Can anyone check whether brake pistons move freely?

Stuart A. Bronstein wrote:
> How does a DIY check that brake caliper & pistons move freely.
>
> In a related thread on how to diagnose high speed braking induced wheel
> shimmy in a 98 Toyota 4Runner and in a variety of brake shimmy articles it
> was suggested I check that the 4 pistons move freely in each caliper.
>
> ... (eg http://www.eurac-group.com/technote4.htm
> http://journals.pepublishing.com/ind...68739575J1.pdf
> http://www.babcox.com/editorial/bf/bf100326.htm
> http://www.estech.co.jp/list.pdf/%20customer/cust41.pdf etc) ...
>
> Unfortunately, neither the $20 Chilton nor the $200 Toyota Repair Manuals I
> bought say ANYTHING about how to check the pistons & calipers for free
> movement.
>
> Each caliper has 4 pistons (which the Toyota shop manual says to separate
> with a MONKEY WRENCH!).
>
> Do you know how to check that the caliper & 4 pistons move freely?

You have asked essentially the same question in several messages on
several forums over the past week. Most backyard mechanics can slap in
a new set of pads and hope for the best, but it seems you have other
problems with the brakes that will take someone with the tools and
skills to correctly diagnose and correct. I would strongly suggest
that you take the car in to a good garage or Toyota dealer for an
evaluation and repair.