Vacuum brake booster
Thread Starter
Race Director
Joined: Feb 2005
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Vacuum brake booster
Anyone had any experiences with check valves in these things ? 78 SA in this case...was wondering before I go buy a new booster...
(got a real hard pedal)...brakes were great until suddenly lost the assist...vacuum line/filter ok...
Rich
(got a real hard pedal)...brakes were great until suddenly lost the assist...vacuum line/filter ok...
Rich
Le Mans Master
Joined: Jul 2000
Posts: 6,664
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From: columbia city in
the filter between the intake and the boosters can leak vac as can the hose .the filter is cheap and was bought at autozone ,take in the old one [they dont sell many of these ]check all connections.
Le Mans Master
Joined: Mar 2001
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From: Ann Arbor Michigan
Originally Posted by rihwoods
Anyone had any experiences with check valves in these things ? 78 SA in this case...was wondering before I go buy a new booster...
(got a real hard pedal)...brakes were great until suddenly lost the assist...vacuum line/filter ok...
Rich
(got a real hard pedal)...brakes were great until suddenly lost the assist...vacuum line/filter ok...
Rich
Thread Starter
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Joined: Feb 2005
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Originally Posted by Duke94
If the engine was still running, you should still have had vacuum (boost). I believe the check valve (CV) is there so if the engine quits, you'll still have vacuum in the booster to stop the car (also maintains a constant vacuum in the booster). If you confirmed that vacuum gets through the CV, then it sounds like the booster is kaput.
Thanks...wrench time tomorrow...
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From: Inside the woods living my passion
St. Jude Donor '07-'08
Originally Posted by terry82
the filter between the intake and the boosters can leak vac as can the hose .the filter is cheap and was bought at autozone ,take in the old one [they dont sell many of these ]check all connections.
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Originally Posted by C3Racing
If you have a vac leak @ the booster or the hose you would hear it .. Nasty hissing sound , and will also cause engine drivability problems due to a vac leak.
No hiss or miss...just HARD brake...stood there today listening while it warmed up...even pulled that filter and blew thru it...booster is history..
Thanks guys...
Last edited by rihwoods; Aug 1, 2006 at 12:30 AM.
Melting Slicks
Joined: Jan 2003
Posts: 2,817
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From: Somerset, NJ
Originally Posted by C3Racing
If you have a vac leak @ the booster or the hose you would hear it .. Nasty hissing sound , and will also cause engine drivability problems due to a vac leak.
Pro
Joined: Sep 2002
Posts: 620
Likes: 2
From: San Antonio TX
Originally Posted by rihwoods
Anyone had any experiences with check valves in these things ? 78 SA in this case...was wondering before I go buy a new booster...
(got a real hard pedal)...brakes were great until suddenly lost the assist...vacuum line/filter ok...
Rich
(got a real hard pedal)...brakes were great until suddenly lost the assist...vacuum line/filter ok...
Rich
I tested my vac booster by just sucking on the hose and comparing it to the one on my new daily driver Colorado! I know, go ahead and laugh, but it becomes immediately apparent if there is a leak in the booster. I initially tried my "Mightyvac", and that works also, it just doesn't pull much volume per stroke.
I purchased my booster and a new MC here:.. http://www.piratejack.net/brakebooster.html
The prices were great compared to other places. Everything bolted right up. Granted, I've only had them on for a couple of months and several thousand miles, but so far, so good.
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Melting Slicks
Joined: Jan 2003
Posts: 2,817
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From: Somerset, NJ
Originally Posted by cchristo
I purchased my booster and a new MC here:.. http://www.piratejack.net/brakebooster.html
The prices were great compared to other places. Everything bolted right up. Granted, I've only had them on for a couple of months and several thousand miles, but so far, so good.
Thread Starter
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Originally Posted by cchristo
The check valves can be purchased at any of the auto supply chains for a couple bucks.
I tested my vac booster by just sucking on the hose and comparing it to the one on my new daily driver Colorado! I know, go ahead and laugh, but it becomes immediately apparent if there is a leak in the booster. I initially tried my "Mightyvac", and that works also, it just doesn't pull much volume per stroke.
I purchased my booster and a new MC here:.. http://www.piratejack.net/brakebooster.html
The prices were great compared to other places. Everything bolted right up. Granted, I've only had them on for a couple of months and several thousand miles, but so far, so good.
I tested my vac booster by just sucking on the hose and comparing it to the one on my new daily driver Colorado! I know, go ahead and laugh, but it becomes immediately apparent if there is a leak in the booster. I initially tried my "Mightyvac", and that works also, it just doesn't pull much volume per stroke.
I purchased my booster and a new MC here:.. http://www.piratejack.net/brakebooster.html
The prices were great compared to other places. Everything bolted right up. Granted, I've only had them on for a couple of months and several thousand miles, but so far, so good.
Later,
Rich
Scrambling now to get one...
Pro
Joined: Sep 2002
Posts: 620
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From: San Antonio TX
Originally Posted by ffas23
Thanks for that link to Piratejack. Never heard of them before but they look like they have some nice product at decent prices. I like the anodized finish on your booster in the picture. How does it look up close right in front of you? Does it look like it will last some time especially on a car that may not be driven much? Just curious. Was thinking of sending the power booster on my 67' out to be anodized but for the price this place is getting for a new one this may be the better way to go for the money.
I was very happy with their customer service and speed. Very nice folks to deal with.
As far as the finish. I saved a few bucks and bought the rough finish MC and spent a few hours shining it up. It's not billet but it's a substantial chunk of aluminum.
As for the Booster finish. I don't see why it won't last. As far as I can tell, it's the same anodized finish (can't remember what it's called right now) used on the rear spring bolts, and other metal items around the car. Like any finish, it can be scratched, and if it's down to bare metal, rust can begin to form.
I like the look of the booster, now I just need someone to donate some coated headers so they don't stand out so badly!
Last edited by cchristo; Aug 1, 2006 at 04:41 PM.
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Race Director
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Originally Posted by mirrorfinishman
Where did you find the rebuild parts? and how difficult was it to rebuild the brake booster?
http://www.mbmbrakeboosters.com/kits.html
Rich