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Old 04-30-2018, 08:01 PM
97 SL320 97 SL320 is offline
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Join Date: Jan 2012
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Quote:
Originally Posted by Rooster300SD View Post
Getting ready to do this.
When you pressurize with the nitrogen does it matter which port
you hook it up to? Won't the pressure fall overnight do to the cold?

Thanks,
Jeff
As a matter of good practice, always introduce any gasses into the low side. If the compressor is running, trying to charge from the high side can result in a tank / can failure.

It is OK to vacuum the system from the high and low however.

The pressure will drop slightly as temps drop, but it will go back up as temps rise. Think about how tire pressures change due to temp and expect the same variation on the AC system.
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