[dpfarr]

When I went to rebuild my calipers and blow the pistons out of the calipers a couple wouldn’t come out. Most come out but a few don’t budge.

I have a couple thoughts.
1) hit them with a heat gun to help liberate them and then hit them with air.
2) a solvent to break down crud and old seals.
3) insert a rubber stopper I can compress with a nut and bolt and then apply some torque to liberate them.
4) breakdown the calipers via side bolts and some combination of #1&3