[Shop-talk] Squeaky brakes

[Al Fuller]

Eric:

 

Don't know if this helps but when I had my shop, we found that we could only
get proper performance on a Mercedes using genuine M-B parts.  The
combination of tight tolerances and strong patent protection meant any
aftermarket parts that would survive a patent challenge would be different
enough that they would only 'kinda-sorta' work.

 

If you can find out from the PO what went on the car, it might help going
forward.

 

Al Fuller

al at bighealey dot org

'65 BJ-8

'85 Rx-7

 

From: Shop-talk [mailto:shop-talk-bounces at autox.team.net] On Behalf Of
eric at megageek.com
Sent: Tuesday, May 16, 2017 2:29 PM
To: Shop-talk at autox.team.net
Subject: [Shop-talk] Squeaky brakes

 

OK, I'm at my wits end (it's true that was my STARTING point, but still) 

I bought a new (to me) 2007 Mercedes GL450.  It's in great shape, garage
kept and clean. 

After a week or so, the brakes make the typical squeal when applied lightly
after a longer trip. 
So I checked all the pads. They were almost brand new.  So I blew them out
with air (note, I didn't disassemble them at this time.) 
Another week so goes, squeal get worst.  Drives my crazy. 

Last night, I pulled apart each wheel, cleaned everything.  I added CRC
Anti-noise goo to the back of the pads, cleaned the caliper pins and applied
permatex caliper pin lube to them.  Finally, I placed a bit of never-seize
silver goo to the matting points of the pads and calipers (After wire
brushing the surfaces to clean them.) 

Blew everything clean and reassembled.  This morning, I got a little squeal
after my 50 min commute to work. 

WHAT CAN I DO NEXT?  I hate brake squeal, and it kills me when I do so much
work and don't get any real results.  What am I missing? 

Should I try to 'rough up' the pad surface? And if so, what is the best
method to do this? 

Thanks.

Sent from my Commodore 64 on a 2400 Baud Modem.
Tech Viper
"Be as beneficent as the sun or the sea, but if your rights as a rational
being are trenched on, die on the first inch of your territory." Ralph Waldo
Emerson 

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