Brake booster leaking vacuum - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans Advertise
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Suspension - Brakes - Steering
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-11-2019, 05:53 PM
Dclifton32's Avatar
Registered User
 
Join Date: Oct 2015
Location: Port Orange, Fl
Posts: 323
Wiki Edits: 0

Thanks: 0
Thanked 11 Times in 11 Posts
Brake booster leaking vacuum

My new dual brake booster is leaking. I found this after my SBC would no Idle down. I don't have a boot on the booster, do you think it would help.
Thanks
Dclifton32

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-11-2019, 06:33 PM
rip-tide's Avatar
Magazines have “ISSUES”
 

Last journal entry: Looks good
Join Date: Mar 2017
Location: Woodstock, GA
Posts: 939
Wiki Edits: 0

Thanks: 17
Thanked 323 Times in 234 Posts
How did you find the leak, unplug the booster and cap the line?

Boot is a dust cover, check the check valve, that black thing the vac hose connect to. Also make sure the check valve is seating good in the grommet .
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-11-2019, 09:11 PM
Dclifton32's Avatar
Registered User
 
Join Date: Oct 2015
Location: Port Orange, Fl
Posts: 323
Wiki Edits: 0

Thanks: 0
Thanked 11 Times in 11 Posts
I can put my finger over the check valve and engine runs smooth. I took the booster off and put a vacuum pump on the booster and I couldn't get more than 15 in vacuum. This pump pulls 30" of vacuum easily. I also put a bag on the petal side of the pump and applied the vacuum again and it sucked the air out of the bag.
Thanks
dclifton32
Reply With Quote Quick reply to this message
 
  #4 (permalink)  
Old 02-12-2019, 05:43 AM
Bob37pont's Avatar
Curmudgeon at Large
 
Join Date: Jan 2018
Location: Astatula, FL
Posts: 289
Wiki Edits: 0

Thanks: 201
Thanked 52 Times in 44 Posts
The diaphragm in the booster is bad. New booster should be under warranty, exchange it.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-12-2019, 06:31 AM
Dclifton32's Avatar
Registered User
 
Join Date: Oct 2015
Location: Port Orange, Fl
Posts: 323
Wiki Edits: 0

Thanks: 0
Thanked 11 Times in 11 Posts
I will thanks, I have never seen one do that before.

Thanks again
dclifton32
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-12-2019, 11:39 AM
rip-tide's Avatar
Magazines have “ISSUES”
 

Last journal entry: Looks good
Join Date: Mar 2017
Location: Woodstock, GA
Posts: 939
Wiki Edits: 0

Thanks: 17
Thanked 323 Times in 234 Posts
Quote:
Originally Posted by Dclifton32 View Post
I can put my finger over the check valve and engine runs smooth. I took the booster off and put a vacuum pump on the booster and I couldn't get more than 15 in vacuum. This pump pulls 30" of vacuum easily. I also put a bag on the petal side of the pump and applied the vacuum again and it sucked the air out of the bag.
Thanks
dclifton32
Reads like you nailed it .... cool
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-12-2019, 12:25 PM
Old(s) Fart
 
Last wiki edit: Wheelbase database
Join Date: Jan 2007
Location: Virginia
Posts: 5,402
Wiki Edits: 1

Thanks: 120
Thanked 640 Times in 552 Posts
Before you trash a brand new booster, did you check the seal between the M/C and the booster? GM factory boosters use a rubber seal at that location. If that seal is missing, you'll have a massive vacuum leak.

Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-12-2019, 01:27 PM
Dclifton32's Avatar
Registered User
 
Join Date: Oct 2015
Location: Port Orange, Fl
Posts: 323
Wiki Edits: 0

Thanks: 0
Thanked 11 Times in 11 Posts
I purchased from Speedwaymotors, they said they would take it back.
Thanks everyone for the help
Dclifton32
Reply With Quote Quick reply to this message

Recent Suspension - Brakes - Steering posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in



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

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
350 valve covers leaking and leaking and leaking 85cjsm350 Engine 13 04-17-2016 08:35 PM
Brake booster vacuum leak 70 ElCam Suspension - Brakes - Steering 11 10-04-2010 12:30 AM
power brake booster vacuum canister?? Ed ke6bnl Suspension - Brakes - Steering 1 10-21-2004 05:33 PM
brake booster vacuum problem spankthru Engine 1 06-18-2003 08:57 PM
vacuum brake booster 48Man Suspension - Brakes - Steering 1 01-14-2003 07:10 AM


All times are GMT -6. The time now is 07:11 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.