Fixing snapped cambelt damage!

[dai1983]

My Mother in laws inlet pully failed on her MK1 Megane causing the belt to come off and the timing to go out etc. we are considering her options which are: fix the engine, source a second hand one or buy an unknown but likely to be cheap car!

I've found complete head repair kits which include 16 valves, head bolts, seals, gaskets, cambelt, water pump etc for £50 - £100 less than a 2nd hand engine. I work as a mechanic (glorified fitter really) in a HGV/land rover workshop so have access to most of the equipment I'd need and there are some experienced blokes here. This type of work isn't day to day as we would just replace the engine on our vehicles so I have a few questions:

-valves will be bent and I know this. Replace all 16 while I'm in there or just the bent ones?
-I've not yet seen the car. The cam pulleys are keyless but is there likely to be damage to the camshaft itself?
-I know a decent machine shop so do I get them to recut the valve seats, don't bother or do it the manual way?
- is it likely other parts of the engine will be damaged? I guess the pistons could be marked?
-any thing else I should be aware of?

Thanks in advance as always,

Dai

[dai1983]

That's for the replies. She's considering her options at the mo but she isn't keen on buying a car with issues. Apart from this fault it has been pretty solid. There's also little corrosion of any on it even the underside. The choice would have been easier if it were completely rotten.

Talking of the valves:

-would I need a special valve spring compressor or would a normal one be ok?
-when lapping the vales and seats am I better off sending it to a machine shop or doing it myself? The old guys at work say that it's easy and about 5 mins per valve would be enough.