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Kirkham Motorsports

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Old 11-05-2021, 09:19 AM
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Default brake fluid dot 5 to dot 4

I've have had my backdraft sense 2004 car #84
my question is should i change out my dot 5 to dot 4 ??
wilwood brakes when called them does not recommend dot 5 in any car
so can i flush dot 5 out, and put in dot 4 with the seals i have in my car
any ideas
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Old 11-05-2021, 10:24 AM
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Ed, Flush out a couple of times with alcohol. Then flush Dot 4 through once.
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Old 11-05-2021, 12:24 PM
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what type and strength of alcohol?
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Old 11-05-2021, 12:44 PM
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I use high percentage 91 to 99% Isopropyl alcohol. Some of the stuff in your medicine cabinet is only 70%. 30% water.
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Old 11-06-2021, 09:17 AM
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I know a lot of cobra from backdraft use dot 5 brake fluid , just like to know how many have change to dot 4 . also have they run into any problems after a flush ,and do they think it's worth it ??
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Old 11-06-2021, 10:17 AM
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Why? You've been driving it like that 17 years. What makes you want to change now?

The big problem with 5 is that it can attract water, which then ends up in the calipers. And that's bad for a number of reasons. As long as you flush the system with new DoT 5 fluid regularly, it won't be an issue.
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Old 12-09-2021, 07:20 AM
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Most brake fluid is hygroscopic so I don't really think your fixing anything by changing
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