CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
March 29, 2015, 02:25:03 AM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
111362 Posts in 12823 Topics by 4913 Members
Latest Member: devodave
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  Maintenance
| | |-+  Brakes Trouble Shooting
« previous next »
Pages: [1] Print
Author Topic: Brakes Trouble Shooting  (Read 550 times)
jdv69z
Hero Member
*****
Posts: 700


69 RS Z/28 52E


View Profile Email
« on: March 03, 2015, 11:54:03 AM »

I've recently had my brakes requiring stiff pedal pressure from my foot. 69 Camaro with front discs. At first I suspected that my calipers were frozen, but I also have a hissing noise which seems to be at the carb throttle bores. I can hear it when the air cleaner is on, but it is noticeably louder when I remove the air cleaner. It been suggested that my brake booster might be bad? Hoe would one check the booster?
Logged

Jimmy V.
ko-lek-tor
Hero Member
*****
Posts: 692



View Profile
« Reply #1 on: March 03, 2015, 12:30:04 PM »

Jimmy, By your own post title (trouble shooting), I would say you may be close to the culprit being under air cleaner. First: Check all hoses and fittings especially where you hear noise.  One way is to get a long piece (arm length) of hose, fuel line size works well, and put one end to your ear and use your other hand to move around area described till you can pinpoint where noise is coming from or visually inspect by taking off all related components (not booster though) and inspect condition, looking for a split or crack. To check your booster, I would use a vacuum pump, like the ones used to suck down an A/C system and see if the booster holds a vacuum.
Logged

Putting you First...Keeps me First. Talent on loan from God. Helping the hobbyist and exposing the fraud
1969 SS/RS 396 coupe Hugger Orange X22 712 bought in 79
1969 SS 350 coupe LeMans Blue 713 bought in 79
1969 307 4spd. coupe Daytona Yellow 711 bought in 85
z28z11
Hero Member
*****
Posts: 692


View Profile
« Reply #2 on: March 03, 2015, 09:59:56 PM »

Jimmy,

I suspect the booster check valve may be involved. Try this link out for some easy checks:

http://www.hotrodders.com/forum/troubleshoot-brake-vacuum-check-valve-152616.html

All kinds of things to consider, but be methodical and you'll find it. Let us know -

Regards -
Logged

1968 Z28 BRG/W
1969 Z28 X77 LeMans/W
1969 X66 L78 Cortez/BVT
1969 Z11 L48
Mike S
Hero Member
*****
Posts: 1248



View Profile
« Reply #3 on: March 04, 2015, 02:30:36 PM »

 I had a '69 Grand Prix develop a bad booster check valve that caused a hard brake symptom and a very noticeable 'hisssss' sound coming from the firewall/booster area but mainly when I applied the brakes.

Mike
Logged

67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
jdv69z
Hero Member
*****
Posts: 700


69 RS Z/28 52E


View Profile Email
« Reply #4 on: March 05, 2015, 02:44:59 PM »

Thanks for the ideas. Will investigate further.
Logged

Jimmy V.
Pages: [1] Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.496 seconds with 18 queries.