i found where the civic was pissing coolant from, it's the back of the thermostat casing. It in between the housing and a metal pipe so I'm guessing it's just a bad O-ring? And what exactly is this metal pipe for? A connection pipe for the waterpump to thermostat? And do I need to take the thermostat housing to get to the O ring? Couldn't find any any info on this pipe and how to get to that O-ring so any info would be great. Thanks

Looks like the upper pipe (11) can be unbolted (25) then you may get it pulled out far enough to slip a new O ring on..... or you may need to get it loose from the hose (10) to get enough room.. I don't know, it's not like that is something I replace every day.
Play it by ear, whatever it takes. The connection with the O ring will probably be pretty tight fit, may need a bit of prying to get them apart.

Awesome! thanks man I couldn't find any damn diagram that had the pipe on there thanks again!

Can u pls send me that link to that diagram I found that I was missing bolt 25 that caused the upper pipe 11 to fall out just enough to splay coolant.

Pic came from estore.honda.com,

the bolt should just be a simple 6x1.0 thread, 10-15mm long should work, available just about anyplace that has metric hardware for sale....or a mechanics leftover nut and bolt stash.

Missing....so someone had it apart and forgot to install that bolt, and threw it in the leftover stash bucket, or thought it wasn't important, or..? Head gasket job was done and this is the result?

Awesome thanks man and Yep hahah the head gasket was replaced. sick of people half assing stuff. The more I look the more bolts I find missing. Like for example the air filter had not one bolt in it. I found that out when I heard the thing jumping around under the hood lol

So how much IMPORTANT stuff was completely ignored? Why bother to use a torque wrench on the head bolts?
I've said it before, the wrong person with a pair of pliers can ruin an entire car in a matter of minutes.

do you happen to have a link or part number for that o ring?

if you're talking about #21 on the diagram, it's part number 91314-634-000
https://www.hondaautomotiveparts.com...bC1sNC1nYXM%3D

If you're talking about #6 on the diagram, its 19305-PLC-A00
https://www.hondaautomotiveparts.com...w0LWdhcw%3D%3D

thank you soo much