Is the bolt I’ve circled in yellow the engine coolant drain bolt? It looks different from what the manual says is the engine drain bolt. I have a 2009.

 

Yes that's the correct bolt.
83Nm seems a lot though, don't think I torqued mine anywhere near that.

 

83nm is correct. 61LB-FT

Small amount of hondabond on the threads and new crush washer.

 

If you drain the radiator completely, very little will come out of that hole.

That hole is also used to install an engine block heater. It’s an OEM part, that allows you to plug the car in and keep it warm. Very useful in extreme cold.

 

If you remove the bolt, maybe 1/3 Quart or Liter came out. Maybe! Is this worth the hassle?
83 NM is correct. It seems to me that Honda allways gives high torque specs compared to the Suzukis and Kawasakis i worked on, but so far never had a problem. *Knock on Wood*

 

just drain the radiator, dont even bother with the block drain

 

exactly- if one is really pedantic, take your shop air and blow it into the rad to force some air into the system while draining.

darcy

 

What size is the crush washer?

 

This is what Google said about a similar bolt on a Civic. Compare the bolt dimensions. It may be the same washer.

If not, you can always sand down the lip scars from the previous torque-down, and it'll prolly be okay for one more use.

 

I drained the original green coolant from my '03 (just hit 10k miles) and filled it back with distilled water. I want to get every bit of the green out before I put the blue coolant in. I then turned the car on to burp the air out at the radiator. Shortly after the car warmed up, the water in the radiator fluid funnel turned green. It wasn't as green as the original coolant was, but I'm surprised at how green it was. There was definitely a good amount of coolant that didn't drain. So, I have to repeat the process. If I can get 1/3 quart out of the block, it will be worth it. I have a lift, so it's easy to get to.