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Not too sure but they may have disturbed the evaporative emission purge valve hose where it crosses the front of the engine right hand side of engine compartment. On the blue smoke they might have cracked a breather hose that connects to the crankcase vent on the driver side valve cover. Just have a look for any oil leaking from the accordion hoses at throttle body and at the valve on the valve cover. Pretty sure you will get a check engine light soon which may help diagnose the smell as well.
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