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Clutch losing pressure?

 
Old 03-08-2019, 07:59 AM
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Default Clutch losing pressure?

I just bled my clutch with new fluid because the other day it randomly lost pressure when slowing down or deacelerating in gear. Still didnt change it. I bled it twice and still losing pressure randomly. I looked under the dash and some oil coming out from the master cylinder not dripping but was oily. My guess is my master cylinder is bad? Do I need to change the slave too or just thr master cylinder?
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Old 03-08-2019, 08:18 AM
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Its very common for the master to leak when fluid is dirty (best to change fluid in reservoir every other oil change. Just turkey baster out old fluid, wipe clean, pour in fresh. No need to crack bleeder screw. Fresh fluid will circulate with clutch use).

So maybe that leak is from before, or maybe it needs a little more time with fresh fluid to stop leaking. Both master and slave are robust and rarely really go bad.

Are you sure all the air is out?
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Old 03-08-2019, 08:37 AM
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I did the whole cleaning thing and did it 3 times 3 different days cuz thr fluid would get dirty from the old oil I guess in the lines. I bleed it 3 times. I think I have crankwalk play and as to why my clutch is being weird....
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Old 03-08-2019, 05:00 PM
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Ok, you just said some contradictory things, so there appears to be some confusion.

The swap fluid in the reservoir thing is a preventative maintenance only. It can't fix a problem.

So you need to:

Do a proper, thorough gravity bleed. This involves taking off reservoir cap, cracking open bleeder screw on slave, with a clear hose attached, and letting it bleed, bleed, bleed until clear fluid comes out with no bubbles.

Its of paramount importance that at no time during this process do you let the reservoir run dry. So it helps to have someone topside topping it off, and have plenty of fluid on hand.

There is no normally no need to pump the pedal during this gravity bleed. Just let gravity pull the fluid out.

Later, when its all clean and nice, you can do periodic reservoir fluid swap to keep it clean.

It sounds like you have a combination of old, probably wet, contaminated fluid and air in the lines. Once you have good fluid and no air, clutch will probably work well.
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