How do I remove the crankcase cover on a 2006 Dodge Stratus SXT 6 cylinder 2.7L regular fuel engine? This is the cover protecting the timing chain and where the harmonic balancer is located. I have removed the harmonic balancer and all of the screws along the outside edge of the cover. An area of this cover extends out to the frame and is bolted to the frame with three bolts which I have also removed. It looks like this is made to help balance/secure the engine. There are two 13mm bolts left at the top of the cover. This is the same part of the plate that gets bolted to the frame. We broke 3 sockets and started to round the head on one of the bolts when we decided to stop. I can gently wedge a screwdriver between the bottom edge of the cover and the engine block but the top will not budge. I believe these last two bolts are the problem but I cannot break them loose. We tried turning the sockets CW and CCW (in case their reverse threaded). We even tried using a cheater bar on the end of the ratchet but this didn't help. The engine is still mounted in the car. My thought is is to find a 13mm 6 point 1/2" drive impact socket so I can use a 1/2" drive breaker bar. Any help is greatly appreciated.