which master cyl. reservior goes where? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigvinnie · 02-02-2003, 08:28 PM

Can't remember if the front reservior serves the back brakes or verse visa... anyone know for sure?

**Palf70Step** · 02-02-2003, 08:51 PM

On my 70...The rear serves the front, and front to the rear. I am told that the C20s do front-front rear-rear.
I'd be curious to know if it really matters.

bigvinnie · 02-02-2003, 09:55 PM

reason why I ask is cuz I'm losing fluid from the rear reservior and I can't tell where it's going... it could very well be draining into the power brake booster... nice...

72K10 · 02-03-2003, 07:13 AM

usually if you're losing fluid from the rear reservoir, it's going into the front reservoir. Which might not sound too bad, but what it means is the seal between the two has gone south. Time to replace the master cylinder. I recently bought a new (not remanufactured) one from NAPA for about $35.

bigvinnie · 02-03-2003, 08:33 PM

it doesn't appear as tho fluid is going to the front reseervior, since it's also losing fluid, but not as fast as the rear.... I think I'll pull it and look down into the brake booster, pretty sure that's where it's going...

Earl Junior · 02-03-2003, 08:35 PM

On my '68 C-10 the master cylinder is front-front and rear-rear.

crazy longhorn · 02-03-2003, 11:32 PM

Its probably leaking into to booster. Does the brake peddle drift away from your foot, while sitting at a stop light?

bigvinnie · 02-04-2003, 06:00 AM

no, doesn't seem to be fading at all... I'll know a lot more once I get it un-bolted from the booster...

Edmond · 02-04-2003, 05:13 PM

I only replaced the cylinder on my truck little over a week ago.
It was leaking fluid also from the rear resevoir. Mine leaked between the booster and the cylinder itself.
On my C/20 the rear resevoir goes to the front disc brakes.

Cya,
Edmond

02-02-2003, 08:28 PM	#1
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	which master cyl. reservior goes where? Can't remember if the front reservior serves the back brakes or verse visa... anyone know for sure? __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

02-02-2003, 08:51 PM	#2
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,268	On my 70...The rear serves the front, and front to the rear. I am told that the C20s do front-front rear-rear. I'd be curious to know if it really matters. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

02-02-2003, 09:55 PM	#3
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	reason why I ask is cuz I'm losing fluid from the rear reservior and I can't tell where it's going... it could very well be draining into the power brake booster... nice... __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

02-03-2003, 07:13 AM	#4
72K10 Registered User Join Date: Dec 1999 Location: New York Posts: 288	usually if you're losing fluid from the rear reservoir, it's going into the front reservoir. Which might not sound too bad, but what it means is the seal between the two has gone south. Time to replace the master cylinder. I recently bought a new (not remanufactured) one from NAPA for about $35. __________________ RLTW 70C10 72K10 72K10 Cheyenne 72C10 Cheyenne Super

02-03-2003, 08:33 PM	#5
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	it doesn't appear as tho fluid is going to the front reseervior, since it's also losing fluid, but not as fast as the rear.... I think I'll pull it and look down into the brake booster, pretty sure that's where it's going... __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

02-03-2003, 08:35 PM	#6
Earl Junior Cadillac power Join Date: Oct 2002 Location: North Idaho Posts: 296	On my '68 C-10 the master cylinder is front-front and rear-rear. __________________ Just for the record, if I'm down to my last potato, I'm not sharing it with a guy who wants to kill me so he can get a better supply of virgins in paradise. That lesson is a little thing I call Economics 101, infidel style. --Scott Adams author of Dilbert

02-03-2003, 11:32 PM	#7
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	Its probably leaking into to booster. Does the brake peddle drift away from your foot, while sitting at a stop light? __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

02-04-2003, 06:00 AM	#8
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	no, doesn't seem to be fading at all... I'll know a lot more once I get it un-bolted from the booster... __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

02-04-2003, 05:13 PM	#9
Edmond Registered User Join Date: Jan 2000 Location: The Netherlands Posts: 1,063	I only replaced the cylinder on my truck little over a week ago. It was leaking fluid also from the rear resevoir. Mine leaked between the booster and the cylinder itself. On my C/20 the rear resevoir goes to the front disc brakes. Cya, Edmond __________________ 1971 Chevy C/20 Longhorn, 350/TH400, Edelbrock Performer, IMPCO 425 LPG Carb 1974 Chevy Camaro Z28 (Original) ------------------------- The Netherlands



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