okay so one of the chain rails broke .chain jumped time and valves met pistons and voila! bent valves. common prob with this engine especially at this mileage.unusual though passenger side with damage.it is always the left or drivers side.because intake and both heads have to come off for repair and then aluminium block has to be helicoiled[steel head bolts in alu threads] your best way out of this is to find a salvage yard engine to replace yours.engine $ 1200 labor$ 1000 parts $700[so you can replace chain tensioner and rails before it goes in your car] call me if i can help further 214-9567007 david poole european performance dallas tx.