A good reason to do your own mechanical work
02-27-2006, 10:11 PM
#1
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A good reason to do your own mechanical work
Okay, so last December my car passsed a PPI with flying colours.
Last May I took it in for a full service and requested a change of brake lines as I could find no record they had ever been changed. The mechanic did not do it as he said "they looked fine - no reason to change them."
I am in the process of installing new brakes lines myself and here is what I found at the front passenger side yesterday after removing the spiral line protector...
I guess it is time they were changed!
Marc
p.s. moisture is Liquid-Wrench as the brakeline connection is frozen.
Last May I took it in for a full service and requested a change of brake lines as I could find no record they had ever been changed. The mechanic did not do it as he said "they looked fine - no reason to change them."
I am in the process of installing new brakes lines myself and here is what I found at the front passenger side yesterday after removing the spiral line protector...
I guess it is time they were changed!
Marc
p.s. moisture is Liquid-Wrench as the brakeline connection is frozen.
02-27-2006, 11:32 PM
#3
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The general guideline is 10+ years on rubber brake hoses. Everyone with a 964 should either know when their lines were last changed, or follow Marc's lead and change theirs. Marc caught a bubble on his....another failure mode is internal swelling which can affect the hydraulic operation.
02-28-2006, 01:06 AM
#4
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Originally Posted by Bill Gregory
The general guideline is 10+ years on rubber brake hoses.
02-28-2006, 02:02 AM
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Originally Posted by Sumday
The C4 guys would have to get access to a Hammer to bleed the brakes right?
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02-28-2006, 04:09 AM
#8
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Originally Posted by Bill Gregory
The general guideline is 10+ years on rubber brake hoses. Everyone with a 964 should either know when their lines were last changed, or follow Marc's lead and change theirs. Marc caught a bubble on his....another failure mode is internal swelling which can affect the hydraulic operation.
Hey Bill...
Thanks for the conformation on an upgrade that was completed several weeks ago... It’s one of the reassurances that I’ve added to my "DONE" list... Thanks for your enthusiasm!!..
Hey Marc...
As usual great photography... Thanks for spelling out one of the many possible Porsche 911/964 failures that is prone to every car at a certain age... And it does not stop there. The "STILL TO DO" list is very long... Thanks for your enthusiasm!!..
From here,
Marc...
02-28-2006, 03:54 PM
#10
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I blew thru a red light with my 230SL mercedes coming off a Interstate ramp a few years ago when a front rubber brake hose split! luckly it was late at night and no cars were coming. Thank goodness for a mechanical emergency brake!! Not a experience you ever want to repeat.
02-28-2006, 08:38 PM
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Originally Posted by Marc Shaw
Okay, so last December my car passsed a PPI with flying colours.
Last May I took it in for a full service and requested a change of brake lines as I could find no record they had ever been changed. The mechanic did not do it as he said "they looked fine - no reason to change them."
I am in the process of installing new brakes lines myself and here is what I found at the front passenger side yesterday after removing the spiral line protector...
I guess it is time they were changed!
Marc
p.s. moisture is Liquid-Wrench as the brakeline connection is frozen.
Last May I took it in for a full service and requested a change of brake lines as I could find no record they had ever been changed. The mechanic did not do it as he said "they looked fine - no reason to change them."
I am in the process of installing new brakes lines myself and here is what I found at the front passenger side yesterday after removing the spiral line protector...
I guess it is time they were changed!
Marc
p.s. moisture is Liquid-Wrench as the brakeline connection is frozen.
02-28-2006, 08:41 PM
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OK Marc, you just cost me another $70 and an additional week's wait for the new SS lines. 
I'm in the middle of installing HR springs/Billsteins... fronts are done - except for the lines.
You convinced me I should do the lines at the same time... Thanks!
I'm in the middle of installing HR springs/Billsteins... fronts are done - except for the lines.
You convinced me I should do the lines at the same time... Thanks!
02-28-2006, 08:50 PM
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Originally Posted by Marc Shaw
Last May I took it in for a full service and requested a change of brake lines as I could find no record they had ever been changed. The mechanic did not do it as he said "they looked fine - no reason to change them."
Not that i am fond of my mechanic myself...but what are the chances that the bubble appeared between last may and now (8 months)
by the way, how those bubble appeared? is it a long growing process or, after years of fatigue, "one day" the rubber gives in, you just end up with a bubble?
Any Ph D in rubber Fatigue outhere
?i agree though that you better DIY that having to double check everything... Problem is i am a bit of a virgin in DIY...
02-28-2006, 09:58 PM
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Originally Posted by jeffnudd
That should of been picked up on the service, lucky you picked that up really.
Originally Posted by 92964cab
OK Marc, you just cost me another $70 and an additional week's wait for the new SS lines.
I'm in the middle of installing HR springs/Billsteins... fronts are done - except for the lines.
You convinced me I should do the lines at the same time... Thanks!
I'm in the middle of installing HR springs/Billsteins... fronts are done - except for the lines.
You convinced me I should do the lines at the same time... Thanks!
Originally Posted by bzh on the loose
Not that i am fond of my mechanic myself...but what are the chances that the bubble appeared between last may and now (8 months)
Originally Posted by bzh on the loose
Problem is i am a bit of a virgin in DIY...
).Marc
02-28-2006, 10:21 PM
#15
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The hose that holds the pressure is inside , its not the outer cover that is holding the fluid in . The inner "real" hose or the connection between the real hose and the metal connector might be haven just a small small leak . It looks like your bubble is between the real hose and the outer cover .
"is it a long growing process"
On an auto , its good till the day it goes bad . The first day it starts to leak , its bad , even if the hose will hold together if you keep useing it , you will never know when its small small leak is going to be a big big leak . Nothing sucks as much as no brakes at speed .
On an airplane it would have been replaced long ago , maybe a few times already .
"OK Marc, you just cost me another $70 and an additional week's wait for the new SS lines."
On the other side , he might have just saved you thousands in body work .
"is it a long growing process"
On an auto , its good till the day it goes bad . The first day it starts to leak , its bad , even if the hose will hold together if you keep useing it , you will never know when its small small leak is going to be a big big leak . Nothing sucks as much as no brakes at speed .
On an airplane it would have been replaced long ago , maybe a few times already .
"OK Marc, you just cost me another $70 and an additional week's wait for the new SS lines."
On the other side , he might have just saved you thousands in body work .
