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NEED Help - Clutch Bleeding Gone Wrong

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Old 04-11-2021, 04:55 PM
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Franknbeans
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Exclamation NEED Help - Clutch Bleeding Gone Wrong

Background:

I just replaced the clutch, pressure plate and flywheel.

When I went to put the slave cylinder back on I had to crack the bleeder open So I could get the push rod depressed to line up the mounting holes.
When I cracked the bleeder it was like a volcano went off. (I read after the fact that the system is always pressurized..??)

Now I can not get the system to hold pressure. The pedal just flaps to the floor.
I read several threads here about how you need to have positive pressure in the system when trying to build it up. So I bought on of those fluid transfer pumps so I could "force" fluid to the slave cylinder. This still isn't working. I can't seem to force the fluid with the pump in the system. If I crack the bleeder and try to pump the system i can barely get any fluid in. It feels like I can not get any fluid past the master cylinder. Yet, if I crack the bleeder with pressure in the system (from the pump, because the clutch pedal doesn't do anything.) I can get fluid out of the bleeder.

My only guess now is the brake master cylinder is bad????

Am I missing something, I've never had any issues like this with any clutch before.
Old 04-12-2021, 03:50 AM
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Conway_160
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Just need to bleed the clutch. You and a friend spend an hour or so bleeding the clutch. Try and find a piece of clear rubber hose so you can see the fluid coming out of the bleeder.
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khnitz (04-13-2021)
Old 04-12-2021, 08:00 AM
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Franknbeans
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Fluid is coming out of the bleeder with no air in it. It has a little pressure now but the pedal won't return to the top all the way.

I decided to see if it was enough pressure to engage the clutch but now the DAMN CAR WON'T START.
Old 04-12-2021, 08:37 AM
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It’s a pain, I always use a pressure bleeder. Position of the bleed port on the slave make it impossible to get the air out efficiently
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Old 04-12-2021, 09:39 AM
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Seems like I got some pressure in the clutch. It won't pop up to the top all the way but I heard this may be a bad spring.

Now, the car will not start. I used a NAPA flywheel, Clutch and PP. From what I heard it is most likely the crank angle sensor that is suppose to read a signal to start. Apparently it isn't seeing the proper signal to start the car.
Old 04-13-2021, 06:27 AM
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khnitz
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Could the flywheel be installed incorrectly? I thought I recall reading something about that affecting the crank position sensor and starting.

@terrasmak what fitting do you use on the Nissan for pressure bleeding? The reservoir cap doesn't tighten down enough for me to get a good seal with an adapter I made (I only use a few pounds of pressure with it....):
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Last edited by khnitz; 04-13-2021 at 09:20 AM.
Old 04-13-2021, 09:08 AM
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terrasmak
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I use the motive bleeder with the cap for brakes. Someone just has to hold it the whole time, although I could probably figure out a better way to hold it on.
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Old 04-13-2021, 12:22 PM
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350ZXLR
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Default Could be the clutch pedal switch

Have you checked the clutch pedal position switch?
​​​​​​
Old 04-13-2021, 02:03 PM
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MicVelo
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Originally Posted by terrasmak
I use the motive bleeder with the cap for brakes. Someone just has to hold it the whole time, although I could probably figure out a better way to hold it on.
BF zip ties.

Regards,

King of Zip Ties

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khnitz (04-14-2021)
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