Clutch bleeding help needed

[gwb]

So all, we got a brand new (not rebuilt) slave and napa master cylinder and full 240sx braided hard line. We are having problems during the bleeding process. We cannot seem to get a lot of fluid down to the slave cylinder. I tried forcing fluid down into the hose using a syringe until it poured out from the bleed valve onto the cement. Thought that was all good and still no luck. Something this simple is driving us nuts! Any kind of help or tutorial would be appreciated or way to find if the master is defective or not would help.

[datzenmike]

New or rebuilt does not guarantee that it works. Loosen the hard line at the master and hold a rag over the outlet. Pump the clutch and see is there is anything coming out. If not the master may be pooched.

 

It may have air trapped in the end so give it a few to clear it and reconnect the hard line and try again.

[banzai510(hainz)]

I put my finger on the hole inside the master and have somebody pump the master and see if its startrs to suck/push

 

I had a clutch master not push fluid and this what I did.

 

I never seen a bad master: in 20years of owning 5 Datsuns but

If you push the pedal and bubbles come up inside the resivoir then most likly its bad.

[ggzilla]

Mike outlined the correct procedure. You must bleed the master cylinder BEFORE you bleed the slave cylinder. Sometimes it works OK if you don't do that, but it is always better to do it.

 

I have seen bad master cylinders that were "new". If that is the problem you just return it and get another.

[hang_510]

If you push the pedal and bubbles come up inside the resivoir then most likly its bad.

not true. the air in the piston/line will be released into the reservoir if you keep the pedal pushed in.

 

 

put a piece of clear tubing on the bleeder of the slave.

open the bleeder(keep the reservoir full!!), it should drain out w/o any other input. if it does not, then i would start looking at a clogged line.

 

close the bleeder.

 

now your helper leg can pump it up and bleed as normal.

[gwb]

Anyone have a list of steps we should complete to bleed it?

[ggzilla]

Here is a list of steps:

 

1. put a piece of clear tubing on the bleeder of the slave.

 

2. open the bleeder(keep the reservoir full!!), it should drain out w/o any other input. if it does not, then STOP. Find and fix the problem before continuing.

 

3. put the tubing in a glass filled with a little brake fluid, so that the tubing end is under the fluid.

 

4. Pump the pedal three times

 

5. Close the bleeder

 

You are done.

[gwb]

Sounds simple enough except for that if we open the bleeder, then no fluid comes out on its own. Do you think this would be caused by the braided hard line? This is what I bought http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=120587237388&viewitem=&sspagename=STRK%3AMEWNX%3AIT

[banzai510(hainz)]

Sounds simple enough except for that if we open the bleeder, then no fluid comes out on its own.?????????

 

make sure cap is off so the fluid can run down. It might not if cap on.

 

Put you finger in the hole and PUMP MOFO!!!!!!!!!!

[ggzilla]

if we open the bleeder, then no fluid comes out on its own. Do you think this would be caused by the braided hard line?

No, braided line cannot cause this, unless the line is defective.

 

Easiest way to verify, remove the hard line from the master. Fluid come out on its own from the master?

[gwb]

No, braided line cannot cause this, unless the line is defective.

 

Easiest way to verify, remove the hard line from the master. Fluid come out on its own from the master?

 

Yes it does

[ggzilla]

Fluid comes out if you remove the hard line.

 

If you connect the hard line to the master, and disconnect it from the slave, and fluid doesn't come out, throw the hard line in the trash and fit a new line.

[gwb]

Fluid comes out if we removed it from the master and open the bleeder on the slave and use a syringe to push fluid through. We can't get a steady stream if we pump the clutch pedal

[ggzilla]

use a syringe to push fluid through

Never heard of anyone doing that, what does it prove? Nothing, except that the bleeder is not blocked.

 

There are two steps to bleeding. 1. The master cylinder must work. 2. The slave cylinder must work. It sound like you are stuck on #1.

 

QUESTION: Have you bled the clutch master cylinder yet? This is done at the master, and has little to do with the clutch slave cylinder.

[gwb]

How do I go about bleeding the master cyl?

[ggzilla]

How do I go about bleeding the master cyl?

Follow the directions that come with a new master cylinder.

 

Or:

1. Loosen (crack) the hard line at the master and hold a rag over the outlet.

2. Have an assistant pump the clutch to the floor and hold it. If nothing comes out, go and buy another master cylinder.

3. Tighten the line, then the assistant can let up on the pedal.

4. Repeat 1-3 three times. You are done.

 

After this, then bleed the slave.

[gwb]

Got it, thanks ggzilla! I had to adjust the M.S/ clutch pedal linkage. Before it was not pumping out any fluid. Tomorrow I will attempt to bleed the slave.

[ggzilla]

Glad to hear it worked!

[hang_510]

Tomorrow I will attempt to bleed the slave.

make it bleed!

[gwb]

geez!