i've got a coolant leak at the rear of the engine coming out of the head. i took a mirror and looked, to me it looks like a threaded plug is supposed to go in the hole that the coolant is coming out of but its getting dark out so i just closed the hood and will check it out tomorrow. but was wondering what ya'll thought. it just looks like a small hole at the back of the head closer to passenger side. any ideas guys?

thanks for any help!

 

Freeze plug?

 

hope it isn't not a #53 block probably ok its a 02'