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2002 Fiat brakes get stuck on
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bjFiat
New User
May 17, 2009, 5:07 AM
Post #1 of 4
(1860 views)
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2002 Fiat brakes get stuck on
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I live in China and have a 2002 Siena with 46,000 miles on it (75,000 km) - 1.5 liter 4 cyl. front wheel drive, 5-speed. The brakes begin to stick (staying on with varying degrees of slightness) once the temperature gets over 25 C (77 deg. F). At 30 degrees C (86 F). they get sticky enough so that the brakes get very hot (judged by touching the wheel rims) on just a 10 mile drive. Below 15 deg. C. (59 deg. F) they don't stick at all. I'm afraid I'm frying the brakes, but I'm waiting for the Fiat dealer to get a new brake pump, which they said is the problem. I'm skeptical about that though, because they don't seem very competent and seem over-eager to replace anything that has the slightest problem. The brakes don't stick at all if I just use the hand-brake while driving around, but once I use the brake pedal, they get progressively worse the longer I drive even if I stop using the pedal and just use the hand-brake again. Before I pay for a new brake pump (and they said probably they will want to change the ABS pump also), I want to find out if it could be anything else like a stuck valve or something I don't know exists. Both front brakes heat up evenly, and the back don't get hot at all. The Fiat dealer put new rotors and pads on the front, but the problem seemed exactly the same before and after that. I pulled out the ABS fuse for a while, but that didn't seem to change anything.
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Loren Champlain Sr
Veteran
/ Moderator
May 17, 2009, 2:51 PM
Post #2 of 4
(1850 views)
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Re: 2002 Fiat brakes get stuck on
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bjFiat; Check the brake fluid for contamination. Take some of the brake fluid from the master cylinder, mix it with water in a clear jar. The brake fluid should mix (water soluable). If there is a contaminate, it will seperate. Make sure that the master cylinder isn't OVER-FILLED. Brake fluid will expand with temperature. If the master cylinder is too full, it can cause the brakes to apply as it has no where to expand to. Have all of the brakes inspected. Adjust the rear brakes if applicable.
Loren
SW Washington
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bjFiat
New User
Apr 20, 2011, 7:30 AM
Post #3 of 4
(1745 views)
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Re: 2002 Fiat brakes get stuck on
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no contamination that i could find - master cylinder not over-filled. took it to a different mechanic and had the brake fluid flushed and replaced. then they said they would "adjust something". the problem never went away, but after that it was intermittent and not as severe.
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re-tired
Veteran
/ Moderator
Apr 20, 2011, 7:53 AM
Post #4 of 4
(1739 views)
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Re: 2002 Fiat brakes get stuck on
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Find out if mechanical or hydraulic problem . Jack up front and place on jackstands. Press and release brake pedal .Turn wheels and feel for drag . Loosen bleeder on affected wheel. If brake does not free up its mechanical ,maybe a sticking piston. If it frees up its hydraulic , most likely a bad flex hose.
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