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I am considering the switch to DOT 4 after 6 years based on the higher boiling points.
In researching, the only negative I read was that the rubber componets may be use to DOT 3 and the switch could cause a leak or rubber component failure.
So.....
Has any forum member experienced a type of rubber component failure from a switch from 3 to 4?
(P.S. I have used Ford HD fluid over the Vert's life)
Many have switched over and no issues I know of but since I'm no expert I'll just refer you to this thread that I keep for reference. Others will chime in.
In researching, the only negative I read was that the rubber componets may be use to DOT 3 and the switch could cause a leak or rubber component failure.
Not sure where you heard that but, no.
P.S. wy in the world do they ship a corvette with DOT3 STILL.
P.S. wy in the world do they ship a corvette with DOT3 STILL.
because DOT3 works with the ABS system. DOT4 has more viscosity and will not let the ABS system pulse the brake calipers fast enough. ALL ABS systems use DOT3. check some other cars if you don't think so.
because DOT3 works with the ABS system. DOT4 has more viscosity and will not let the ABS system pulse the brake calipers fast enough. ALL ABS systems use DOT3. check some other cars if you don't think so.
Wrong. My WRX has ABS and has seen Motul RBF600, ATE Super Blue and Castrol SRF at the track. All are DOT4. No problems. I have ATE Super Blue in the C6. Check the Autocrossing and Roadracing Forum. You'll find quality DOT4 used almost exclusively.
DOT3 might come from the factory, but so do non-directional one-piece rotors. Doesn't mean you should use them if you have something better.
Wrong. My WRX has ABS and has seen Motul RBF600, ATE Super Blue and Castrol SRF at the track. All are DOT4. No problems. I have ATE Super Blue in the C6. Check the Autocrossing and Roadracing Forum. You'll find quality DOT4 used almost exclusively.
DOT3 might come from the factory, but so do non-directional one-piece rotors. Doesn't mean you should use them if you have something better.
San
with post stating NO PROBLEMS with DOT 4. It's reccommended if you track the car. However I bet you have not experienced any problems with DOT 3? Why I say that? If you have same fluid after 6 years and just now changing the fluid....that says you had NO ISSUE. So why switch? Obviously your not tracking your car or you would have changed it years ago. Yes, DOT 4 higher boiling point, but I just bet you have not come close to boiling DOT3 either. Or it would not have been there this long.
Just a thought. There are NO issues with Z06's using DOT 4.
As most forum members have reported here, I haven't ever gotten any complaints or have had experiences where the DOT4 ruined anything or caused any ill effects.
because DOT3 works with the ABS system. DOT4 has more viscosity and will not let the ABS system pulse the brake calipers fast enough. ALL ABS systems use DOT3. check some other cars if you don't think so.
That's 100% wrong, and funny. You should check cars yourself, most makes ship with DOT 4 now.
because DOT3 works with the ABS system. DOT4 has more viscosity and will not let the ABS system pulse the brake calipers fast enough. ALL ABS systems use DOT3. check some other cars if you don't think so.
semi correct thought, although it is DOT 5 which is the one not to use
I have a 2007 C6 and want to do a flush, the owners manual says to use "Delco Supreme 11 DOT3 brake fluid" but I can't find it. I went to the dealership to see what they use. The Dot 3 ($10) on the left is what the car originally used when new. The Dot 4 ($20) (middle) is what they use in the new Corvettes and is okay for the C6. The jug on the right BG ($80) is what the dealership will use if you get the brake flush service. Just want to share this research to maybe save you a trip to the stealership.
First thing I did was flush that old dirty DOT 3 for some DOT 4. Every corvette I saw had black brake/clutch fluid. These cars run hot and degrade the fluid fast, DOT 4 should have been factory like the C8s now come with.
Bigger question, how lazy are you going to get about power flushing the brake fluid every 2 years,
Dot 4 has higher boiling point over Dot 3, but Dot 3 is a little slower about moisture that is pulls from the air to have water in the fluid.
As for least expensive Dot4, and which has the highest dry boiling point when it comes to these least expensive types, its Preston Dot 4 at $12 a quart (enough to do a full brake flush every time, and which you should be doing every 2 years no matter what).
Yes, there are others that have a higher boiling point, but your looking at close to $75 for a quart of them instead.
Wow, I am still here LOL
13 year ago thread revival....awesome thank you.
FWIW. I never did change to Dot 4.
Have used - Ford Hi Performance Dot 3 fluid - every time.
Think I pay about $7 US at the dealer a pint, 4 pints per flush.
Mine is a street car, not necessarily "raced" around town.
Sadly, I never did buy a Tech II to open the ABS valves, I use the activate ABS method before and after a flush whether that helps clean or not.
No issues eg: rust, water, leaks, ABS faults.
PS: I use the two-person bleeding method, not a vacuum pump tool
Brake Fluid DOT 3 vs DOT 4
with post stating NO PROBLEMS with DOT 4. It's reccommended if you track the car. However I bet you have not experienced any problems with DOT 3? Why I say that? If you have same fluid after 6 years and just now changing the fluid....that says you had NO ISSUE. So why switch? Obviously your not tracking your car or you would have changed it years ago. Yes, DOT 4 higher boiling point, but I just bet you have not come close to boiling DOT3 either. Or it would not have been there this long. 
