The Quad is not a good computer to own if you're at a newbie level of understanding with hardware as you are. You've chosen a high maintenance system and you have no idea how to maintain it. This is why research before buying is good.
It seems that a car analogy has helped you understand a basic part of it. I guess I just assumed that you knew that something called a "liquid cooling system" would have tubes with liquid in them.
You have honestly bought one of the most problem prone computers that Apple ever made. Best of luck!
My simple question as to what is considered routine maintenance of a G5 LCS led you to all this gifted insight.
In this one single post, which you couldn't resist, you have proven to me and many others just how absolutely wrong you are capable of being.
And while I'll admit to being 75 years old, those years, at least 40 of them were spent in a trade (industrial instrumentation) installing and maintaining industrial automation. This automation progressed over the years from purely analog to completely digital.
Put this together with the fact that my main hobby has been home computers ever since Radio Shack introduced the first TRS model 1, I would have to say that I do not think of myself as a complete computer noobie.
But above all, over all those years, one thing I learned early on and still holds true today is "if you are unsure of something, ask", which is what I did here, and not counting your two totally useless replies, I still managed to get the information I was seeking.
BTW, you'll not be seeing any more "thanks" from me.
Now how about you crawling back under your rock, and waiting there to ambush the next unsuspecting poster.
