Re: Cambelt gone - main dealer not much help
when the belt snaps the pistons will hit the vlauves, bending them, thats easy to fix, but when the pistons hit the valves there is the possiblity that there will be damage to the conrods, either bending them or causing play, and in some cases i've seen crankshaft bearings fail shortly after as well. the easy way to decide if the bottom end will need any work is to look at the piston faces, if there are indentation marks where the valve contact occured then it means the contact was hard and you are at risk of bottom end problems shortly after the head is repaired. what are the chances? its difficult to say, but you are more likley to have no bottom end problems at all, unless the belt snapped when at high rpm and under full load.
the prices you've been quoted are rediculous. you can get a whole engine for a few hundred pound (no more than £300 at a scrapyard) and get it fitted for a couple of hundred at an independant garage, although i would repair or replace the head and then hope for the best, chances are it will be fine, but if the bottom end starts knocking its time to sell it to a fool.