Wilwood master cylinder leaking

[dirty30]

I did not put sealant on my fittings at the master cylinders and obviously no sealant on the brake lines themselves. I've been using a prototype of the pedal box that garagistic now uses for over 4 years now, no leaks. Never had it back apart. Just my experience.

[jpod999]

I'm in the same boat doing brakes with Wilwood masters and proportioning valve on e36 m3 brakes. Any tips? I heard not to use teflon on the fittings, I'm doing double flares wherever necessary.

Bubble flares, rather than double flares, are the BMW style before you get too far.

[dougie30]

The permatex product above works well

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[ogslick]

I'm in the same boat doing brakes with Wilwood masters and proportioning valve on e36 m3 brakes. Any tips? I heard not to use teflon on the fittings, I'm doing double flares wherever necessary.

[jpod999]

I did new lines going from the three masters into the engine bay. I also did new lines going to each front wheel as I removed ABS. I ended up bending the lines and then taking them to a hydraulic shop who did the flares for me. It all worked well when I had everything in place and took my time with it.

[Q8y_drifter]

I redid every brake and fuel hard line on my LS swap as well. Between the manual brake conversion and the 30yr old lines I figured all new stainless is the way to go. If you flare em right and use the proper fittings you shouldn't have any issues.

[dougie30]

Did you mirror the stock system? I used the existing lines that go to from the engine bay to the rear but fabbed new lines going from master to rear line and master to two new in bay lines.

No I made everything from scratch, I have a pedal now firm and does not sink, hopefully fixing the minor leaks at the prop valve and near the rear beam

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[jpod999]

I had to make every brake line for the vehicle by my self, I figured there would be a few leaks

Did you mirror the stock system? I used the existing lines that go to from the engine bay to the rear but fabbed new lines going from master to rear line and master to two new in bay lines.

[dasmanschaft012]

ah makes sense. I am using the existing lines

[dougie30]

how are there so many leaks?? it seems like a fairly simple system to me...

I had to make every brake line for the vehicle by my self, I figured there would be a few leaks

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[dasmanschaft012]

Update: the permatex sealant worked, now it's leaking from 35 other spots...

how are there so many leaks?? it seems like a fairly simple system to me...

[dougie30]

Keep going, make sure all your brake nuts are tight- there's a lot to tighten! Update on my situation: I just successfully got my brakes bled!

Nice! I have a pedal too, it stops the car but just alot of drips

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[jpod999]

Keep going, make sure all your brake nuts are tight- there's a lot to tighten! Update on my situation: I just successfully got my brakes bled!

[dougie30]

Update: the permatex sealant worked, now it's leaking from 35 other spots... 😂

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[1990m3]

teflon tape or similar brush on thread sealant is required for NPT fittings. Without thread sealant you will have leaks. A high quality teflon tape should be fine, I've switched to a brush on sealer on all my machine parts (not car related) and leaks are gone as well the sealant doesn't deteriorate like tape can over time. Just make sure if you use the brush on type to wipe it into the threads and clean off the excess to prevent any of it from getting into your brake system.