Re: Brake Fluid question. DOT 5?
[Re: B1MAXX]
#2763295
04/13/20 08:34 AM
04/13/20 08:34 AM
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Joined: Jan 2008
Posts: 1,211 Minn
SportF
pro stock
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pro stock
Joined: Jan 2008
Posts: 1,211
Minn
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I saw a video of dot 5 swelling seals is that true.? That's the only reason I have been hesitant to use it. If this was true then that means it would/could cause brake failures. Can you imagine the legal liability for someone selling a product, that if misused, could kill you? What is interesting about this whole question is that when this came up 10 years ago or more, the majority said don't use it. Its good to see "we" have become more informed.
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Re: Brake Fluid question. DOT 5?
[Re: B1MAXX]
#2763839
04/14/20 12:40 PM
04/14/20 12:40 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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So just drain as best I can and refill? you need to flush the dot 3 out. dot3 and dot 5 are not compatible. when I switched over I took the master cylinder, distribution block and wheel cylinders apart and cleaned all the dot 3 off/out of them. I took a couple cans of brake cleaner and flushed all the lines. it's a little work but not difficult.
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Re: Brake Fluid question. DOT 5?
[Re: lewtot184]
#2763991
04/14/20 08:26 PM
04/14/20 08:26 PM
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Joined: Apr 2006
Posts: 4,220 West Plains, MO
DrCharles
master
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master
Joined: Apr 2006
Posts: 4,220
West Plains, MO
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DOT 3/4 and DOT 5 are not miscible. But they do not react with each other. The glycol and the silicone oil will form two separate layers if mixed. That's all. You want to get all the glycol out that you can, only because any that is left will gradually attract water and cause corrosion where it sits. DOT 3 & 4 also have a lower boiling point than 5, so any glycol left in the system will boil first
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