Changing brake fluid

That is not true. It doesn't leak, unless something is damaged.
Brake fluid is inside the caliper behind the seal. It doesn't leak past the seal unless the seal
and/or caliper wall are damaged or cracked.
The puck moves very little.

 

Not true. All rubber seals are wetted with a thin fluid film of lubricant for them to funcas designed. New caliper seals are assembled with a thin film of brake fluid.

Otherwise, heat will "glue" the lip of the seal to the metal piston.

It's like coating the rubber seal of the oil filter with a thin film of oil.

 

Or, when we're following the repair manual, with a bit of lithium-soap-thickened glycol grease.

 

I gather you didn't put the car in invalid mode? Have a look at brake fluid replacement link in my signature.

(on a phone turn it landscape to see signatures)

 

How did you bleed the rear brakes? Since they are electric?

 

Maybe mhdriver was just doing "fluid replacement" rather than "air bleeding"? You can sort of get away with those folk methods then.

We have circled back around to this thread's post #2.

 

You've done the official non-Techstream method as well then, for comparison? Doing that took me about an hour, excluding raising/lower the car, and removing/installing wheels. And it went smooth.

I'm a little incredulous, that dealerships, having full, legal techstream, would resort to what @ChapmanF calls "folk methods".

 

Believe it or not, dealer techs find ways to speed up their jobs. Especially since they are paid by the job and not by the hour. For example, a timing chain cover reseal is engine out by the book. It pays way more per hour if they do it in the car. Which means they get more jobs per day and make more money.

Price a standard maintenance brake bleed versus a replacement brake booster and stroke simulator bleed. Two quite different prices. You get the maintenance bleed every time unless you have done a diy brake booster swap and need help with the "replacement" booster bleed.

Vacuum bleeding is a one man fluid replacement method. It is not intended to bleed every brake booster internal passage as needed after parts replacement.

Dealer techs typically use the vacuum method for standard fluid replacement. Most will use a powered vacuum tool for speed and efficiency rather than a hand vacuum pump.

As noted, you don't want the brake booster pump to operate while attached to a vacuum canister. Some just keep the doors closed while its on the lift, others disconnect the negative battery terminal or they pull the fuse box 12v white cable.