Question about 1997 Volkswagen Jetta

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Which one is the low pressure valve? the one on the thinner pipe?

Which is the low pressure valve? the one on the thinner pipe or on the wider pipe?Mine is a Chevy Lumina ands I lost the coloured caps so I now cant remember which is the proper valve in order to add freon gas.

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If you have the 134 a conversion kit the fill adapter will only fit the low pressure side

Posted on Jun 27, 2009

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Posted on Jan 02, 2017

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3 Answers

Recharge Air Conditioning Chevrolet Traverse


it's straight below the high pressure valve about a foot. it's a little stem with a cap on it. it's kind of by the oil flter. i didn't see it the first time i looked either.

Mar 11, 2013 | 2010 Chevrolet Traverse

1 Answer

Where do I add freon to my '96 lumina?


You will add R134a refrigerant to the low pressure side. There willl be to schrader valves, one for the high, and low pressure sides. You can only charge the low side. To locate the inlet, you will follow the lines off of the a/c if you are not sure where they are, it will have a cap over the schrader valve that reads L, that is the one that you charge.

Mar 20, 2011 | 1996 Chevrolet Lumina Mini

1 Answer

Trying to recharge my A/C in chevy tahoe 2000 cant find the valve where i need to attach to.


The low pressure side port is located somewhere on the 'thicker' plumbing vs. the 'thinner' plumbing coming off of the compressor.

The pressure should be 25psi to 45 psi when the compressor is running.

You can't connect the low pressure hose with a can of r134a on the wrong side (high side vs. low side) because the ports are a different diameter (size).

It may be on the accumulator as well, the canister looking part of the a/c plumbing.

Aug 19, 2010 | 2000 Chevrolet Tahoe

1 Answer

When charging the a/c, which port is the low pressure? In a 1991 chevy lumina engine size 3.1?


The low pressure is the smaller in diameter pipe of the two.
Usually has a blue cap, some are black.

Aug 12, 2010 | Chevrolet Lumina Cars & Trucks

1 Answer

Need to fill air where is low pressure intake


The a/c has a low pressure port on the low pressure side of the a/c piping system.

One can identify the low side by looking at the 'thicker' pipes vs. the 'thinner' pipes on the high pressure side.

There may be a canister that has a low pressure port on it on the passenger side. Or else, it's on the thicker piping itself.

There may be a blue or black cap on the port.

The pressure should read 35psi to 45 psi on the low side when the a/c clutch is spinning or engaged.

When the a/c clutch is not spinning or engaged then the pressure should read 75 psi to 100 psi on a hot day.

Aug 06, 2010 | 1997 Pontiac Grand Am

1 Answer

I have a 2005 buick rainier i need to know where is the low pressure port where i can add freon at


Add freon on the low side port:

The low side port is located on the thicker piping vs. the thinner piping.
It may have a black or blue cap.
The hose, don't worry' won't fit anything but this quick connector,

Jun 23, 2010 | Cars & Trucks

2 Answers

Where is the low pressure access port for the air conditioner on a 1997 Chevy Lumina?


the heavier hose is the low pressure line
you will see a green cap on the port

Mar 07, 2010 | 1997 Chevrolet Lumina

2 Answers

1998 chevy lumina car. DTC code p0440. I know


You will need to drop the tank if you have a strong gas odor. Rubber line between sending unit and metal pipe is leaking.

Sep 21, 2009 | 1999 Chevrolet Lumina

1 Answer

How can I add freon to 1999 chev lumina


Get an a/c charging kit, it comes with a can of freon usually with a blue hose, and a small guage on it. The type is R134a.
Under the hood look for the a/c pipes, one has a red cap which is the high pressure, and the other has a blue cap,( that can be anywhere), that's the you need. Unscrew the cap, screw the blue hose on to the pipe, DO NOT TURN CAN UPSIDE DOWN. Start engine, turn on a/c full blast, open valve on can. Shake once in a while. When can is empty disconnect. If no other problems with system, there should be cool air coming out.

Jun 29, 2009 | 1999 Chevrolet Lumina

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