Why not DOT4?
Thread Starter
Instructor
Joined: Apr 2002
Posts: 172
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From: Annandale NJ
Why not DOT4?
Is there any reason not to replace the brake fluid w DOT4 instead of DOT3 on a C5? I know GM specs DOT3 but don't understand why not DOT4 for a car like this since it has better high-temp characteristics.
:confused:
:confused:
Drifting
Joined: Sep 1999
Posts: 1,431
Likes: 2
From: Munich Bavaria
Re: Why not DOT4? (mbtc5vette)
DOT 4 brake fluid is for "heavy duty" glycol based brake fluids that have a higher wet boiling point of 311 degrees F and a dry boiling point of 446 degrees. This type of fluid is sometimes specified for performance vehicles or those subject to high brake temp.
As far as i know the only reason why they use DOT 3 instead DOT 4 is that DOT 3 can be used longer than DOT 4 fluid. DOT 4 fluid use to absorb water faster than DOT 3 which makes brake fluid changes more often neccessary.
Jochen
As far as i know the only reason why they use DOT 3 instead DOT 4 is that DOT 3 can be used longer than DOT 4 fluid. DOT 4 fluid use to absorb water faster than DOT 3 which makes brake fluid changes more often neccessary.
Jochen
Team Owner
Joined: Mar 1999
Posts: 28,753
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From: San Jose/Bear Valley CA
CA Events Coordinator
Re: Why not DOT4? (mbtc5vette)
I have been using Dot 4 in my brake system for quite some time. The system gets bled quite frequently and it has not been a problem. I use the blue fluid, this way if I have a leak, I know exactly what it is just by the color. ;)
vetterdstr :cheers:
vetterdstr :cheers:
