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Stop here! Let's talk about brakes

1867 messages,  Last post on Nov 26, 2009 at 6:20 PM

You are in the Maintenance & Repair Forum. Your Host is mr_shiftright

What is this discussion about? Brakes


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#1850 of 1867
Re: Brake Fluid Flush [jipster] by jeffyscott
Aug 14, 2009 (6:53 pm)
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Replying to: jipster (Aug 14, 2009 6:00 pm)

One of our cars (Mazda) lists brake fluid change every 2 years or 40,000 km on the schedule for Mexico but nothing on on the US schedule. I'm not sure what kind of magic changes occur when the brake fluid crosses that border.
#1851 of 1867
Re: Brake Fluid Flush [jipster] by bpeebles
Aug 14, 2009 (7:27 pm)
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Replying to: jipster (Aug 14, 2009 6:00 pm)

ALL hydrolic brake systems should have fluid completely replaced every 2-4 years (milage does not matter).... lest water droplets will form in the lowest parts the brake system and corrode calipers and ABS components... you have been warned.
 
Perhaps the manufacturers who do not recommend fluid-replacment are trying to drum up buisness... they surely know the brake-system will corrode from the inside out.
 
If you have hydrolic clutch... dont forget to replace that fluid too.
#1852 of 1867
Re: Brake Fluid Flush [bpeebles] by jeffyscott
Aug 15, 2009 (4:19 am)
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Replying to: bpeebles (Aug 14, 2009 7:27 pm)

Perhaps the manufacturers who do not recommend fluid-replacment are trying to drum up buisness
 
Assuming this is truly necessary, I would suspect it is more a matter of wanting to have the car appear to be nearly maintenance free. Strangest to me is, as I mentioned, to have the same owners manual specify that it should be changed in if the car is in Mexico, but not if it is in Texas, Florida, Puerto Rico, etc.
 
I've never seen an owners manual that specifies changing power steering fluid either, but doing that every once in a while is apparently not a bad idea either. Our newer cars do not specify changing transmission fluid either. One specifies no change to coolant and the other has 10 years/120k mi for the first change.
 
I plan to change brake fluid every 3 years, even if not specified and even though one car says 2 years. We are in a cold dry climate for at least 1/2 the year, so I figure if VW thinks 2 years is adequate for places like FL, then we should be okay with at least 3 years.
 
I'm planing to do this even though 12 years with no change (other than whatever got changed in normal brake jobs) did not seem to cause any significant problems with our 1997 vehicle. I did have to replace one ABS sensor, but the cost of that was probaly less than changing fluid regularly would have been. I did recently have the brake fluid changed on that old vehicle, anyway.
#1853 of 1867
Re: Brake Fluid Flush [jeffyscott] by 0patience
Aug 17, 2009 (3:53 pm)
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Replying to: jeffyscott (Aug 15, 2009 4:19 am)

I'm planing to do this even though 12 years with no change (other than whatever got changed in normal brake jobs) did not seem to cause any significant problems with our 1997 vehicle.
 
Don't confuse not having problems with the system working properly.
Preventive maintenance is just that. Preventing problems from happening.
#1854 of 1867
2 shools of thought... by bpeebles
Aug 17, 2009 (4:29 pm)
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I have been working in industry for many years... my Dad was an industrial engineer (trained in how to optomize machines)
 
There have always been 2 schools of thought.
1) Fix it when it breaks.
2) Preventive Maintenance (PM) to keep it from breaking in the 1st place.
 
In reality, if you were to look at a graph of the cost of each of these approaches, there is a mddle-ground where the cost crosses over on the graph. It is this crossover-point where you get the most service-life for the least cost.
 
Obviously this is theoritical and there are many other variables which the graph does not take into account. (Like how long before you will be getting rid of the machine.)
 
I have seen both approaches applied to automobiles, some people do NOTHING to PM their car and often get stranded out on the road with all kinds of problems. Other people spend more than they need to keep their car PMd... they very rarely have problems but end up having less money.
 
Each person needs to understand their situation and apply what best suits their needs.
#1855 of 1867
Help my brakes don't work! by jeanofarc
Aug 18, 2009 (6:40 pm)
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Replying to: kirstie_h (Nov 06, 2001 3:24 pm)

I left it sitting for about a year with moving and starting it a few times in that year. The pedal acts like there is no fluid. The fluid is still full and the master cylinder new and brakes are good, all changed a few thousand miles ago.
What could it be? Water? Air? The brake light goes on when going thru pedals. I thought that it was a wire shorting out after nothing happened as long as it was dry and the brakes were fine. Was this a warning?
Its a Mercedes truck body, disc brakes all around.
Write me at jeanofarcyahoo.com if you've got an answer, thanks. I'll check back here too.
 
#1856 of 1867
06 Outback 2.5 XT brake issues by ty311usvi
Nov 18, 2009 (10:09 am)
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I just recently had my front pads replaced and rotors tuned. About 2 weeks later i started getting a clicking sound up front. took it back in and he made some adustments, we were all good for a couple more weeks. then the sound began again. the sound doesnt start until i am braking and under 15 mph. took it back in and he replaced the pads again. again more noises but this time it had a little grind characteristic to it. took it back in AGAIN and he switched brands of pads. again a couple weeks later new noises, this time more of a creaky, squeaky sound. any ideas???
#1857 of 1867
Re: 06 Outback 2.5 XT brake issues [ty311usvi] by kiawah
Nov 18, 2009 (12:41 pm)
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Replying to: ty311usvi (Nov 18, 2009 10:09 am)

Keep taking it back until they get it right.
 
I'm assuming this isn't the dealership doing the repair, and they aren't using original equipment parts. They may have to go buy pads from the dealership.
#1858 of 1867
Re: 06 Outback 2.5 XT brake issues [kiawah] by ty311usvi
Nov 18, 2009 (1:00 pm)
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Replying to: kiawah (Nov 18, 2009 12:41 pm)

you have assumed correctly. could it be anything else besides the brakes or rotors?
#1859 of 1867
Re: 06 Outback 2.5 XT brake issues [ty311usvi] by autodock
Nov 18, 2009 (5:28 pm)
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Replying to: ty311usvi (Nov 18, 2009 1:00 pm)

Hi a quick question do you feel any brake pedal pulsation when hearing these noises if so you may want to suggest to the tech to check for debris that got into the valves in the antilock brake pump system we have seen this many times when the brake fluid is nasty and back flushing brake system will alot of times clear this up just a thought hope this helps Autodock

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