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Old 07-26-2005, 03:14 AM   #1
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brake fluid

Time to change the brake fluid.
Anyone had some good experience with non-porsche fluid and is cheaper?

Thanks

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Old 07-26-2005, 06:06 AM   #2
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You can use any DOT4 fluid. I use Valvoline because it's available in the quart containers.

One thing I suggest if you don't have it already is the Power Bleeder. It's beautiful and makes complete brake bleeding/fluid change a 20 minute one-man job once the wheels are off. You can get one at www.928gt.com just search for bleeder. The cap size is the same as the Boxster so it does not matter what year model is listed next to the bleeder.
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Old 07-26-2005, 07:38 AM   #3
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You may want to try synthetic brake fluid. Last longer, better for system.

http://www.valvoline.com/pages/products/product _detail.asp?product=51
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Old 07-26-2005, 07:50 AM   #4
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If track use is involved, ATE Blue seems the most common recommendation for the higher temperatures encountered. If not, you can ignore this reply.
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Old 07-26-2005, 07:59 AM   #5
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ATE actually has superior specs compared to the fluid sold by Porsche.
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Old 07-26-2005, 08:09 AM   #6
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IMHO factory fill is ATE Gold which is similar to ATE Blue racing but just has a different color.

ATE Blue racing is far more superior than just any DOT4 fluid

Mark.
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Old 07-26-2005, 08:14 AM   #7
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Brucelee: Sorry, I thought all DOT4 was synthetic.

Tool Pants & markk: Is ATE Super Blue ok for the ABS system? I haven't used it yet, but thought about it. I was told DOT5 was not to be used in an ABS system, so I want to make sure Super Blue is not a similar problem with ABS before I put it in. I'd like to swap to the Super Blue in the Boxster and 928 if it's ok to use. They both call for DOT4 fluid.

Thanks!
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Old 07-26-2005, 09:22 AM   #8
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Ate Super Blue Racing is a very good brake fluid which works great in these cars. Due to the blue color, I'm not sure they can call it "DOT4". Ate Typ 200 is gold in color and is functionally equivalent to Super Blue. Super Blue may be a little easier to find, but you may prefer the Typ 200 because it looks like the stock fluid and won't raise any flags with your dealer.

DOT5 (Silicone) brake fluid should definitely be avoided.
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Old 07-26-2005, 11:29 AM   #9
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http://www.renntech.org/forums/index.php?showtopic=2810
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Old 07-26-2005, 03:50 PM   #10
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Quote:
Originally Posted by deliriousga
One thing I suggest if you don't have it already is the Power Bleeder. It's beautiful and makes complete brake bleeding/fluid change a 20 minute one-man job once the wheels are off. You can get one at www.928gt.com just search for bleeder. The cap size is the same as the Boxster so it does not matter what year model is listed next to the bleeder.
I did my own bleeding job with the Motive Power Bleeder a while back and it was great. The price on the site John points out is outstanding based on my experience (didn't check on the shipping cost, though).

One pointer: if you are also changing pads when using the power bleeder, be sure to relieve the pressure in the bleeder pressure chamber before pulling the pads out/rotating the caliper away from the disc. The bleeder keeps feeding fluid into the caliper cylinders and is relentless - there's no way to hold it back with mere mortal strength or regular hand tools! You don't want to over extend the calipers past reasonable travel and/or waste a lot of brake fluid in draining them just to retract the pistons...

Another tip is to relieve the pressure before you do the last wheel's bleeding and then do a standard "assisted" (pedal-pumping) bleed of the last wheel. This way you don't end up with an overfilled master reservoir that needs to be drained... you pump it down while bleeding the last wheel.
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Last edited by donv; 07-26-2005 at 03:53 PM.
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Old 07-29-2005, 07:07 AM   #11
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thanks for the replys guys..i will try some of that super blue

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