The mechanic started exploring the head of the engine to find the cause of the problem with the valves making contact. Apparently the improper timing was causing poor combustion which resulted in over 2mm of soot building up on the top face of the piston. The valves were making contact with this soot and luckily not with the hard metal face of the piston. The timing is now fixed, and it seems like the valves are not bent. Getting into the head of the engine means that we need a new head gasket, but once that comes in tomorrow, everything should be fixed and just needs some reassembly. We’re hoping that it works and then we’ll update you all again.