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renault megane convertible not getting any compression?

hi I have an 03 Renault megane convertible and it wont start due to not getting any compression I have had the valves replaced but it still wont start any ideas as to what could be causing this as I have had no car for 3 weeks now and I feel like I am just throwing money at it and getting nowhere
ann, July 2015
Don't know who is doing the work for you but if there are no compressions on any cylinder then obviously there is a serious problem. You will need to go back and ask what was done when the head was off, was the head itself pressure tested,did it need skimmed,was the valve timing set up correctly when rebuilding,if all ok then I would guess the pistons would need to be removed for further investigations.

cdc, July 2015
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