Search found 269 matches

by Al9
Sun Jun 13, 2021 2:27 am
Forum: Automotive Air Conditioning Forum
Topic: Four Seasons Deslugger
Replies: 4
Views: 71

Re: Four Seasons Deslugger

I know a lot about small Jap cars and they like to use small displacement engines, fixed displacement (vane, piston, scroll) low mounted comps and Denso TXVs a lot for some reason. Slugging is never an issue there, otherwise you'd find these poor little things stalling all the time on the road. Noti...
by Al9
Sat Jun 12, 2021 2:51 am
Forum: Automotive Air Conditioning Forum
Topic: Valve cores
Replies: 4
Views: 65

Re: Valve cores

Once had my variable displacement comp stop going into stroke (cool air only while driving basically) in hot Summer weather about 2 weeks after correcting some minor leaks and RRR recharging by weight. Clutch coil thermal fuse then burned out and had to take it to shop for clutch coil R&R. Half ...
by Al9
Wed Jun 09, 2021 1:59 am
Forum: Automotive Air Conditioning Forum
Topic: No oil in the condenser
Replies: 15
Views: 157

Re: No oil in the condenser

Is it possible to flush the AC system effectively (excluding metal debris, of course) by removing the compressor and connecting to the lines where the compressor was, without removing other individual components? No. The drier has to be removed and bypassed (it's a filter), and the TXV will close o...
by Al9
Tue Jun 08, 2021 5:22 am
Forum: Automotive Air Conditioning Forum
Topic: No oil in the condenser
Replies: 15
Views: 157

Re: No oil in the condenser

Condensers, evaporators, driers, accumulators and compressors can store as much as 1 oz worth of oil even when nothing can actually be drained out of them. PAG and Ester lubricants are polar, so they cling to anything metal/desiccant media. Seen different field manuals where they list an oil return ...
by Al9
Thu May 27, 2021 4:07 am
Forum: Automotive Air Conditioning Forum
Topic: Filling R134a from high side in liquid state with engine *OFF*
Replies: 19
Views: 679

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

I believe aftermarket vendors want to use updated designs whenever possible. I've used a Chinese aftermarket comp myself (though a Calsonic CSV/Delphi CVC/Seltec DCS type variable displacement piston rather than a scroll; the housing looks completely different, the control and relief valves are loca...
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: 679

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: 679

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: 565

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: 264

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: 264

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...