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YOUR RESEARCH996 gen1 braking question
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As of 12/15/14 I own a 99 Carrera coupe with 87k and new rear brakes among other upgrades. I am in very cold weather and notice that there is almost an inch of pedal play before the brakes engage. The pedal is quite soft. When the temps rise into the 30's , the issue seems to disappear and the brake resistance and engagement returns to normal. Brake fluid is up. Could it be in need of bleeding or have others here noticed this same issue in extreme cold weather?
Thanks as always for your insights,
Bob
Cannot speak to cold weather but the brakes should have no play and the pedal should not feel soft, in any given condition. When you say "new rear brakes", does that mean new pads or the entire assembly? If you just put in new pads then there is the question of whether any bleeding was done. Have you noticed any pulling on one side or the other? Here is the simple deal - brake fluid is hygroscopic, meaning it will adsorb water. If the brake fluid has not been replaced in the last 2 years it is suspect. That may come into play in very cold conditions. You may have some air in the system as well. Do a full brake new fluid flush and bleed all four corners.
It's an easy DIY to put new fluid in the brake lines. Do it. Fluid is cheap. It has air in it somewhere. Bleed furthest away from reservoir first.. passenger rear, driver rear, passenger, then drivers. Watch res. level and keep it topped up or you will bleed air into the lines again.
Thank you all for the input. I will verse myself on the DYI procedure for flushing / replacing and bleeding the brakes. I have the Pelican parts book, "101 Projects for your 996" I will look there first.
Best,
Bob
While a brake fluid replacement is always a good idea (be mindful of your paint!), the temperature-dependent behavior doesn't sound to me like air in the lines. I wonder if something's up with the brake booster or one of the vacuum fittings...that's where I'd put my money if we were taking bets...
Ice doesn't compress very well, so even if there was enough moisture in the brake fluid to crystallize, I wouldn't expect it to make the brakes that spongy.
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