Daniel owns this 2002 WRX which was having some miss fires. He brought it in to AJW Performance for some diagnostic work.
We changed the spark plugshttps://ajwperformanceproductsblog.com did a compression checkhttps://ajwperformanceproductsblog.com coil packs and a few other tests and confirmed that cylinder #4 had something seriously wrong. After removing the head we found one of the valves had a significant piece missinghttps://ajwperformanceproductsblog.com so it was time for some head work. While the motor was pulled we decided to do the other head gasket. We discovered that the head had several cracks in ithttps://ajwperformanceproductsblog.com so this was taken care of as well of course.
OEM head gaskets