I changed a 93 ford calipers and they are leaking

In my opinion they definitely should have checked them the first time. Some freezer plugs aren't that difficult to change. I have also seen people just slap some high temp sealant on them to repair the holes. More commonly they just rust out and they probably should have seen that when they were looking for licks the first time.

I doubt the leak is from the bolt, it will be from where the flexible hose screw into the caliper or from the hose itself. The caliper can (unless it's cracked!) only leak from where the fluid goes in and around the piston seal.

I hope I have been of help but please do not hesitate to ask if you have any further questions.
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I would suggest changeing the radiator the radiator sealant is just a temporary fix

sealant is not stuff i would say it will hold forever if it does take hold i would say replace radiator

IF O - RING STILL LEAKING YOU COULD OVER TIGHTEN CRACKED IT.NOW FORD V6 USES THERMOSTAT GASKET WHERE YOU PUT RTV SEALANT ON BOTH SIDES.BUT IF USING O - RING IT SHOULDNT LEAK NONE.THE DRAIN PLUG NEEDS NEW O RING.BECAUSE IT CAN BE SCREWED ALL THE WAY OUT REPLACED. IF DRAIN PLUG DONT HAVE O - RING YOU CAN USE THE PLUMBERS WHITE TEFLON TAPE TO SEAL THREADS FROM LEAKING COOLANT.

Have a look at the power steering fluid cooler it is just in front of the radiator behind the front bumper. The coolers corrode and leak. Also the seals can go, check for fluid leaking out of the boots at the track rods. Try this procedure :--- 1)Trace the source of the leak. Use a mirror on an extended handle to follow the puddle of fluid on your garage floor to the power steering system. Look on the hoses and gaskets to find from where the fluid could be leaking. 2) Add power steering stop leak additive to your power steering fluid. Lucas Power Steering Stop Additive is 100 percent guaranteed to stop seal leaks. In older cars, the seals shrink, causing leaks. The stop leak makes the seals swell to their original size. 3) Use gasket sealant if the gaskets are old and leaking. Sealant, such as Permatex, is resistant to engine fluids, and will help repair a leaky gasket. 4) Replace the gasket, if the gasket sealant does not work. Thanks. you can rate this solution and show your appreciation.

have the crankcase pressure tested.the turbo is intercooled.if there is a cooler leak,it could be pressurising the crankcase causing a leak.make sur the cap is torqued to spec.the other solution is to use rtv sealant.it will still come off when needed.

Purchase some Permatex clear RTV silicone adhesive sealant from an autoparts store run a bead around the window where you have a leak; smooth the sealant like you would caulk wait 24 hours before use

try warming up the engine a little then re-tightening the bolts,if that doesnt work,mark where its leaking and pull the pan back off and apply sealant to that area a little heavier than the rest of the gasket surface,dont use too much on a new gasket,just a really thin coat...USE "ULTRA BLUE" sealant,NOT blue or black RTV silicone,silicone wears out and it can leak after a while..Allow the ultra blue sealant to dry for about 30 minutes before re-assembling it,and clean off all oil from the gasket before applying the sealant,its ok to apply it to both sides of the gasket,and add a glob to all 4 corners where the gasket meets with rubber seals around the crankshaft,but put those globs on right before you put the pan back in place,the sealant has to be wet to squish in enough..i hope this helps