Aircon - High side / Low side ??
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Racer
Joined: Aug 2008
Posts: 371
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From: La Pallu, France
Aircon - High side / Low side ??
Hi guys,
Car is a 1986 Euro (RHD) Auto, with a Nippondenso 6E171 compressor.
Could someone please confirm for me which are the high and low side service ports.
I have one port in the large diameter aluminium pipe that runs from the compressor back towards the firewall and the expansion valve. I think this should be the low pressure port.
The other service port is on the top of the stem of the drier, I think this should be the high pressure port.
If someone could confirm that, I would be most grateful.
Thanks
Car is a 1986 Euro (RHD) Auto, with a Nippondenso 6E171 compressor.
Could someone please confirm for me which are the high and low side service ports.
I have one port in the large diameter aluminium pipe that runs from the compressor back towards the firewall and the expansion valve. I think this should be the low pressure port.
The other service port is on the top of the stem of the drier, I think this should be the high pressure port.
If someone could confirm that, I would be most grateful.
Thanks
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Yep, receiver drier is on high side. Location of low-side valve varies. Later it was positioned closer to the compressor in a tight spot behind the radiator and close to the upper radiator hose.
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From: Shawnee, KS, USA
I've got some gloves like this ("fireplace" or "hearth" gloves):
Maybe they're the same as welder's gloves; I'm not sure.
Anyway, I'll give them a try next time I need to mess with the low side, which, coincidentally, will probably be next week.
Unfortunately, the only other thing I've used these gloves for is clearing poison ivy.
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Chronic Tool Dropper
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Charge the system with the engine shut off and cold. Faster/easier/safer. Charge by weight with the recovery machine, or charge liquid to the high side port by warming the bottle slightly prior to charging. The method is detailed in the AC system tech instruction included on the Morehouse CD set if you have that.
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Charge the system with the engine shut off and cold. Faster/easier/safer. Charge by weight with the recovery machine, or charge liquid to the high side port by warming the bottle slightly prior to charging. The method is detailed in the AC system tech instruction included on the Morehouse CD set if you have that.
Chronic Tool Dropper
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The easiest way is to put it in hot water for a little while, or just leaving the bottle out in the sun for a while. It doesn't take much, just a few degrees over system temp to get the liquid flowing. Using this method, the liquid flashes to vapor in the AC system rather than in the bottle. That cools the system and doesn't take heat from the bottle, so once the flow is established you'll be able to continue without adding any more heat to the bottle. Using the conventional method, the liquid flashes to vapor in the bottle so it can be safely added to the suction side of a running system. The transition from liquid to vapor requires heat, so the freon bottle get cold as the vapor is drawn off. As it gets colder the pressure in the bottle drops, making the charging process slow down.
