 Strange brake pedal issue., Firmer when the car warms up. |
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| fiid |
 Sep 1 2009, 01:07 PM
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Turbo Megasquirted Subaru Member  Group: Members Posts: 2,827 Joined: 7-April 03 From: San Francisco, CA Member No.: 530 Region Association: Northern California  |
Hey,
My car has a subaru motor, and an A caliper set up up front with a stock 914 rear and no prop valve. What I'm finding is that when the car is at rest, the brake pedal has a bit of slop in it. When the car warms up a bit - say I drive it 10 miles or so; the pedal firms right up and seems to be sitting right on the stop (it's usually about a quarter inch or so of slop). The only think I can think of is that there's some water somewhere in teh system (maybe near or in a caliper) that is expanding when things get hot; and causing the system to pressurize a bit. The car does stop okay but: 1) Could it overpressure and burst something (my guess is no, because hitting the brakes hard will product much much more pressure) 2) is it unsafe? I'm working on my new 914 right now, so I'm trying to avoid putting Anyone else run into something similar? It's always something eh? |
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| McMark |
Sep 1 2009, 01:26 PM
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
If the lines overheat the fluid will boil and you'll lose brake pressure completely.
Could it just be that you have a bubble in the lines? Can you 'pump up' pressure while it's cold by hitting the pedal a few times? |
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| Sleepin |
Sep 1 2009, 01:44 PM
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Advanced Member Group: Members Posts: 3,647 Joined: 20-November 07 From: Grand Junction, Co. Member No.: 8,357 Region Association: Rocky Mountains |
Check your venting on the rear calipers....might be it.
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