Toyota Caldina cambelt broke. Valve damage?

If the timing belt snaps, they run into each other, causing bent valves (most common), cylinder head or camshaft damage, and possibly piston and cylinder wall damage. ... In a non-interference engine, the pistons and valves don't occupy the same space, so if the timing belt snaps, no valve or cylinder damage occurs.
nissan are all Interference engines

Did they replace the valve springs? check your timing.

DO NOT ATTEMPT TO TURN THE CAR OVER, KEEP IT OUT OF GEAR SO THAT THE CRANKSHAFT DOES NOT GET ROTATIONAL FORCE OTHERWISE IT COULD CAUSE SERIOUS DAMAGE.You need the services of a mechanic/technician as soon as possible, if we are talking about the cambelt , the engine might be an interference engine which means that times in the engines rotational cycle the pistons and valves overlap. The cambelt, (if that is what you mean by the vbelt,) ensures that the valves are up , away from the piston when it is on the up stroke. It sounds as though your engine might have sustained some damage but this might just be some bent valve heads which can be resolved by replacing valves. Hopefully there is no more damage than this. You really need to find a decent diesel qualified engineer.

Good Luck

When the timing belt broke the valves got hit
Sloppy work on the part of the shop
They never checked for valve damage

Probably not. The valves will be bent requiring a head job and a visual inspection will reveal any damage to the piston tops. This would be unusual as the valve stems bend very easily.

If you broke a cam belt then you have serious damage in the head. the cam shaft holds several valves open at various stages of the cycle and they are hit by the pistons as the engine turns over resulting in bent valve stems. No easy cheap fix as the head has to come off to replace the valves.Best you find a qualified reliable mechanic to do the job and it will cost

if it is diesel and you have black smoke you need fuel injectors either serviced or replaced also you must check the engine valves clearance. If your smoke is blue white smelling unburned fuel renew injectors.If it is blue white smelling oil and diesel then you will have piston rings and valve steam seals.

my books show it as a interference engine in which case valve damage is most likely to occur
however if that was the case , it would be having a miss from the start and would not run 2 weeks before something happened
if a valve spring breaks there could be valve piston contact but it is doubtful if that would destroy the engine but again breaking valve springs is rather rare on diesel engines
the engine would not just quit but would rattle and bang it's head off then develope a big noisy miss from a hole in the piston
so I suspect a timing belt problem from when they removed/replaced the head after the glo-plug fix or a crank/cam shaft position sensor or wires ( possible faulty connections for the cam shaft)
I would suggest finding an accredited service center for a proper diagnosis and quote for engine repairs

There will be if the camshafts jumped timing. Check the marks on your camshaft and see if they are relatively close, usually if they are two teeth or more apart then engine damage has occured, however even if it jumped more there is still a chance that the engine was not damaged.

The one in the wife's car slipped due to the front idler pulley falling apart and bent numerous valves both inlet and exhaust. A broken timing belt will give the same result.....An expensive exercise to fix. Tony