Best way for complete brake fluid flush and moving to DOT4?
Thread Starter
JK Freak
Joined: Aug 2010
Posts: 731
Likes: 2
From: Los Angeles, CA
Best way for complete brake fluid flush and moving to DOT4?
I'm getting a a Teraflex Big brake kit and want to swap out all of my reeeeeeeeally old brake fluid in favor of Super Blue DOT 4. I'm wondering what the best way to go about this is. I heard of people using alcohol to flush it totally clean when swapping fluids. What do people who have done this recommend doing to flush the whole system?
Thanks!
Thanks!
Thread Starter
JK Freak
Joined: Aug 2010
Posts: 731
Likes: 2
From: Los Angeles, CA
The only problem is you can't mix Dot 3 and Dot 4 so I need to make sure it's ALL really out I think. I do have a friend and we're doing our JKs together so it should be a lot easier.
JK Super Freak
Joined: Oct 2010
Posts: 1,240
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From: rochester,mn
Make sure the fluid is recommended with the kit. It really don't make sense to run a fluid that the kit isn't intended for. Maybe contact TeraFlex and ask them. No sense if they did all this testing to put something it not intended for kit.
I see this happen all the time in the mechanic field, trying to reinvent the wheel.
I see this happen all the time in the mechanic field, trying to reinvent the wheel.
Thread Starter
JK Freak
Joined: Aug 2010
Posts: 731
Likes: 2
From: Los Angeles, CA
Make sure the fluid is recommended with the kit. It really don't make sense to run a fluid that the kit isn't intended for. Maybe contact TeraFlex and ask them. No sense if they did all this testing to put something it not intended for kit.
I see this happen all the time in the mechanic field, trying to reinvent the wheel.
I see this happen all the time in the mechanic field, trying to reinvent the wheel.
- DOT4 fluid does not absorb water as readily as DOT3 fluid.
- DOT4 fluid has a higher boiling point than DOT3 fluid, making it more suitable for high performance applications where the brake systems are expected to get hot.
That's better for a big brake kit anyway.
why cant you mix them? it wont hurt anything... plus you really wont be mixing much at all. as the fluid drains the newer stuff will go ontop and eventually when all the black shiz is out just bleed em a lil more to make sure you dont have any DOT 3 left. it really wont hurt to mix em, it even says so right on the reservoir too.
and just incase ur still unsure, right from the manual
Mopart DOT 3 Brake Fluid, SAE J1703 should be used. If DOT 3, SAE J1703
brake fluid is not available, then DOT 4 is acceptable. Use only recommended
brake fluids.
and just incase ur still unsure, right from the manual
Mopart DOT 3 Brake Fluid, SAE J1703 should be used. If DOT 3, SAE J1703
brake fluid is not available, then DOT 4 is acceptable. Use only recommended
brake fluids.
guess I had it mixed with Dot 5, so you're right about just flushing it through. Thanks.
Last edited by aermotor; Apr 17, 2012 at 11:30 AM.
JK Super Freak
Joined: Oct 2010
Posts: 1,240
Likes: 0
From: rochester,mn
Originally Posted by jk.bushwacker
why cant you mix them? it wont hurt anything... plus you really wont be mixing much at all. as the fluid drains the newer stuff will go ontop and eventually when all the black shiz is out just bleed em a lil more to make sure you dont have any DOT 3 left. it really wont hurt to mix em, it even says so right on the reservoir too.
and just incase ur still unsure, right from the manual
Mopart DOT 3 Brake Fluid, SAE J1703 should be used. If DOT 3, SAE J1703
brake fluid is not available, then DOT 4 is acceptable. Use only recommended
brake fluids.
JK Enthusiast
Joined: Sep 2011
Posts: 309
Likes: 0
From: Glendale,az
Originally Posted by snopro269
I know you can goto or upgrade to a better rating but cannot go down it will gel up
You can always go up but never down.
The gelling is not an issue hence you can put 4 in a 3 system which would be the same as putting 3 in a 4 system. Problem is 3 doesn't have same water absorption and hydraulic pressure will be affected
