Brake Fluid?????
Thread Starter
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Joined: Jan 2006
Posts: 55
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From: Munster IN
Brake Fluid?????
I have a 78 and the brake pedal recently feels a little mushy. I do not see any visible leaks, but I took the top off the master cylinder and noticed the fluid was down about 1/4". What type of fluid should I use to fill the master cylinder?
Burning Brakes
Joined: Oct 2006
Posts: 1,089
Likes: 43
From: Native Californian CALIFORNIA
Army
If the resevoir is down in fluid there are only two reasons:
1. Leaking fluid
2. Worn pads creating a long throw of the piston, using more fluid.
If you arbitrarily add fluid and then later replace your brake pads you must compress your calipers which will force brake fluid out of your master cyclinder. It creates an unwanted mess.
1. Leaking fluid
2. Worn pads creating a long throw of the piston, using more fluid.
If you arbitrarily add fluid and then later replace your brake pads you must compress your calipers which will force brake fluid out of your master cyclinder. It creates an unwanted mess.
Former Vendor
Joined: Nov 2005
Posts: 683
Likes: 1
From: Mounds View Minnesota
To answer the actual question Valvoline Synpower is great stuff.
However, the brake fluid will drop as the pads wear.
don't add fluid untill you change pads.
Well unless you have a leak. Then fix the leak and then add fluid...
However, the brake fluid will drop as the pads wear.
don't add fluid untill you change pads.
Well unless you have a leak. Then fix the leak and then add fluid...
Melting Slicks
Joined: Feb 2002
Posts: 2,625
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From: Cut n Shoot TX
is this valvoline DOT 3?? If not tell us more about it....
Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Brake fluid absorbs water over time. I would drain the old stuff an replace it. I had been using the synpower for many years.
Melting Slicks
Joined: Feb 2002
Posts: 2,625
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From: Cut n Shoot TX
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Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Yes, it is good stuff compatable. years ago I did the silicone and had to do the total flush. I went back to syn power when I did all four calipers and rotors. Now I use 600 degree racing stuff. Syn is like $7.00 per qt. 600 deg. is more like $40. I only get about two sets of carbon metalic pads before the rotors are gone also
I have a vacuum bleeder and one qt can replace the whole system even with squishing out all the pistons
I have a vacuum bleeder and one qt can replace the whole system even with squishing out all the pistons