Strange Knocking

[FuntimePhil]

Any ideas guys? last week a started to hear a knock when i broke, originally i thought something was sliding forward in the car when i broke but i have ruled that out, windows open it is definitely coming from front passenger wheel. I took wheel off had a look around, nothing seems odd. Now if started to hear and feel a constant knocking when im driving, not as loud as the brake knock but a definite fast rhythmic knock when driving. Any ideas?

[steve2006]

Have you checked for play or roughness in the wheel bearing?

Also check the caliper slide pins the grease dries out and you end up with metal to metal contact which creates a knocking noise.

[FuntimePhil]

ok i took the wheel off, and took of caliper, the first caliper pin is fine, moves in and out easily and the rubber seal is in tack, the second pin in seazed in place and the seal is torn (assumed thats why its siezed), Reckon thats causing the knocking? I have tried with all my might for 2 hours to budge this pin with some heavy duty equiptment and its safe to say this pin aint moving! So if you reckon this is whats causing the issue i need to buy a new caliper holder? i dont want new pistons there fine, its just the bracket they fit on, can these easily be brought?

any advise would be great