The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 10-11-2011, 01:21 AM   #1
AustinScott
Registered User
 
AustinScott's Avatar
 
Join Date: Dec 2007
Location: Southington CT
Posts: 544
Master Cylinder / brake Question

I Notice the other day that the brakes on my 68 where not working very well … (truck slowly stopping, pedal to the floor)
So I poked my nose under the hood & noticed when I removed the MC cover/lid that the fluid had drained from the front reservoir to the back reservoir, over filling the back reservoir & spilling out when I removed the cover..
I removed the wheels and drums in front to check for leaks and found none.
Does this passage of fluid from the front to the back mean I have a bad MC ??

Truck Specs:
68 Ton Drum / Drum
Vac boost
All new rear brakes (rebuild kit, drums & flex lines)
New front brakes (rebuild kit, Drums resurfaced, flex lines & wheel cylinders)

NOTE: after the rebuild, I bleed the system 10 different times over a 2 week span, due to the brakes never feeling as firm as they where before I rebuilt them.
They did firm up a bit for a few 100 miles but now the pedal hits the floor after prolonged pedal pressure.
The truck stops but it makes you nervous to drive behind people because ti doesn't stop very quickly any more.

Now I noticed the fluid transferring thing & wonder if I have a bad MC….

Hmm... maybe its time to swap over to Disc…

If it is time which conversion kit is the best bang for the buck ECE or CPP?


Thanks

Scott
AustinScott is offline   Reply With Quote
Old 10-11-2011, 03:33 AM   #2
MacGyver72
Registered User
 
MacGyver72's Avatar
 
Join Date: Sep 2011
Location: Greencastle, IN
Posts: 133
Re: Master Cylinder / brake Question

It DOES sound like you have a bad MC. Your symptoms are what I had on a 62 impala that had one go bad. changing it out should be no problem.
MacGyver72 is offline   Reply With Quote
Old 10-15-2011, 05:57 PM   #3
AustinScott
Registered User
 
AustinScott's Avatar
 
Join Date: Dec 2007
Location: Southington CT
Posts: 544
Re: Master Cylinder / brake Question

well I ended up just buying all new front disc brakes,booster,MC & Lines from POL.
Disc Kit

Booster/MC Kit

Line Kit

Anyone see anything I may have overlooked or need?

I bought all new 5 lug 15" wheels as well so I'm goo there.

Scott
AustinScott is offline   Reply With Quote
Old 10-15-2011, 07:32 PM   #4
hugger6933
Registered User
 
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,001
Re: Master Cylinder / brake Question

The disc brakes will make your truck much more enjoyable to drive.
hugger6933 is offline   Reply With Quote
Old 10-15-2011, 08:40 PM   #5
PanelDeland
I am a Referee of life.
 
PanelDeland's Avatar
 
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,905
Re: Master Cylinder / brake Question

Shoot me a review on the lines please.I have been looking and asking the line co's but I'm not getting replies.

Subscribed
__________________
The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion.
You can't fix stupid,not even with duct tape.
"My appearance is due to the fact that "GOD" does punish you for having too much fun!"
Barrett-Jackson has perfected alchemy,they make rust into gold!
"You can lead a horse to water but you can't saddle a duck"
"Cleverly disguised as a 'Responsible Adult'
"Sometimes your Knight in shining armor is just a retard in tinfoil"
PanelDeland is offline   Reply With Quote
Old 10-16-2011, 01:26 AM   #6
AustinScott
Registered User
 
AustinScott's Avatar
 
Join Date: Dec 2007
Location: Southington CT
Posts: 544
Re: Master Cylinder / brake Question

Quote:
Originally Posted by PanelDeland View Post
Shoot me a review on the lines please.I have been looking and asking the line co's but I'm not getting replies.

Subscribed
Sure will, Cant wait to get this thing "safe" again. I love driving it.
AustinScott is offline   Reply With Quote
Old 12-05-2011, 01:08 AM   #7
AustinScott
Registered User
 
AustinScott's Avatar
 
Join Date: Dec 2007
Location: Southington CT
Posts: 544
Re: Master Cylinder / brake Question

Here is the review on the front Lines.

These are my First set of "pre-bent" lines to install, and from this experience I would do it again in a heart beat.

Some tweaking here and there was necessary, but not much at all, they are a good fit out of the box, (after you unbend the "shipping" bends)

As you can see from the pictures below, I installed these lines not only with my motor in but with Hooker long tube heads on as well. ( I know I'm crazy)

Getting that one piece rear line in-between the headers & the frame rail on the passenger side was twister moment. but doable.

All in all I'm happy I went this route. Take a look at the below pictures and you will see they are a good buy.


