Where is the a/c high pressure port on an 400E/E420?
 

Where is the a/c high pressure port on an 400E/E420?

Learn the basic diamond of a/c systems and you can find the low and high side port on any a/c system by simply following the flow of refrigerant.

Home plate is the compressor. First base is the condensor. Second base is the expansion device. Third base is the evaporator.

Everything between home plate and second base is high side while everything between second base and home plate is the low side.

Go to the compressor and start tracinf the lines. The small line from the compressor is the output (headed for first.) The large line to the compressor is the low side (coming from third.)

Use this basic diamond of a/c flow and you can identify any part in any a/c system.

Bingo, found it!

Looking at the A/C system as baseball diamond really makes it very simple.

I was having a hard time since the layout is a bit hard to track due to the lack of space under the hood. It turns out the high pressure port is located on the engine, underneath the plastic cladding.

Next, is to pick up a manifold gauge set.

Thanks!

Uh... not exactly sure what you are looking at but if its located on the "engine" I don't think you've found the answer.

The high pressure connection is located on the condenser, if you raise the hood its plainly visible between the right side fog lamp and the right side aux fan.

Hmm, just to be sure I'll post some photos of where I think it is, it'll be about a week though, I'm out of town at the moment.