stock master cylinder with disc brakes... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hewlett2002000 · 07-26-2007, 05:24 PM

i got a question for you guys. my truck has disc front and drum back with the stock master cylinder. is this right? my front brakes stick a little bit and i figured it was a caliper problem. im just wondering.
thanks,
John

19GMC63 · 07-26-2007, 05:30 PM

is it a dual or single reservoir?

Jonboy · 07-26-2007, 05:59 PM

You need waaaay more fluid volume to move the piston in a disc brake caliper than a drum brake cylinder. The disc master cylinders have a lot larger front reservoir to move more fluid

hewlett2002000 · 07-27-2007, 08:24 PM

its a singal reservoir. so should i put it on my list to change it?

Jonboy · 07-28-2007, 09:27 AM

yes, definitely.

19GMC63 · 07-28-2007, 02:00 PM

yep. But you'll have to split the lines, and the front lines to the discs are smaller than the rears. You just need a dual reservoir MC with a prop valve.

53lowdown · 07-28-2007, 05:35 PM

I've got the same situation. Mine seems to stop ok, but I've only driven it about a block (off road) - you really have to mash on the pedal though. There's usually master cylinders and brake boosters and proportioning valves off of S10's on ebay. I'm thinking about getting one of those and seeing if it will work. Here's an example. Would this work?
http://cgi.ebay.com/ebaymotors/03-CH...spagenameZWD1V

hewlett2002000 · 08-03-2007, 04:42 AM

ok i found a dual reservoir master cylinder for a 72 chevy C10 for disc front and drum back. will this work? it looks like it will bolt strait up. its on the autozone site. Part Number: NM1494 . please let me know.
thanks,
John

**Chevy Fleetside** · 08-03-2007, 09:51 AM

Quote:

Originally Posted by hewlett2002000

ok i found a dual reservoir master cylinder for a 72 chevy C10 for disc front and drum back. will this work? it looks like it will bolt strait up. its on the autozone site. Part Number: NM1494 . please let me know.
thanks,
John

It should work. You can use up to 87 if you want. You will need the porpotioning valve also. If you can go to the yard you can just take the valve off of a 70's chevy truck along with the front brake lines and they work just fine. I took one out of a 75 and set it in my 65 to see if the line already bent would work and it fit like it belonged there. You will need to run lines from the master to the valve. I have a tube bender and double flaring tool..

John

07-26-2007, 05:24 PM	#1
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	stock master cylinder with disc brakes... i got a question for you guys. my truck has disc front and drum back with the stock master cylinder. is this right? my front brakes stick a little bit and i figured it was a caliper problem. im just wondering. thanks, John __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

07-26-2007, 05:30 PM	#2
19GMC63 Registered User Join Date: Nov 2006 Location: Nashville, TN Posts: 1,510	Re: stock master cylinder with disc brakes... is it a dual or single reservoir?

07-26-2007, 05:59 PM	#3
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: stock master cylinder with disc brakes... You need waaaay more fluid volume to move the piston in a disc brake caliper than a drum brake cylinder. The disc master cylinders have a lot larger front reservoir to move more fluid

07-27-2007, 08:24 PM	#4
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: stock master cylinder with disc brakes... its a singal reservoir. so should i put it on my list to change it? __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.

07-28-2007, 09:27 AM	#5
Jonboy Slots go on anything! Join Date: May 2003 Location: Richardson, TX Posts: 5,957	Re: stock master cylinder with disc brakes... yes, definitely.

07-28-2007, 02:00 PM	#6
19GMC63 Registered User Join Date: Nov 2006 Location: Nashville, TN Posts: 1,510	Re: stock master cylinder with disc brakes... yep. But you'll have to split the lines, and the front lines to the discs are smaller than the rears. You just need a dual reservoir MC with a prop valve.

07-28-2007, 05:35 PM	#7
53lowdown Junior Member Join Date: Feb 2005 Location: topeka, kansas Posts: 258	Re: stock master cylinder with disc brakes... I've got the same situation. Mine seems to stop ok, but I've only driven it about a block (off road) - you really have to mash on the pedal though. There's usually master cylinders and brake boosters and proportioning valves off of S10's on ebay. I'm thinking about getting one of those and seeing if it will work. Here's an example. Would this work? http://cgi.ebay.com/ebaymotors/03-CH...spagenameZWD1V __________________ _______________________________________ 62 SWB BBW (under construction) 86 Vette Convertible Last edited by 53lowdown; 07-28-2007 at 05:37 PM.

08-03-2007, 04:42 AM	#8
hewlett2002000 Registered User Join Date: Dec 2006 Location: Cleveland, Tx Posts: 1,619	Re: stock master cylinder with disc brakes... ok i found a dual reservoir master cylinder for a 72 chevy C10 for disc front and drum back. will this work? it looks like it will bolt strait up. its on the autozone site. Part Number: NM1494 . please let me know. thanks, John __________________ Respect: 1. A feeling of appreciative, often deferential regard; esteem. 2. The state of being regarded with honor or esteem. 3. Willingness to show consideration or appreciation. When you fail to show consideration to others values you are showing disrespect.



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