CJ Master Cylinder Replacement Issue. - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > CJ Master Cylinder Replacement Issue.

KrawlOff-Road.com Sale EventFS: Jeep Fog Light LED Bulbs! Several Brightness Options! *STOP UNWANTED LIGHT BAR NOISE* with Pandemic LED Light Ba

Unread 09-15-2012, 11:47 AM   #1
Registered User
1981 CJ5 
Join Date: Aug 2012
Location: Washington DC, Virginia
Posts: 1
CJ Master Cylinder Replacement Issue.

Folks, I just had to have my Master Cylinder replaced so I could pass the State Safety Inspection. The Inspector's garage installed a rebuilt one ($139.00) and it leaked everywhere! I took it back and made them install a second one. After 4 Master Cylinders I took the Jeep home and installed my own for $19.95

The bad news, my install leaked too. I read in this forum about machining the top of the Master Cylinder so I tried that, no joy.

Long story cut short... The issue with all these Master Cylinders was the lack of breather hole on the cover. I drilled a small hole on the cover, installed the rubber diaphragm, and all the leaks stopped... Looks like rebuilt covers come with the vent hole blocked, drill it out, and get back on the road!

Hope this helps!

SwampAngel is offline   Reply With Quote Quick reply to this message

brakes , master cylinder , oil leak

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.