My 2010 xfe with 100,700 miles ran hot and water started showing up in the oil. Pulled the head expecting a blown gasket but found small gaps between the cylinders where the block appeared to have busted and the pieces fell down. There were no signs of leaking around the gasket but it seems like just replacing the engine will be the best option. From what I've gathered, I'll need to find one from a 09-10 with vvt. I've found a few, lower mileage HHRs that are relatively close. Can anyone tell me if a 09-10 HHR engine will work or will I need to find another Cobalt? Thanks in advance for the help.