[8695Beaters]

Whoa, whoa, whoa. Do not be afraid to use words my friend. It took a minute before I understood what you were asking. I never work on my own A/C (too toxic for my tastes, I can live without it), so I asked my dad. But I can say this: If the A/C is dry, then there's a good chance there's a leak in the system. Find the leak before you go ahead and refill the system. Otherwise you will just end up without A/C again.

So aftert talking to my pop for a minute, here's what you are looking at. Some time in the late 80s they changed to a formula of freon that is less toxic. The old stuff is R12, the new is R134. Here's where it gets confusing: The two gases have different boiling points so the compressors and the rest of the system can be very different. How different depends on the engine. So to cover the basics, you will need an A/C compressor that works with the R134, new lines (probably where the leak is), and whatever else I've forgotten. It's not a fun swap and if the system still has any gas in it, then you will have to get it evacuated (its illegal to do it on your own and the gas is very nasty stuff. You don't want to be breathing it in anyway). Unfortunately, most shops refuse to work on A/C that uses R12 because it is so toxic, so good luck on getting the last of the freon out. You can find a newer engine in a junkyard that uses R134 and swap all the parts into the other Civic.

Do you mean a D15B7? I've never heard of a B15. Since all the D-Series are all mostly the same, at least on the block side, then anything newer ought to bolt right in.