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Brake Fluid Dot 3 vs Dot 4..?

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Old 11-15-2002, 07:28 AM
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FASTAZU
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Default Brake Fluid Dot 3 vs Dot 4..?

Can someone tell me what the difference is between Dot 3 and Dot 4
1. Are the compatible?
2. If used in an older system would you need to flush the system be for changing?

Thanks Steve
Old 11-15-2002, 01:10 PM
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bogus
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Default Re: Brake Fluid Dot 3 vs Dot 4..? (We Gone)

DOT 3 is better...

DOT 4, if I remember rightly, is better for storage.

I use Valvoline SynPower. Its a synthetic brake fluid. Works very nicely!
Old 11-15-2002, 01:54 PM
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Mylzi
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Default Re: Brake Fluid Dot 3 vs Dot 4..? (We Gone)

Why not DOT5? There is silicon free DOT5 too.
Old 11-15-2002, 02:17 PM
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Fuzzy Dice
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Default Re: Brake Fluid Dot 3 vs Dot 4..? (Mylzi)

Search the archives for brake fluid ...there's a lot of info in those threads...
Old 11-15-2002, 02:25 PM
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Default Re: Brake Fluid Dot 3 vs Dot 4..? (Mylzi)

Why not DOT5? There is silicon free DOT5 too.
The service manual specifically states not to use DOT5 fluid. It will destroy seals and the ABS system will cause cavitation bubbles in DOT5.

There are a lot of DOT3 fluids that have excellent wet/dry boiling points. I use the Ford HD fluid on the street and ATE Super Blue for track use.

See the bottom of this thread for some good info on fluids and their boiling points: http://forums.corvetteforum.com/zerothread?id=340111
Old 11-15-2002, 03:01 PM
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FASTAZU
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Default Re: Brake Fluid Dot 3 vs Dot 4..? (c4cruiser)

Thanks for the link.. thats what I needed to know..

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