XJ6 & XJ12 Series I, II & III 1968-1992

1983 Jaguar Brake Booster

 
  #2  
Old 03-24-2008, 03:21 PM
Senior Member
Join Date: Oct 2007
Location: Philly
Posts: 327
Likes: 0
Received 0 Likes on 0 Posts
Default RE: 1983 Jaguar Brake Booster

before you start, what were the braking symptoms?
 
  #4  
Old 03-24-2008, 03:31 PM
Join Date: Mar 2008
Location: Powell, Ohio U.S.A. 43065
Posts: 2,521
Likes: 0
Received 57 Likes on 47 Posts
Default RE: 1983 Jaguar Brake Booster

Greetings,

Those boosters rarely fail, the usual symptom is that you can hear a steady vacuum leak when you keep pressure on the pedal.

In the event you are going to change it: unbolt the master cylinder, you do not have to disconnect the fluid pipes unless you choose to. You have to remove the booster with the complete pedal box assembly, by removing the retaining nuts from inside the footwell. With the removed pedal box inverted, you can see how the booster pushrod attaches to the pedal. It's not a too difficult ajob. Best wishes
 
  #6  
Old 03-24-2008, 03:46 PM
Join Date: Mar 2008
Location: Powell, Ohio U.S.A. 43065
Posts: 2,521
Likes: 0
Received 57 Likes on 47 Posts
Default RE: 1983 Jaguar Brake Booster

Follow thehose back from the booster, to the pipeacross the engine bay braces, to the intake manifold. There is a one way vacuum check valve for the booster vac. supply. On early XJ6, they screw directly into the manifold. These used to fail, particularly from icing when cold: the later cars used a plastic check valve installed in the hose from a fitting on the intake. Earlier cars were supposed to be retrofitted, there is an ancient TSB on the subject.

If the fault is indeed related to your booster, the brake pedal should feel firm as stepping on a rock, with little pedal travel.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BrentGardner
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
16
06-01-2019 04:18 PM
jdzubas
XK / XKR ( X150 )
12
10-04-2015 09:14 AM
plums
General Tech Help
0
09-01-2015 06:34 AM
nelsonht
S-Type / S type R Supercharged V8 ( X200 )
2
08-30-2015 06:01 AM
larney
XJ6 & XJ12 Series I, II & III
1
08-27-2015 07:54 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: 1983 Jaguar Brake Booster


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: