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Old 06-30-2011, 08:20 PM
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?low side AC service port

Need help determining which is the low side ac sevice port on my 04 jeep grand cherokee ltd. 4.7. Is it the big port or the little port farther back in the engine compartment and closer to the engine?
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Old 06-30-2011, 09:11 PM
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Re: ?low side AC service port

boy do I feel stupid. It's an 03 but I dont think it makes a bit of difference.
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Old 06-30-2011, 09:21 PM
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Re: ?low side AC service port

I would have to go out and look on my Jeep to determine if it's the big or small one (it's the same on every vehicle). But the line with the evap will be the low pressure side.
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Old 06-30-2011, 10:18 PM
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Re: ?low side AC service port

From the manual:

The high pressure service port is located on the liquid
line near the receiver/drier. The low pressure service
port is located on the suction line near the
evaporator at the rear of the engine compartment.
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Old 06-30-2011, 11:02 PM
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Re: ?low side AC service port

Generally the low pressure port is the larger one.
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