Brake Knock

[Cowtown Dave]

I just had new calipers, pads and one brake line replaced (left front) due to a fluid leak on my 65 conv. Now when I'm driving I hear a single knock when I step on the pedal. It only knocks once then stops but will knock everytime I hit the pedal and only happens when I'm driving? It seems to be coming from the left front or master cylinder area. Any ideas? :confused

 

[magicv8]

Look at the cross pins that hold the pads in place. If the pin falls out, the pads ride the hub and knock when used. If that's not it, while you are at it, make sure the wheel bearings are set right and check the caliper bolts and lug nuts are tight.