A/C Line Plumbing Questions Options

[Coomer]

Right now I'm working on trying to get my A/C to work in my car, and I've got a couple questions.

1. There's the large silver line that goes into the firewall and hooks up to the A/C compressor. Then there's the silver line that goes into the firewall and hooks up to the A/C condensor(I think that's the name of it...it's the radiator-looking thing) and finally hooks up to the A/C compressor. My question is, which line goes to which part of the compressor?

Here's a picture to illustrate this:

The circled things are the places where lines can attach.

2. On my spare 4A-GE, the lines are still attached to the compressor, but they're cut. However, they've got these big metal things, pictured below. What do these things do? I know that my '95 ST doesn't have these. And do I need them? I planned on using my ST lines on my car.

Pictures:

There's the 4A-GE compressor.


For comparison purposes, here's the 7A-FE compressor.

Attached image(s)

 

[Kwanza26]

There are basically two lines... one suction and one discharge. The discharge is the one that goes into the condensor and the suction goes into the firewall (evaporator). To figure out which line goes where, umm, the suction line usually has a small nipple (low pressure fitting) on it. This is usually where the A/C is recharged. The discharge line has a larger nipple on it. I can't say which port on the compressor is which, but typically speaking, they only fit one way and Toyota tends to recycle compressor designs, so the suction and discharge ports should be in the same place between the 4AGE and 7AFE.

For your second question... not sure exactly what those little chamber things do, but I would guess it may be an older R12 system and runs different line pressure or something. Those things may be there to reduce line pressure... but that's only a guess... ;]