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C3 1978 Corvette brake fluid capacity

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Old Aug 30, 2008 | 04:27 PM
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Default C3 1978 Corvette brake fluid capacity

I am replacing the entire brake system on a 1978 Corevette. I am replacing master cylinder, hoses, brake lines, calipers and brake pads.

I am considering using DOT 5 instead of Dot 4/Dot 3.

Is DOT 5 a good idea?

How much DOT 5 does the entire brake system need?

Thank You
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Old Aug 31, 2008 | 04:19 AM
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Originally Posted by ixlor8
I am replacing the entire brake system on a 1978 Corevette. I am replacing master cylinder, hoses, brake lines, calipers and brake pads.
Smart move! Go with the stainless steel sleeves to minimize pitting.

I am considering using DOT 5 instead of Dot 4/Dot 3.

Is DOT 5 a good idea?
I changed over my 78 in 93 and than redid in 2002. Because it sits and I'm along the coast, it compromises the pitting of standard steel lined brake calipers.

How much DOT 5 does the entire brake system need?

That's a tough call because you may find yourself bleeding several times to minimize the natural affinity of Dot5 to oxygen. You must bleed slowly. I used drip bleed to successfully bleed the brakes and it remains rock solid since 02. With DOT 5 you can't agitate the fluid otherwise it attracts oxygen. In contrast DOT 3, has a natural affinity for moisture...and therefore the pitting.

Corvette Enthusiast had an excellent article about DOT5 a couple of issues ago. I can scan and post if you can't get a copy. Also search the archives...the forum has had several threads on the topic.
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Old Aug 31, 2008 | 07:02 AM
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Default Brake systems

First - Thanks for the reply.

I have purchase 72 oz of Dot 5 fluid. I am hoping that will cover the initial fill and the bleeding process.

Very good suggestion on the SS sleeves.

I would very interested in seeing the Corvette Enthusiast story about the DOT 5

Thanks Rick
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