I bought a new master cylinder for the clutch and I am trying to bleed the system but it seems like the master isn’t building up pressure at all. Any advice on bleeding the system I feel like there’s a fair amount of air in the line.

 

 

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Are you following the attached procedure?

I've had good success with a big syringe and appropriate sized tube and injecting fluid up from the bleed screw to the master taking with it all the air bubbles.

46 minutes ago, grannyknot said:

I've had good success with a big syringe and appropriate sized tube and injecting fluid up from the bleed screw to the master taking with it all the air bubbles.

I learned the opposite on my 325is.  Syringe with a long tube down the slaves master pulling out the bubbles until it was solid fluid.  Did it standing up!

Another trick is getting something the right length and push the pedal down then prop whatever on the front of the driver's seat to hold it down. I have a claw hammer that works good but I have to move the seat forward.  You can also prop something on the bottom of the dash.

Buy speed bleeders too, they're great IMHO.

Edited November 20, 20177 yr by siteunseen

Fill the master cylinder with brake fluid. Remove dust cap from bleed screw.....slide tube onto bleed screw and up into reservoir. Open bleed screw and get helper to slower push in clutch pedal until no bubbles. Lock bleed screw.

Edited November 20, 20177 yr by Diseazd

Like bench bleeding a master cylinder.  

You can use a clothes pin to hold the hose into the reservoir.

My buddy lent me his bleeding tool. This thing makes bleeding clutch and brakes a simple 1 person job with no need to touch the clutch or brake pedal. You do need a compressor to use this.

https://www.nationaltoolwarehouse.com/Vacuum-Brake-Bleed-Kit-P30449.aspx?gclid=Cj0KCQiAgNrQBRC0ARIsAE-m-1w9GBS_eXX5JTgHEp0bStUHgJmPeusMvLWvUBowSdqJJ-zpbIXog3kaAmFVEALw_wcB

That's what I need!  Thanks for posting, I'd never heard of that.  Harbor Freight has one too, $33.  

 These work great.

58 minutes ago, rcb280z said:

 These work great.

Can I use one of those by myself, no one needed to push the pedals down?

Thanks Bob.  Happy Thanksgiving. 

https://www.pegasusautoracing.com/productdetails.asp?RecID=10387 

...or this instead for a few dollars (or build your own) which you can use all by yourself but you do need to push the pedal down,

I use this to bleed the brakes on the race car, which I do in between races and I don't use speed bleeders (don't need them with this bottle set-up. Jack the car up, remove front wheels, connect hose and bottle to right rear bleeder, loosen bleeder, remove MC cap, pump brakes, refill MC, close bleeder, repeat. Check petal, repeat as needed. Works very well on the clutch MC/slave too.

 

19 minutes ago, siteunseen said:

Can I use one of those by myself

Sure can, one man bleeder, IIRC. . I'm beginning to wonder 

Happy Thanksgiving to you too.

Going to have me a couple shots of Patron and then a couple beers. Not necessarily in that order. Then some turkey.