Hi I have a cx 96 civic hatchback whihc has been stock since i bought it. The motor wont start but it will crank and turnover but it wont hold started. its like it doesnt have good compresson. It will You can hear the starter when turning the key and fuel after a moment and there is no cel. it will start for like half a sec and then go back to the cranking sound if you hold the key in place. The motor has 100,000 miles on it and its not leakin anything and the oil is full. So I am wondering if there is a usual problem with these motors around this mileage. COuld it be the head gasket or piston rings? And if so whats the usual charge for that kind of work