Question about 1998 Buick Regal
This one took me 30 mins to find, its at the back of the engine at the center of the firewall (below the windshield ) . This is where the a/c lines go into the car ( evaporator) its hard to see if your tall . Remove the cap and attach your gauge . Good luck.
Posted on May 29, 2010
At the compressor, locate the 2 lines going into the compressor, follow the larger of the 2 lines until you find the low pressure port. They are often on the passenger side of the engine compartment.
Posted on Apr 25, 2010
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Posted on Jan 02, 2017
It should be near the compressor on the low side line. It is a huge pain to get to. Feel along the line, and you should come to the fitting.
Posted on Mar 06, 2009
SOURCE: Adding freon to air conditioner
If your system takes R-134 then the fittings for the high and low pressure are different sizes. You should only be able to fit the connector on the low pressure side.
Posted on May 09, 2009
It is on or near the reciever dryer or shiny looking thing at the right rear of the engine compartment. You need gauges to correctly add refigerant as you can overcharge it.
Posted on Jun 25, 2009
The ports on my 2005 silverado are on the same line,which is very confusing but, in between the two ports is the metering device (orifice) which changes the high pressure gas into a low pressure gas.The two ports are of a different size,with the low pressure being the smaller of the two. You can put your hand on the line, on each side of the metering device connection and the high side will be hot and the low side will be cold
Posted on Jul 18, 2009
First of all this car does not use Freon. It uses R-134a refrigerant.
Recharge through the a/c low side port, on the passenger side just in front of the firewall.
Frank's Friendly Cars Maui Car Rental
Posted on Aug 30, 2009
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