Lines right out of the box, "pre bent" for shipping



Label



What you get in the box Left to right
** Booster to passenger side rear brake line cross over
** Booster to Front brake Distribution Block
** Front Driver to Passenger cross over line
** Top bag - 1/4" line plug
** Bottom Bag - Master to Proportional Valve
** Not in picture - Front driver line from Distribution block (6" long)




I like how the front line meets up with the rear line before going down to the frame rail





Pre-bent for the stock hold down clamp



This is where I spent the most time tweaking, (10 min)
The rear line "was" hitting with the shock




Clears the shock now



Lines clear the frame & do not touch the cross-member




Front Cross-member fits great



Driver Side cross-member



Passenger Side cross-member



Passenger Side


Getting this side in was fun,
I bent the old rear line a tad to make it easier,
I could of just tweaked the new line, but taking it in and out was not worth it, due to the headers.





WELL THERE YA HAVE IT

Cheers!

Last edited by AustinScott; 12-05-2011 at 01:21 AM. Reason: spelling
AustinScott is offline   Reply With Quote
Old 12-23-2011, 06:29 PM   #8
shawno72
C/10 junkie
 
shawno72's Avatar
 
Join Date: Nov 2010
Location: Stockton Ca
Posts: 9,143
Re: Master Cylinder / brake Question

These are some great pics. Thanks for the tip on the line kit. I have been trying to decide which kit to get and thanks to you this will be the kit I buy.
__________________
Shawn

70 LWB C10 current driver/project
http://67-72chevytrucks.com/vboard/s...d.php?t=663051
68 SWB C10 Work in progress.....SOLD
http://67-72chevytrucks.com/vboard/s...d.php?t=559520
72 LWB C10 Sold
71 LWB C10 Sold
68 LWB C10 CST Sold


http://youtu.be/kbB0QrBIs9k

My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!"
shawno72 is offline   Reply With Quote
Old 12-23-2011, 08:29 PM   #9
68gmsee
Active Member
 
68gmsee's Avatar
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,822
Re: Master Cylinder / brake Question

Thanks for the follow up.

I would recommend that you send a pic of the line hitting the shock to the vendor. They may not be aware of the problem. Not sure if they would do anything about it, but you never know.
68gmsee is offline   Reply With Quote
Old 12-25-2011, 12:45 AM   #10
slikside
Registered User
 
slikside's Avatar
 
Join Date: Jun 2010
Location: San Diego Co.
Posts: 992
Re: Master Cylinder / brake Question

Great write-up and pics. Thanks for posting.

This may be my next "big project".
slikside is offline   Reply With Quote
Old 06-14-2018, 10:38 PM   #11
AustinScott
Registered User
 
AustinScott's Avatar
 
Join Date: Dec 2007
Location: Southington CT
Posts: 544
Re: Master Cylinder / brake Question

Quote:
Originally Posted by AustinScott View Post
Here is the review on the front Lines.

These are my First set of "pre-bent" lines to install, and from this experience I would do it again in a heart beat.

Some tweaking here and there was necessary, but not much at all, they are a good fit out of the box, (after you unbend the "shipping" bends)

As you can see from the pictures below, I installed these lines not only with my motor in but with Hooker long tube heads on as well. ( I know I'm crazy)

Getting that one piece rear line in-between the headers & the frame rail on the passenger side was twister moment. but doable.

All in all I'm happy I went this route. Take a look at the below pictures and you will see they are a good buy.


Lines right out of the box, "pre bent" for shipping



Label



What you get in the box Left to right
** Booster to passenger side rear brake line cross over
** Booster to Front brake Distribution Block
** Front Driver to Passenger cross over line
** Top bag - 1/4" line plug
** Bottom Bag - Master to Proportional Valve
** Not in picture - Front driver line from Distribution block (6" long)




I like how the front line meets up with the rear line before going down to the frame rail





Pre-bent for the stock hold down clamp



This is where I spent the most time tweaking, (10 min)
The rear line "was" hitting with the shock




Clears the shock now



Lines clear the frame & do not touch the cross-member




Front Cross-member fits great



Driver Side cross-member



Passenger Side cross-member



Passenger Side


Getting this side in was fun,
I bent the old rear line a tad to make it easier,
I could of just tweaked the new line, but taking it in and out was not worth it, due to the headers.





WELL THERE YA HAVE IT

Cheers!
Drove the truck down the highway today... :speeding:. Truck still stops great and I have not had one single issue with the brakes or lines!!!
__________________
68-SWB, 327, hooker headers, spintec mufflers, disk brake 3.5/5 drop, buddy buckets, 200-4R, 2200 stall, 3.73 12bolt Eaton Posi,

My 68-SWB Photo Build Thread

All my Google Albums

Last edited by AustinScott; 06-14-2018 at 10:39 PM. Reason: typo
AustinScott is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 10:10 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com