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Join Date: Apr 2015
Posts: 1,397
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Plugs for a master cylinder
Hi, sorry to ask here but the miata board has gone quiet. I think I need to bleed my master cylinder. Based on the video I have watched, I need to bench bleed. I have never done this before so hopefully I don't make things worse. Anyhow, I guess I need to remove the MC from the car and plug all the locations the brake lines screw into.
Any idea where I would get plugs that would screw over and seal where the brake lines were attached? This design seems as dumb as me letting the MC run dry.  Thanks, David |
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03-19-2021, 06:36 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,765
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Do you actually need to screw the plugs in? I've seen plastic plugs, that did a pretty good job of sealing the holes, online and at FLAPS. I think you can get an assortment.
Hmm, not really seeing much online. Maybe I had a vacuum cap assortment and used that short term. I did see that you can get male inverted flare plugs which would screw in. I also saw assortments of silicone plugs that are sold as being used for powder coating which would probably work.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
Last edited by masraum; 03-19-2021 at 06:47 AM.. |
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03-19-2021, 06:43 AM
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Join Date: Dec 2007
Posts: 1,231
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I think if you purchase a power bleeder (like a motive), bench bleeding is usually not necessary. Maybe someone like Fred or Dan J can chime in.
Edit: This might help you as well for bleeding. https://www.napaonline.com/en/p/NDP7001795 .I use vacuum caps to seal the male connectors on the lines. Your local auto parts store may have an assortment for $5-$8. Last edited by RedBaron; 03-19-2021 at 06:55 AM.. |
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03-19-2021, 06:50 AM
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Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,843
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The little plugs used to come with the replacement mc. Recently , I have not been seeing this as much .
I am confused as to why you would need to bleed a mc that is currently on the car ? Usually, you can get a good bleed, without bench bleeding, but when I am replacing a mc, I almost always bench bleed first. You can also , bleed traditionally , by pumping the pedal, holding it down, while loosening the lines right at the master . Good luck! Let me know if I can help .
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03-19-2021, 07:32 AM
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You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,808
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One method of M/C prep on the car:
-Get a short piece of brake line and cut in center. Clean and blow out everything. -Loop them in a circle to dump back into the top reservoir. -Pump fluid through using the pedal. (if on the bench you can use a rounded rod carefully). -Reattach brake lines
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Meanwhile other things are still happening. Last edited by john70t; 03-19-2021 at 08:41 AM.. |
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03-19-2021, 08:39 AM
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Join Date: Apr 2015
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Thanks everyone. I am learning as I go. Trying to help son out.
I called Wilwood and got some further instructions. It appears I was doing something wrong which I will not reveal due to preserving what little reputation I have here. Hopefully the MC will not need bleeding. Thanks again, enjoy the weekend. |
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03-19-2021, 09:38 AM
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Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,843
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Yes, if you did not remove the master cylinder, you should be fine with a good old fashioned 2 man pedal bleed . We all have to learn somehow! I find myself schooled on a regular basis these days
Good luck .
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03-19-2021, 11:09 AM
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Join Date: Oct 2003
Location: Mount Pleasant, South Carolina
Posts: 14,091
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Quote:
This is what I’ve done in and out of the car. |
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03-19-2021, 05:22 PM
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