So one of my powersteering hoses(rubber) rubbed a hole through the low pressure return (the rubber/metal hose running over the engine) and I found myself replacing it (part 3540604). I replaced the hose no problem, reconnected the system. Only problem is I cannot find the high pressure port on the system.

The question is, was the system correctly upgraded by the previous owner, or did he just add the low pressure adaptor(12-134a)?

So what I need to know.

Where do I connect my manifold (high pressure). The low pressure connection is on the dryer, but there is only the one connection there. There is also some kind of plastic cover on another valve (i think it's a relief valve).

There are two ports on the back of the AC Compressor, but they are both the same size, shape, and thread. They will take a low pressure adaptor, but the high pressure side is diffrent, so this is not an option.

There is some kind of port on the Dryer to Condensor line, but I can't get anything that will mate with it (it's a female).

Can somebody help me out? Is there a good diagram of the 91 system out there? All I can find is 90-.

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85 240DL 189k; 91 240 169k; 98 S90 110k; 98 S70 160k