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No oil going into rear caliper !?

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Discussion starter · #21 ·
The kit I posted also is a self brake bleeder kit so don't worry about this ;)
I'm more worried about the fact that there's no oil in the lines :rofl:

Pretty much the same thing I should receive in a few minutes ...

http://www.ebay.com/itm/New-2-Jar-H...907320673?pt=Motors_Automotive_Tools&hash=item51b3b4c961&vxp=mtr#ht_2995wt_1433

Product Details:

- Include the parts of brake bleeder, easily bleed brakes by yourself.
- Can be used to bleed hydraulic systems or siphon fluids.
- Checks vacuum/ pressure operated automotive components.
- Brass cylinder and cylinder head.
- Vacuum/ pressure pump and brake bleeding kit.
- Replaceable O-ring cylinder head gasket, rubber piston ring and valves.
- Pressure range: Positive pressure. 0 to 3inHg; Negative pressure: 0 to -1inHg.
- The body was the switch to control two kinds of pressure conditions.
- The pressure gauge is encased in a rugged rubber boot which provides protection for both gauge(to insure accuracy) and vehicle surfaces.


Hoo sorry my friend, didn't knew you already had a kit haha :D

Anyway it's not to bleed caliper that I order this crap, it's only to put vacuum on my brake booster to see if the rod lenght will change. I can't start the car for now so I had to found a way to put vacuum in the booster. I posted a link that explain why maybe 4-5 post ago ...
 
#23 ·
DSM4LIFE-AWD said:
Anyway it's not to bleed caliper that I order this crap, it's only to put vacuum on my brake booster to see if the rod lenght will change. I can't start the car for now so I had to found a way to put vacuum in the booster. I posted a link that explain why maybe 4-5 post ago ...
Click to expand...
I got that, but this way you're going to find out if the brake booster holds vacuum while I am not sure if the vacuum generated that way will allow you to operate the master cylinder effectively as long as needed to diagnose it.

You will have to bleed the brake system eventually since you disconnected the lines at the proportional valve.

Please post your results as it will be interesting to learn about the capabilities of the mighty MV8500 (I confess mine is up there in the attic BNIB along with 99% of my performance parts).
 
Discussion starter · #24 ·
Haha yeah I'll keep you updated :)

What I want to try first is put 18 to 20Hg of vacuum in the booster and push the brake pedal to see if there is oil coming out of both ports on the master. If it doesn't well I'll try to adjust the rod to be sure that it's not pushing on the piston.

Then I'll be done cause it'll be working !
 
Discussion starter · #25 ·
Ok I putted vacuum to the booster and it didn't change anything.

I checked the rod adjustment and it seems in spect. I disconnected my ss line on the prop valve and bench bleed the master in place. Got to love ss line. No change no oil exit the ports for the rear right at the valve. I had both rear hose disconnected and no oil in the port while my friend pump and hold the pedal.

Then I decided to swap the feed line right at the prop valve. Guess what !? No oil for the rear and still build pressure on the front caliper.

Proportional valve is bad !
 
Discussion starter · #26 ·
Got the valve in my hand now, how can I test it ?

It will be hard to say but I'll give a try. On the valve there is 2 feed ports, each feed is for a side of the car. So it's not front and rear but driver or passenger side.

I putted 100psi of aire into each feed and it only comes out from the front caliper ports. Even if I block the front caliper port, nothing wants to exit for the rear. It's doing this on both side ...

Maybe I'm not thinking right but I don't think it's normal. If we can bleed our system with the kit posted in this thread, there's no reason why 100psi wouldn't pass.

That's it for tonight ...
 
Discussion starter · #27 ·
Made an other quick test this morning here at the shop, we hooked some lines to the valve and tryed to suck fluid with my MV8500 from the ports for the rear brakes. Like I tought no oil exit those ports at 30Hg vacuum ... Vacuum stay build, nothing pass in the valve.

That confirm me that the prop. valve is bad. Seems to be stuck because yes there are some kind of check in this. Sean was right as usual haha

By the way, I forgot to say this but the prop. valve I have is a used one that my friend gave me when he parted his car. What an asshole haha

Ordering a new valve right now !
 
Discussion starter · #30 ·
Sean485 said:
While I do pride myself on being right as much as possible, I would make sure that you can't remove the valve and blow air back through it reverse direction the fluid flows.
Click to expand...
Already done my friend, I tryed to push back aire from the rear caliper ports and still nothing, 100psi is way over what it normally takes to push back the caliper piston in ...

The last thing I could do is tap all the ports on the valve with NPT thread, use some plugs and adaptors I have at my hydraulic shop and put 2000psi in it on the test bench. But that would be useless after the test we did this morning with my vacuum pump ... The poppet or check in the valve is stuck we are 100% sure.

Thanks for everything Sean, always there to give me a hand my friend I highly appreciate it !

Sean boss level :rofl:
Image
 
Discussion starter · #32 ·
Red1991TSI said:
Any way to poke out the passages with a piece of wire or something else?
Click to expand...
Not without disassembling it, when it's in your hand it's more easy to see how it works. My friend nothing pass in both direction.

My pick-up has been schedule for the valve, I hope they will have time today ... :)
 
#34 ·
My money is more on the distribution valve being locked for that output. Sometimes an air hose from a compressor blown from the line at the cylinder backwards to the valve will unlock them.
 
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Discussion starter · #35 ·
BISHILVR said:
My money is more on the distribution valve being locked for that output. Sometimes an air hose from a compressor blown from the line at the cylinder backwards to the valve will unlock them.
Click to expand...
I hope that's where you would put money after the test I've done ... :)

Thanks for the help bro, that confirm me that I'm not that stupid for thinking that too haha ;)
 
#36 ·
I didnt read the posts, I see that it looks like you ran some tests? I didnt feel like reading 3 pages of posts is all, just the first page.
 
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Discussion starter · #37 ·
Got my new oem proportional valve in my hand. Guess what, I can push air in it with my mouth and it pass for the rear brakes.

Et voila now brakes should work !

Thanks guys for your help, I'll never be where I'm today without DSMTalk. A big family of broke dreamers :rofl:
 
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