Search found 273 matches

by Al9
Wed May 26, 2021 6:54 am
Forum: Automotive Air Conditioning Forum
Topic: Filling R134a from high side in liquid state with engine *OFF*
Replies: 19
Views: 811

Re: Filling R134a from high side in liquid state with engine *OFF*

A matter of cutting corners. A matter of half-arsing it by yourself rather than paying a pro for correct service with the correct equipment. And these damn 12 oz ref cans (AC self-servicing is thankfully banned here in Europe), and, generally speaking, all this "magic in a can" culture. Th...
by Al9
Tue May 25, 2021 3:40 pm
Forum: Automotive Air Conditioning Forum
Topic: Filling R134a from high side in liquid state with engine *OFF*
Replies: 19
Views: 811

Re: Filling R134a from high side in liquid state with engine *OFF*

Assuming the compressor is already filled with PAG, how is there wear on the compressor if the clutch doesn't engage and AC is not on? Indeed, the clutch gets engaged at some point, and that's when the poor compressor's bad day begins. This is one example of what may happen when trying to fill as v...
by Al9
Mon May 24, 2021 4:24 am
Forum: Automotive Air Conditioning Forum
Topic: 95 Tahoe AC Overcharge?
Replies: 21
Views: 730

Re: 95 Tahoe AC Overcharge?

Possible overcharge condition and lower than expected pressures tells me the orifice tube may be smaller than normal or there's another restriction somewhere. TXVs get their MOP setting according to engine displacement and whether the compressor displacement is computer controlled or not. Above thei...
by Al9
Sat May 22, 2021 3:57 pm
Forum: Automotive Air Conditioning Forum
Topic: Compressor mounting on it's side
Replies: 5
Views: 301

Re: Compressor mounting on it's side

Just wanted to elaborate upon Tim's reply. Having the 10PA refrigerant ports pointing downwards means that the refrigerant inside the suction line will have to travel upwards right before meeting the compressor's suction port. Any oil carried by the refrigerant will tend to separate and "siphon...
by Al9
Sat May 22, 2021 2:31 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor mounting on it's side
Replies: 5
Views: 301

Re: Compressor mounting on it's side

I believe there's no real problem with swashplate comps running in either direction (after all it's just thrust bearings, a rotating plate and a set of shoes, unlike wobble plate Sandens or V5s-V7s for example), but i might be wrong. I've studied different evaporator designs and never noticed the su...
by Al9
Fri May 21, 2021 2:22 am
Forum: Automotive Air Conditioning Forum
Topic: Filling R134a from high side in liquid state with engine *OFF*
Replies: 19
Views: 811

Re: Filling R134a from high side in liquid state with engine *OFF*

AC amateur point of view. It's a hard and delicate task, but ensuring the system is filled with the proper amount of refrigerant right before turning the compressor on is the only way to ensure correct oil return. Any other way, the compressor is unfortunately going to suffer some wear during the ch...
by Al9
Wed May 19, 2021 8:15 am
Forum: Automotive Air Conditioning Forum
Topic: Help identifying compressor type
Replies: 4
Views: 308

Re: Help identifying compressor type

I'm positively sure this is a fixed displacement Nippondenso 10S (a series of fixed displacement, double acting piston, swashplate compressors).
by Al9
Fri Apr 30, 2021 3:21 pm
Forum: Automotive Air Conditioning Forum
Topic: Help needed. A/C blowing hot air
Replies: 2
Views: 590

Re: Help needed. A/C blowing hot air

This car has a Delphi CVC compressor and a TXV. A particularly low refrigerant charge might still show seemingly ok static pressures, enough to allow compressor clutch engagement, but it will seriously hamper correct compressor displacement regulation by starving the evaporator, and this means warm ...
by Al9
Thu Apr 29, 2021 1:32 am
Forum: Automotive Air Conditioning Forum
Topic: 1996 Jeep Cherokee A/C trouble
Replies: 5
Views: 1540

Re: 1996 Jeep Cherokee A/C trouble

Recovery, leak test and proper recharge by weight into vacuum procedure + new receiver dryer + new TXV (and any o-ring that got disturbed) is the way i'd go here IMHO. TXVs are precision metering devices that suffer wear and tear, and their design often gets improved overtime.
by Al9
Sun Apr 25, 2021 8:16 am
Forum: Automotive Air Conditioning Forum
Topic: 2004 honda Accord low/high sides same preasure
Replies: 10
Views: 1917

Re: 2004 honda Accord low/high sides same preasure

Ice32, among other claims, seems to improve oil return, i.e. more oil will be in the compressor rather than elsewhere across the system, according to what the product claims. Definitely won't cause sealer like issues.