Master cylinder problems

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roymck
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Master cylinder problems

Post by roymck » Fri Mar 22, 2019 12:29 pm

Can I swear on here? Bloody New Wilwood master cylinder is doing my head in . Fitted it to car after bench bleeding as per instructions . Problem is it’s not feeding fluid through the system . So if I put the output pipe onto a bleed tube it will feed fluid out on the down stroke but then suck it back on the up stroke . If I push the pedal down and hold it down then pinch the bleed tube and release pedal it will not suck new fluid from the resovoir into the pipe ready for the next stroke . If I then unpinch the tube there has been a vacumn created and you can hear it suck air back instead of taking new fluid in .
So obvious faults , removed cylinder and stripped it down to check seals , all looks ok . Checked for free play at the clutch pedal pushrod , all fine. It must be the transfer port from reservoir to cylinder not allowing new fluid into the cylinder on the return stroke.
So what is it drilled wrong or in wrong position , any thoughts
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roymck
RSSOC Member
Posts: 1093
Joined: Tue Mar 24, 2009 11:33 am
Location: Dorking Surrey
Has thanked: 15 times
Been thanked: 24 times

Master cylinder problems

Post by roymck » Fri Mar 22, 2019 2:36 pm

Is this the problem , I think it is . Going to email Willwood in California later . I don’t think this second hole/port has been drilled properly so when cylinder returns it’s not taking the fluid back into the system from the reservoir to replenish the cylinder with fluid again .
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