Search found 269 matches

by Al9
Sun Dec 13, 2020 1:54 am
Forum: Automotive Air Conditioning Forum
Topic: 2002 Pontiac Ram Air Trans Am ac is not cooling properly
Replies: 84
Views: 23534

Re: 2002 Pontiac Ram Air Trans Am ac is not cooling properly

Great news. A few tips for the best results possible: 1)When adding oil to the compressor, adding it through the oil drain hole and not through the suction port is critical to ensure proper lubrication. 2)Adding the required amount of oil to the accumulator is equally critical. 3)Rotating the clutch...
by Al9
Tue Dec 08, 2020 4:25 am
Forum: Automotive Air Conditioning Forum
Topic: Cooling issues over time
Replies: 14
Views: 3394

Re: Cooling issues over time

Really strange that the suction would get so low as to trip the suction side pressure switch (if car comes with at least one, that is) only after 10 minutes and not immediately. I once had an issue with my car's AC where the compressor started getting noisy only once the thermostat opened and the en...
by Al9
Mon Dec 07, 2020 3:59 pm
Forum: Automotive Air Conditioning Forum
Topic: Cooling issues over time
Replies: 14
Views: 3394

Re: Cooling issues over time

To me, the intermittent clutch cycling off (for too long to be considered normal operation of a cycling clutch orifice tube system) thing sounds like a compressor discharge anti-overheat temp switch tripping, possibly due to a faulty switch or a serious refrigerant charge issue. These switches are p...
by Al9
Mon Nov 30, 2020 4:49 am
Forum: Automotive Air Conditioning Forum
Topic: Whatever happened to that ultra-cold Ford truck?
Replies: 5
Views: 1468

Re: Whatever happened to that ultra-cold Ford truck?

I think these calculations are meant for a 100% fresh air condition. Such a cold evap could still function properly out in the desert where things get really dry. However, AC has to work nearly about everywhere (except sub-freezing ambient), and that's one reason as for why most block style TXVs are...
by Al9
Fri Nov 13, 2020 4:24 am
Forum: Automotive Air Conditioning Forum
Topic: Expansion valve
Replies: 10
Views: 3352

Re: Expansion valve

Your best bet on finding one is the second hand market. Trying to source a brand new one for such an old vehicle will likely yield poorly assembled, and who knows what's inside the power head (=how much oil it returns to the compressor in critical operating conditions), Chinese garbage.
by Al9
Sun Nov 01, 2020 6:34 am
Forum: Automotive Air Conditioning Forum
Topic: gauge readings
Replies: 21
Views: 6196

Re: gauge readings

You never mentioned a vacuum, and leaving air in the system causes serious issues.
by Al9
Tue Oct 20, 2020 1:38 am
Forum: Automotive Air Conditioning Forum
Topic: Volvo V50 2011 very high vibrating highside pressure
Replies: 3
Views: 1179

Re: Volvo V50 2011 very high vibrating highside pressure

A severe oil overcharge can make the condenser completely useless (internally coated/pooled with excess oil to the point of being unable to exchange any heat). Still, checking if the orifice tube looks dirty is a great way to check for compressor wear (abuse creates serious wear), keeping in mind th...
by Al9
Mon Oct 19, 2020 8:41 am
Forum: Automotive Air Conditioning Forum
Topic: Volvo V50 2011 very high vibrating highside pressure
Replies: 3
Views: 1179

Re: Volvo V50 2011 very high vibrating highside pressure

Sanden SD7V16 (or PXV16) compressor? If it's this one, i think it's supposed to fully destroke once a restriction keeps enough refrigerant from flowing around.
by Al9
Mon Oct 19, 2020 3:13 am
Forum: Automotive Air Conditioning Forum
Topic: Low oil level in the refrigerant
Replies: 2
Views: 897

Re: Low oil level in the refrigerant

Don't know how this test works, but it likely checks for how much oil is circulating together with the refrigerant, and a low oil circulation rate can also be caused by a lower than normal refrigerant charge. That said, having a FSM at hand would be the best option, but anyway Denso states ( here ) ...
by Al9
Sun Oct 18, 2020 3:45 am
Forum: Automotive Air Conditioning Forum
Topic: *FIXED**dying comp, cooling fan replaced* Old Delphi CVC-125 variable comp (TXV system) exhibiting a strange behaviour
Replies: 11
Views: 8661

Re: *FIXED**dying comp, cooling fan replaced* Old Delphi CVC-125 variable comp (TXV system) exhibiting a strange behavio

For anyone interested in the bubbling noise i experienced, according to this Denso patent https://patents.google.com/patent/JP2006200844A/en, it seems like it's entirely normal occurrence at low heat loads due to the TXV filling the evaporator up with a turbulent liquid refrigerant+oil flow while si...