I have an 03 f250 6.0. I brought it to a mechanic to get my oil cooler replaced. The coolant temp usually stays about 188 and the oil just keeps getting hotter the longer it is driven. I have been loosing coolant from the degas cap. The EGR is already deleted. He opened the hood, looked at the degas bottle and told me my head bolts are stretched and I need head gaskets and studs. Is there any other way to make sure the bolts are stretched other than looking at the degas bottle?