wanner

I just recently did a pad slap on the front calipers and did not open up the bleeder valve when i compressed the piston. The abs light has not come on the explorer is a 02 and had 55000 miles on it and it was the first brake job it has had. Does anyone know the chances that i caused some serious damage.
thank you

classicthunder

If you have a good pedal it'll be fine.On some cars especially older ones it can damage the master cylinder resulting in spongy or no pedal at all.

FrdTek05

You should be okay. I've been doing brakes for better than ten years now on a regular, professional basis. I've never had a problem with ruining a master cylinder. I rarely open the bleeder screw when I compress the pistons even though I know there is a possibility of that happening. It hasn't happened so I've sort of passed it off as an old wives tale. I do however remove some fluid from the M/C reservoir before doing a brake job, just because I know for a fact I don't feel like washing off the firewall when I'm done. Brake fluid=bad for paint.