I have a tick in my bottom end not sure if it’s a ring or a wrist pin. It doesn’t do it all the time it started about 3 days ago. One morning I’ll start it to go to work and it will tick. Hours latter I’ll start it to go home no tick. Then maybe an hour to hour and a half latter I can go start it up again and it will tick. The car runs fine Idles good at about 700 rpm. I have air pressure coming from the oil cap no sign of a blown head gasket. After the motor comes up to temp the tick will stop. It’s very frustrating trying to figure out what it is. So any input will help.