Wierd Brake Issue . . . - JeepForum.com
Search  
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 Wrangler Forums > YJ Wrangler Technical Forum > Wierd Brake Issue . . .

Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineFS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitClayton Off Road - Come see us at these events!

Reply
Unread 10-30-2010, 11:09 AM   #1
YJ Newby
Registered User
 
Join Date: Oct 2005
Posts: 155
Wierd Brake Issue . . .

I recently changed the front brakes on my '90 YJ and completely bled the lines [Bled into a clear beer bottle until the new, clear fluid I was adding to the master came through]. I never really had tight brakes since then. Now, in the past week or so, there is absolutely no resistance when applying the brakes until the pedal is depressed almost half way. At that point I really have to mash down on them to get good stopping power. The wierder part [is that a word?], is that I do not have brake lights until I have pressed down beyond the "spongy" period and start getting resistance. Am I looking at a new Master Cylinder?

Thanks for your replies . . .

YJ Newby is offline   Reply With Quote
Unread 10-30-2010, 01:32 PM   #2
Mobile_Homie
Desert Rat
 
Mobile_Homie's Avatar
1994 YJ Wrangler 
 
Join Date: Jun 2008
Location: Winnemucca, NV
Posts: 1,173
I would try bleeding again. Did you change the calipers?? If so, just be sure the bleeder is to the bottom, they can be installed on the wrong sides and if the bleeder is on top, you will never get the air out.
__________________
Mark



Smoke em if you got em!

Click here
Mobile_Homie is offline   Reply With Quote
Unread 10-30-2010, 03:53 PM   #3
Mark05059
Registered User
1989 YJ Wrangler 
 
Join Date: Mar 2009
Location: quechee Vermont
Posts: 4,201
Quote:
Originally Posted by Mobile_Homie View Post
I would try bleeding again. Did you change the calipers?? If so, just be sure the bleeder is to the bottom, they can be installed on the wrong sides and if the bleeder is on top, you will never get the air out.
The bleeder goes to the top so the air comes out. Air rises to the top of the master since the brake fluid is heavier then air. You then open the bleeder and push the air at the TOP out.

Bleeder screws to the top
__________________
1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
Mark05059 is offline   Reply With Quote
Unread 10-30-2010, 10:51 PM   #4
K4KAS
Registered User
1994 YJ Wrangler 
 
Join Date: Sep 2007
Location: Ft Walton Beach
Posts: 462
Already stated above. A left caliper will install on the right side and vise verse. Ensure the caliper is installed with the bleeder screw to the top. They may have given you 2 of the same side caliper.
K4KAS is offline   Reply With Quote
Unread 10-31-2010, 08:30 AM   #5
MWT
Registered User
1994 YJ Wrangler 
 
Join Date: Sep 2006
Location: chandler in
Posts: 85
your master cylinder is bad.
MWT is offline   Reply With Quote
Unread 10-31-2010, 08:40 AM   #6
Mark05059
Registered User
1989 YJ Wrangler 
 
Join Date: Mar 2009
Location: quechee Vermont
Posts: 4,201
Quote:
Originally Posted by MWT View Post
your master cylinder is bad.


Not always the case. Could be air in the lines as well.
__________________
1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
Mark05059 is offline   Reply With Quote
Unread 10-31-2010, 12:05 PM   #7
Old4X
Registered User
1990 CJ7 
 
Join Date: Nov 2008
Location: Ga
Posts: 4,147
Re-set the proportionating valve. Then re-bleed the system, start at back right wheel, end with front left.
__________________
Rust free YJ for sale. Need more room in barn.
Old4X is offline   Reply With Quote
Reply
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.