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eyob07
User
Sep 22, 2014, 5:59 PM
Post #1 of 5
(2396 views)
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Hi guys I,m not repeating the same question this is my friends 2002 sienna the front brakes are dragging, we tried to isolate the culprit, with the little experience we have, we replace the calipers and the flex hoses, the problem is till there, this might sound stupid our next move is to replace the muster cylinder, please lend us your ideas,
God bless you all.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 22, 2014, 6:31 PM
Post #2 of 5
(2382 views)
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Before you replace the master, crack the lines loose at the master and see if that releases the brakes. If it does, then change the master. If it doesn't, there is no point in changing it.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Sep 23, 2014, 4:23 AM
Post #3 of 5
(2369 views)
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Another suggestion is to unbolt the master from the brake booster before you crack the lines. If the brakes release when the master is unbolted from the booster, you could have a booster issue. It is rare, but I have seen it on two Toyotas already.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Sep 23, 2014, 6:36 AM
Post #4 of 5
(2362 views)
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Either way I find it rare for a master cylinder to change on its own that was once fine. If brake feel has little free play up top the fluid will not return to master as it should when pedal is released. Just heat alone if fine cold then locks either just temp of the day or use of brakes at all expands brake fluid and without touching brakes they begin to apply themselves. VERY RARE and usually a defective replacement master if that is the case.
Fought with one but know failed master was replaced and fine till even engine warmed up or any use of brakes. By the time you go check a dang thing it's cool/cold and brake already not stuck in that case just once and proven a defect of a new part by one maker and whole line of parts had the fault - rare as said,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 23, 2014, 10:50 AM
Post #5 of 5
(2355 views)
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It's not rare at all if somebody contaminated the fluid.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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