I have 2003 pt with 110,000 miles. Yesterday it over heated and had it towed home. I've had to add antifreeze a couple of times to help it out. Does anybody think this could be a thermostat.

Bubbles in the coolant are a symptom of a blown head gasket and it will cause overheating. Have the compression checked to confirm.

Is the motor locked up, yet?

No motor isn't locked, But i get what your saying. If anyone could give me a parts list on what i need to replace as I'm on fixed budget, It would be very helpful. Thanks James

All the pieces are there...block ain't cracked, heads are apparently not warped...it's tinkertoy time...tell them to hold your calls, you're busy.