Search found 240 matches

by Al9
Mon Jan 18, 2021 3:01 am
Forum: Automotive Air Conditioning Forum
Topic: 1996 Cadillac Seville new AC question
Replies: 7
Views: 102

Re: 1996 Cadillac Seville new AC question

Beware, a system with a not so efficient condenser/condenser fan (or severely overcharged on oil) can behave like it's overcharged even when the correct amount of refrigerant is inside. My car's AC had the former issue (a severely worn electric fan motor that didn't allow the fan to move enough air ...
by Al9
Sun Jan 17, 2021 4:59 pm
Forum: Automotive Air Conditioning Forum
Topic: 1996 Cadillac Seville new AC question
Replies: 7
Views: 102

Re: 1996 Cadillac Seville new AC question

Careful with the jumping a comp back to life stuff - this is what can happen if the problem is not enough refrigerant (static pressures can be really deceptive) and the compressor is not getting enough oil flowing back as a result. Whenever a low charge is suspected, recover, weigh and assess. No ot...
by Al9
Fri Jan 15, 2021 3:01 pm
Forum: Automotive Air Conditioning Forum
Topic: compressor oil quantity
Replies: 6
Views: 658

Re: compressor oil quantity

For the sake of clarity, here in Europe PAG 68 isn't OEM Sanden SP-15 - the OEM oil is pretty hard to find here too. PAG 68 is just an easily available AC lubricant also sold as "Universal PAG" under different brands. Viscosities are an intermediate between PAG 100 and PAG 46 - for some re...
by Al9
Thu Jan 14, 2021 1:47 am
Forum: Automotive Air Conditioning Forum
Topic: compressor oil quantity
Replies: 6
Views: 658

Re: compressor oil quantity

I'd say to read the new compressor's label/instructions in order to know which oil is needed, since Sanden SD7H15 comps are known to use different oil viscosity grades. SP-10 oil is PAG 46, SP-20 is PAG 100 and SP-15 is an intermediate grade oil (some say use PAG 68, which can be really hard to find...
by Al9
Tue Jan 12, 2021 4:26 am
Forum: Automotive Air Conditioning Forum
Topic: Evaporator fin density and differing TXV adjustments
Replies: 5
Views: 3183

Re: Evaporator fin density and differing TXV adjustments

I'd like to update this thread with new findings. In my quest to find a suitable (and possibly even better) replacement TXV for my car's VDC system (whose OEM TXV is now an NLA part), i tested two TXVs used with both Scion xB evaporator styles. I've tested a Denso 447500-2390 (Toyota PN 88515-52040,...
by Al9
Fri Jan 08, 2021 6:15 am
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 33
Views: 6317

Re: AC restoration questions, '93 Mazda RX7

Orings have to be lubed (with a non-hygroscopic AC lube/AC o-ring lube, such as the good ol' mineral, and Ester, unfortunately, is hygroscopic).
by Al9
Wed Dec 30, 2020 3:01 am
Forum: Automotive Air Conditioning Forum
Topic: Cannot get compressor to engage
Replies: 18
Views: 1661

Re: Cannot get compressor to engage

I can't stress this enough, going to a pro is always cheaper than a new comp. Charging with the comp on is a huge no no.

That poor comp was likely on its last legs anyway. The swashplate half-shoes are designed with great abuse in mind.
by Al9
Tue Dec 22, 2020 6:42 am
Forum: Automotive Air Conditioning Forum
Topic: Cannot get compressor to engage
Replies: 18
Views: 1661

Re: Cannot get compressor to engage

A bad AC clutch harness can do that. I had the same issue on my car and you had to yank the ECU side AC clutch harness to bring the clutch back to life (stopped working randomly on bumpy roads). Needed a new harness to be spliced in and has operated fine ever since. No amplifiers or any fancy stuff ...
by Al9
Thu Dec 17, 2020 2:15 am
Forum: Automotive Air Conditioning Forum
Topic: 2002 Pontiac Ram Air Trans Am ac is not cooling properly
Replies: 81
Views: 10906

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

Whenever you're in doubt, a visit to an RRR station equipped pro is always money well spent, no matter how much. When you turned the compressor on, it pulled refrigerant inside so slowly because, with so little refrigerant inside and so cold ambient temperature, it was fully destroked. If it can be ...
by Al9
Wed Dec 16, 2020 2:02 am
Forum: Automotive Air Conditioning Forum
Topic: 2002 Pontiac Ram Air Trans Am ac is not cooling properly
Replies: 81
Views: 10906

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

Make sure the AC system is fully charged with the specified amount of PAG oil.

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