Glazed rotor 850

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juniper

I bought my 1997 Volvo 850 a couple of years ago. The brakes began
squealing within a couple of weeks. I took it in for a brake job to
the tune of $450, which worked for a couple of days. Now another
mechanic says the rotors are glazed, need to be turned, then if I put
new pads on, all will be well. Recently, they don't just squeal when
the brakes are applied, but often squeal (more softly) just driving
down the road. Any ideas on this?

Also, ALL FOUR of my front calipler pins came completely out. What's
that about? They would not let me drive it home from the shop where I
had it checked out, nothing was holding the brakes together but the
clips. Anyone ever heard of something like that?

TIA for your help.

Laurel
 
juniper said:
I bought my 1997 Volvo 850 a couple of years ago. The brakes began
squealing within a couple of weeks. I took it in for a brake job to
the tune of $450, which worked for a couple of days. Now another
mechanic says the rotors are glazed, need to be turned, then if I put
new pads on, all will be well. Recently, they don't just squeal when
the brakes are applied, but often squeal (more softly) just driving
down the road. Any ideas on this?

Also, ALL FOUR of my front calipler pins came completely out. What's
that about? They would not let me drive it home from the shop where I
had it checked out, nothing was holding the brakes together but the
clips. Anyone ever heard of something like that?

TIA for your help.

Laurel
Click to expand...
1st) the fact that the shop wants to turn the rotors should scare you
the thickness from new to replacement 26mm New min thickness 23mm min
thickness @ brake pad replacement is 23.8mm
2nd) as for all four caliper pins to come out is hard to believe as the
caliper is held in by 2 caliper slides that are bolts for all 4 to to
just come out & the fact that you were driving the car without the
calipers hitting the wheels are slim & none
If it was my car & I was not knowledge in automotive repair I would look
for another repair facility you can choose a very qualified independent
Volvo repair shop or your local Volvo dealer
Glenn
ASE Certified Automotive Technician
Volvo Master Technician

--
"*-344-*Never Forgotten"
Is for the New York City Firemen who lost their lives on September 11,2001.
The official count is 343, but there was also a volunteer who lost his life
aiding in the initial rescue efforts. And I will never forget them as
long as I live,
nor should any American.
 
1st) the fact that the shop wants to turn the rotors should scare you
the thickness from new to replacement 26mm New min thickness 23mm min
thickness @ brake pad replacement is 23.8mm
2nd) as for all four caliper pins to come out is hard to believe as the
caliper is held in by 2 caliper slides that are bolts for all 4 to to
just come out & the fact that you were driving the car without the
calipers hitting the wheels are slim & none
Click to expand...

This makes absolutely no sense at all, and may as well be written in
Sanskrit.

Please, if you want to be helpful, write it in a way that people can
understand.

Remember that this is an international group, and is read by many
people for whom English is not a first language. Punctuation is free;
if you use it we stand a chance of knowing what you say. Otherwise why
post at all?

--

TSH


For email, replace 'SpamOnlyToHere' with my initials
 
Stewart said:
This makes absolutely no sense at all, and may as well be written in
Sanskrit.

Please, if you want to be helpful, write it in a way that people can
understand.

Remember that this is an international group, and is read by many
people for whom English is not a first language. Punctuation is free;
if you use it we stand a chance of knowing what you say. Otherwise why
post at all?

--

TSH

For email, replace 'SpamOnlyToHere' with my initials
Click to expand...

I'm sorry, I disagree with you. Glenn is one of the most knowledgeable
posters here, and I've learned alot from him. If you don't like what or
how he posts, then you don't have to read his replies.

--
Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)
 
juniper said:
I bought my 1997 Volvo 850 a couple of years ago. The brakes began
squealing within a couple of weeks. I took it in for a brake job to
the tune of $450, which worked for a couple of days. Now another
mechanic says the rotors are glazed, need to be turned, then if I put
new pads on, all will be well. Recently, they don't just squeal when
the brakes are applied, but often squeal (more softly) just driving
down the road. Any ideas on this?
Click to expand...
Surely it's the pads that are glazed. I've never heard of glazed rotors.
Whether they need to be turned is a matter of thickness and flatness.
Also, ALL FOUR of my front calipler pins came completely out. What's
that about? They would not let me drive it home from the shop where I
had it checked out, nothing was holding the brakes together but the
clips. Anyone ever heard of something like that?
Click to expand...
That sounds extremely odd. I'd wonder if something was botched during
the brake job. How did the mechanic think it could have happened?
 
This makes absolutely no sense at all, and may as well be written in
Sanskrit.

Please, if you want to be helpful, write it in a way that people can
understand.

Remember that this is an international group, and is read by many
people for whom English is not a first language. Punctuation is free;
if you use it we stand a chance of knowing what you say. Otherwise why
post at all?
Click to expand...
Bit of a twist in the old knickers, eh mate?
 
[..]
This makes absolutely no sense at all, and may as well be written in
Sanskrit.
Click to expand...
Click to expand...
I'm sorry, I disagree with you. Glenn is one of the most knowledgeable
posters here, and I've learned alot from him. If you don't like what or
how he posts, then you don't have to read his replies.
Click to expand...

Ohgruffmutter. Yeah OK, bad day an'all. Sorry Glenn.

I don't normally comment about other people's posting styles (and to
be fair, it wasn't a comment about his knowledge), but the above piece
of bowdlerisation was outstanding.

I'm still struggling with what it means.
--

TSH


For email, replace 'SpamOnlyToHere' with my initials
 
Bit of a twist in the old knickers, eh mate?
Click to expand...

Look, I didn't get this email address for nothing, you know.
--

TSH


For email, replace 'SpamOnlyToHere' with my initials
 
L David Matheny said:
Surely it's the pads that are glazed. I've never heard of glazed rotors.
Click to expand...

FWIW, I was waiting in the company garage and saw they had just bought a
"glaze breaker" that showed it being applied to a brake rotor. The device
looked like a cup-type wire brush that fits in a drill but had some sort of
abrasive balls on the wires. What that is all about... your guess is as good
as mine. I'm not going to ask!

Mike
 
He thought they weren't tightened to spec. Although it was extremely
odd to him, too, and I think that is the only explanation he could
think of.

Regardless of Glenn's punctuation, his recommendation of finding a
competent tech came through loud and clear. (I hope its okay to
respond to several posts in one reply.)
 
rub your pre-moistened asshole all over the rotors and reattach.
Works for me!

Bai

AB
 
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