pug 306 rad/water prob or maybe head gasket?

hi i had a bit of a prang and so i took the bumper, metal plate that
the lights sit in to replace as it was dented and also the radiator
off to nock a little dent out it wasnt over heating or anything after
the crash but since i took the rad off and put it back on the water
isnt circulating and i have tried like mad to bleed it but the water
still wont come thru im unsure what it could be anyone got any ideas,
its a 306 1.6LX 97 R Reg please help

 

It is called AIR in the system start the engine up with a hose pipe in
the top of the rad, that always work(well it dos when i do it )

 

not to knock a dent out of radiator but the body had to move it to
reach properly just incase u ask thought id just mention cause i
kinda wrote that bit wrong in a hurry

 

As Chris says, you still have air in the system. The problem is that the
filler on the rad is lower than parts of the engine. Either use a hose as he
says, or make up a funnel out of an old antifreeze bottle neck and use that
stuffed into the filler to allow you to overfill to a higher level. Then
undo the bleed caps to allow the air out.