics are in the link. Was that confusing you?

Yeah, mine is like what you quoted. I thought HIS looked different
Click to expand...

Yes, that was confusing me.:blush:
I guess I need to follow all of the links and read everything, including quotes.

His does have 3/16" to the front port on the master cyl. and 1/4" on the rear port. :dunno:Sorry for the confusion.

Man, your engine compartment is clean!

I'll try and keep up from now on.:D
Mike
 
Just curious if you push the brakes and the pedal goes to the floor and then you push them again does it have a better pedal or does it go to the floor again? When I swapped to disk in the rear on my old 14BFF I would have to push it and then the 2nd time I got a good pedal. It is because the rear requires more fluid with the disk. With the residual valve it will hold just a little bit of pressure on the lines so that you dont have to pump it.
 
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