I'm trying to put together a motor and have found a hole in the block that I'm not quite sure what is supposed to lead to it. It is located just above the mounting holes for the AC compressor. It looks like it would likely have coolant passing through it, but it's not threaded and doesn't have a boss that I could clamp a hose onto or anything. Perhaps something press-fit it?

 

Goes to the PCV valve... Here's a pic of a car I'm working on right now.

I know I've mentioned this before, but you should really download the FSM for free from XenonS130 - S130 Reference It will answer these types of questions and you won't have to wait for someone here to answer.

 

Crank case ventilation tube goes in there.... or you could tap it and put a fitting on there...

 

NismoPick. Thanks for the helpful response, as always. You'll be proud to know that I did in fact look at the FSM, but I (mistakenly) believed the hole was for coolant flow. As such, when I looked and failed to find it in the cooling section, I decided to post up the question.

Okay, so now I know it's connected to the PCV valve: This motor will be going into our LeMons race car and I've tried to rip as many of the superfluous systems off the car as possible to help with at-track trouble shooting and repairs. I'm well aware that removing various smog items is not good from an environmental standpoint, but this is inherently true with racing $500 cars, regardless. So, I've erred on the side of trying to keep things as simple as possible in the engine bay. With this in mind, at least until I can get a replacement hose to put into the block, it would seem that I could simply plug the PCV valve and let the crankcase breath out of the hole. Yes?