Manny,

Sorry to be so dense, but I don't quite understand. I get that I rotate the piston, but... 20 deg angle from what to what? From the marks? Which one? To what? To horizontal? To vertical?

Thanks!

__________________
Brian

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Sometimes the only choices you have left are bad ones.
Agent Broyles (Fringe)

PerkHouse,
Quoted directly from the book:
" Prior to pushing the piston into the caliper, position it so that its raised section will be positioned uppermost when the caliper is refitted.MB dealer use a special guage to ensure that the piston is correctly positioned.
The purpose of this procedure is to have the piston contact the pad, contacting the rotor at a slight angle, to reduce the possibility of brake squeal. "
The picture shows the caliper ( in a mounted position, with the raised portion of the piston starting at 9'o clock and, going clockwise, ending at the 4'o clock position ).
Make sense?

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2007 C 230 Sport.

Now that I've done it... yes, it does make sense. Thanks! I reconditioned my front right, but when I got to the front left (@ 10:30 last night) I realized it was not an ATE. I don't know if it's a Bendix or a Girling and I don't care, but it has a seized piston, so I've ordered a reman. I know, I know! I should replace both the fronts as a set, but I'm a beginning teacher (at almost 42) so the average salary for high school graduates in NC is higher than mine. (not much, but still...)


By the way, my rear calipers each had a seized piston, so I installed some Cardone remans last week. Cardone did NOT position the elevations correctly. In fact, 2 pistons were in random positions and the others were upside down. And one of the pistons they used, though it seems to be the correct size, was apparently not from an ATE caliper --or at least not from the same year-- because its elevation marks were about 180 degrees apart instead of about 240/120 degrees. The other thing is that one of the rubber dust caps on one caliper was deformed and pinched by the retaining ring and the other one had a small hole in it.

I wonder if Beck/Arnley pays attention to these little details more closely. It might have been worth the extra cash to not spend 30 minutes repositioning those 4 pistons. That and the fact that the non-rust finish was scratched in the process. (Don't these re-manufacturers do any research? Don't they wonder what those elevations are for???)

__________________
Brian

_________________________________
Sometimes the only choices you have left are bad ones.
Agent Broyles (Fringe)

I like yor sense of humor.
Don't you realize, the IQ of the average " Rebuilder " is somewhat less than room temperature ( measured in degrees Celsius ).
You're lucky the pistons were not installed backwards.

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2007 C 230 Sport.

First, my apologies for the long delay in getting back to this, my kids came home from school and dominated all my time.

I finally had a chance to check the alignment on the rear brake pistons. They were a bit rusty, so I cleaned them up before reassembling. Manny, does the alignment on the pistons look correct? Thanks again for the help,

Don

tn_IMG_1696x.JPG - Drivers side rear, in-board piston
tn_IMG_1698x.JPG - Drivers side rear, caliper about to be installed
tn_IMG_1699x.JPG - Drivers side rear, both pistons
tn_IMG_1706x.JPG - Passenger side rear, in-board piston
tn_IMG_1708x.JPG - Passenger side rear, both pistons

1999 C230 Kompressor

Attached Thumbnails

         

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2008 ML350
2007 Honda Element
2007 Honda Accord
2009 Honda Civic