Search found 153 matches

by Al9
Sun Jul 26, 2020 2:58 pm
Forum: Automotive Air Conditioning Forum
Topic: Very weak cooling suddenly?
Replies: 6
Views: 287

Re: Very weak cooling suddenly?

Knowing which Buick from 1988 it is is important, since at least 4 Buicks from this year come with a GM V5 variable displacement compressor. These ones have a control valve which can fail (they used to come without filters, new replacement ones come with them instead, maybe it's just a matter of deb...
by Al9
Tue Jul 21, 2020 8:50 am
Forum: Automotive Air Conditioning Forum
Topic: Smell from vents after new compressor
Replies: 3
Views: 524

Re: Smell from vents after new compressor

No definite idea, vent smells are hard to diagnose. Just wanted to comment the orifice tube smell.

If that car were mine, i'd have a refrigerant leak test done by a professional equipped with the appropriate tools, so to rule out any possible evaporator leak.
by Al9
Tue Jul 21, 2020 8:12 am
Forum: Automotive Air Conditioning Forum
Topic: Smell from vents after new compressor
Replies: 3
Views: 524

Re: Smell from vents after new compressor

The old orifice tube might smell of compressor oil (PAG oil actually). This oil travels with the refrigerant across the entire AC system. I have bought several auto TXVs to play with and some second hand parts for my car's AC (hoses, evaporator, TXV) and they all contained some leftover oil and smel...
by Al9
Tue Jul 21, 2020 2:19 am
Forum: Automotive Air Conditioning Forum
Topic: 99 Maxima poor cooling *SOLVED*
Replies: 18
Views: 1645

Re: 99 Maxima poor cooling *SOLVED*

Great, so you can see how correct TXV operation is critical with these systems. You might now want to have the system recharged to the precise refrigerant amount through an RRR station as i said before. There's no "just about right" with these compressors at all. Specified charge weight, o...
by Al9
Fri Jul 17, 2020 9:30 am
Forum: Automotive Air Conditioning Forum
Topic: 68 Vette Cycle Issues
Replies: 6
Views: 420

Re: 68 Vette Cycle Issues

If i remember correctly (please correct me otherwise), this system features an oil return line on the evaporator's bottom. If so, the original TXV is definitely of a type that is going to interfere with a cycling pressure switch...
by Al9
Thu Jul 16, 2020 12:15 pm
Forum: Automotive Air Conditioning Forum
Topic: 68 Vette Cycle Issues
Replies: 6
Views: 420

Re: 68 Vette Cycle Issues

A TXV and suction pressure controlled AC clutch cycling (or even compressor destroking) is a huge no no. They're like Tom & Jerry, especially with low heat loads. Unless the pressure setpoint is somehow kept outside of the TXV's control range (the pressure range in which the TXV is able to throt...
by Al9
Wed Jul 15, 2020 2:22 am
Forum: Automotive Air Conditioning Forum
Topic: 1961 cadillac conversion
Replies: 48
Views: 5446

Re: 1961 cadillac conversion

That PAG 150 is surely going to get really thick inside a cold evaporator. Maybe that's what aggravates oil return issues with low charge.
by Al9
Tue Jul 14, 2020 11:01 am
Forum: Automotive Air Conditioning Forum
Topic: Jeep Liberty AC Compressor question
Replies: 10
Views: 769

Re: Jeep Liberty AC Compressor question

In my humble Euro/Jap MPV/Kei laden with different GM parts this behaviour was the result of a failing AC clutch connector, the one coming from the ECU harness in particular. Though things were even wackier than that. Basically it started acting up in the summer, otherwise perfectly fine. Ride aroun...
by Al9
Tue Jul 14, 2020 8:12 am
Forum: Automotive Air Conditioning Forum
Topic: Rattling from new receiver dryer
Replies: 6
Views: 503

Re: Rattling from new receiver dryer

Thanks for this info Tim. Just so you know, the dealer is basically giving me the runaround. They say they can't help me and to ask a specialist. Seems like getting someone to the shop/warehouse and checking these filters is an overwhelming task for them. Now i understand what kind of people i'm dea...
by Al9
Mon Jul 13, 2020 11:06 am
Forum: Automotive Air Conditioning Forum
Topic: 99 Maxima poor cooling *SOLVED*
Replies: 18
Views: 1645

Re: 99 Maxima poor cooling

What Cusser is saying. Reheating happens whenever air that has passed through a live evaporator is routed through a live heater core. Either done on purpose to get all glasses demisted at the snap of a finger, or unintentional (malfuctioning heater core valve/air flap/control mechanism or system).

Go to advanced search