Over heating, coolant bubbling when turned off

[Mick89]

Bubbling has been happening for about a week, finally overheated. Started to replace thermostat but one of the bolt holes is stripped. Going to buy a tap and die set and try that out for the first time (kinda nervous) Hoping it ends up being the thermostat but would like some thoughts on it please! Also engine ticks consistently. Thanks!

 

[shucker1]

Engine type?

Number of miles?

Anything else unusual?

More Data helps.

 

[Mick89]

Engine type?

Number of miles?175k

Anything else unusual? Just bought it about 3 weeks ago so dont really know the history

More Data helps.

 

[Mick89]

All i know is its a 6 cylinder.. ..lol dont know much about vehicles sorry

 

[Mick89]

When my husband took off the thermostat, it was stuck open. Thought that was weird. Any thoughts?