Re: Silicone Brake Fluid-DOT 5
[Re: LYNCHROAD69.5]
#241307
03/02/09 11:09 PM
03/02/09 11:09 PM
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Joined: Jan 2006
Posts: 174 Upstate NY
Big_John
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Posts: 174
Upstate NY
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Quote:
Big John, I just read a similar article discussing some of the pros and cons of silicone. Some have also reported slightly spoongier feel in the pedal because silicone compresses slightly more.
Yea, there's a lot of stuff written about it.
Some good info here: Brake Fluid
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Re: Silicone Brake Fluid-DOT 5
[Re: 469runner]
#241309
03/02/09 11:22 PM
03/02/09 11:22 PM
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Joined: Jan 2006
Posts: 174 Upstate NY
Big_John
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Posts: 174
Upstate NY
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Quote:
I'm no rocket scientist, but how does a liquid compress?
As I understand it, the space between the molecules changes. I don't know if the DOT 5 fluid really compresses enough to notice, but if it areates easily (mixes with air) the bubbles would compress pretty easily.
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Re: Silicone Brake Fluid-DOT 5
[Re: LYNCHROAD69.5]
#241310
03/03/09 08:26 AM
03/03/09 08:26 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Might have a problem sealing. DOT 5 tends to find its way out a bit easier than DOT 3. But again, it won't eat paint.
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Re: Silicone Brake Fluid-DOT 5
[Re: ]
#241311
03/03/09 09:11 AM
03/03/09 09:11 AM
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Joined: Apr 2005
Posts: 4,920 new berlin wisconsin
Mr T2U
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Joined: Apr 2005
Posts: 4,920
new berlin wisconsin
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the reason some people have a spongy petal when using DOT 5 fluid is because DOT 5 retains air like DOT 3 does moisture. when installing DOT 5 place the OPEN container in direct sunlight for about 1 hour before using. this will release the air trapped in the fluid during shipping, this is why most DOT 5 fluid is shipped in black containers. i have used DOT 5 fluid for around 10 years without any problems.
perception is 90% of reality
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Re: Silicone Brake Fluid-DOT 5
[Re: Mr T2U]
#241312
03/03/09 11:01 AM
03/03/09 11:01 AM
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Joined: Feb 2003
Posts: 18,582 Rust Belt, SW PA
Silver70
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
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After putting hundereds of hours in paint on a restored car, I wouldn't use anything but dot 5. Especially considering the latest one had a leak and had I used dot 3, I'd be repainting the inner fender, frame rail, etc...
I have used it in 2 cars, both manual disc cars and I didn't notice a soft pedal or have any issues. It's not cheap, got the small bottle, they sell quarts also and it was 13 bucks, quarters are 25 or so. But small price to pay over repainting!
68 Road Runner, 69 Belvedere, 71 Challenger Vert 340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z 66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
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Re: Silicone Brake Fluid-DOT 5
[Re: LYNCHROAD69.5]
#241313
03/03/09 11:23 AM
03/03/09 11:23 AM
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Joined: Jan 2003
Posts: 5,138 East Aurora (Buffalo) NY
RoadRunner
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Posts: 5,138
East Aurora (Buffalo) NY
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Yes, moisture will collect. I had to change a dust seal I put in wrong on a caliper, and when I took it apart, there was a little bit of water in the piston area. I had them sleeved with stailess, so no damage, but I gave both sides a good flush anyway. My system was all new also.
A trick I was taught was to place the container of DOT 5 fluid in a pan of boiling water. Makes the small suspended air bubles expand and rise to the top. The fact that it doesn't eat paint away is the biggest reason I use it.
68 Road Runner (383/4speed, post car w/decor pkg) - Major Project 69 Road Runner w/472 Hemi & 4 speed. 70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project 2023 Ford Mach 1
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Re: Silicone Brake Fluid-DOT 5
[Re: Silver70]
#241317
03/04/09 12:16 AM
03/04/09 12:16 AM
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Joined: Dec 2003
Posts: 3,957 West Coast, CA
Troy
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West Coast, CA
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I have DOT 5 in my T/A and I must say that it does feel a little spongy compared to other cars that I have done. just my
....there is nothing like driving my 1968 Hemi Dart around town and having people looking at you like you're nuts!!
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Re: Silicone Brake Fluid-DOT 5
[Re: CrAzYMoPaRGuY]
#241319
03/05/09 12:01 AM
03/05/09 12:01 AM
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Joined: Feb 2003
Posts: 18,582 Rust Belt, SW PA
Silver70
I Live Here
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I Live Here
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Posts: 18,582
Rust Belt, SW PA
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I'd guess the people who thing the pedal feels spongey still have air in the system.
68 Road Runner, 69 Belvedere, 71 Challenger Vert 340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z 66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
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Re: Silicone Brake Fluid-DOT 5
[Re: LimeliteAero]
#241321
03/07/09 08:25 PM
03/07/09 08:25 PM
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Joined: May 2005
Posts: 6,446 NJ-USA
HPMike
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NJ-USA
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Quote:
whats the best way to flush some of my parts I will be re-using during my resto? The master and wheel cylinders have less than 2000 miles on them. also if I remember the calipers are pretty fresh.
Flush them out with alcohol. You can also use some DOT5 to flush it out as well.
In response to the original inquiry, you would have to be just plain silly to use anything but silicone in a freshly restored car. I can show you countless photos of beautiful cars that had the paint destroyed by the DOT3. All of the so called maladies?? well, 25 years of using the stuff, never had a single issue. Spongy pedal?? Unless there was trapped air, frankly it's impossible. It will create tiny bubbles if you shake the bottle or really agitate the fluid while bleeding, but normally they will make their way to the top of the master and not cause any issues.
MB
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