Search found 82 matches

by wptski
Wed Aug 24, 2016 9:11 am
Forum: Automotive Air Conditioning Forum
Topic: AC overhaul pressure problem
Replies: 13
Views: 21320

Re: AC overhaul pressure problem

Cusser wrote:In Arizona, the AC clutch is engaged the vast majority of the time....
I've read in certain climates where some have installed clutch cycling bypass switches where possible.
by wptski
Sat Aug 20, 2016 1:33 pm
Forum: Automotive Air Conditioning Forum
Topic: Wynn's Frost temp parts
Replies: 3
Views: 7028

Re: Wynn's Frost temp parts

A sintered bronze bearing is impregnated with oil. Not good enough?
by wptski
Mon Aug 15, 2016 9:35 am
Forum: Automotive Air Conditioning Forum
Topic: How do I tell type of oil in system?
Replies: 5
Views: 8260

Re: How do I tell type of oil in system?

An analytical chemist (like me before I retired) could use FTIR to determine easily the oil type by comparing to standards. I did that with a few new or rebuilt compressors to determine whether PAG or R-12 type mineral oil had been added. There may be other ways, do a Google Search. FTIR is Fourier...
by wptski
Sat Aug 06, 2016 4:46 am
Forum: Automotive Air Conditioning Forum
Topic: Acura RDX AC Acting Strange
Replies: 15
Views: 24431

Re: Acura RDX AC Acting Strange

bohica2xo wrote:The target clearance is as tight as you can get it without dragging - it only gets larger with time.

After seeing the result of a mishap last year with the "smack the clutch while running" trick i quit recommending it.
What happened? Got tangled in the belt somehow, I assume?
by wptski
Sat Jul 30, 2016 7:23 am
Forum: Automotive Air Conditioning Forum
Topic: Advice needed
Replies: 8
Views: 14156

Re: Advice needed

The clutch bearing "only" comes into play when the clutch is "disengaged". When engaged you have more load on the belt, etc.
by wptski
Sun Jul 24, 2016 4:30 pm
Forum: Automotive Air Conditioning Forum
Topic: Intermittently working AC in a VW
Replies: 11
Views: 16319

Re: Intermittently working AC in a VW

What do you think would be the best way to do this? I think to make a proper test I actually need the PWM signal to still drive the compressor. I could disconnect the signal at the compressor, jumper it, and tap it there, except that I'm not sure I can get the right wires down there into the engine...
by wptski
Sun Jul 24, 2016 2:25 pm
Forum: Automotive Air Conditioning Forum
Topic: Intermittently working AC in a VW
Replies: 11
Views: 16319

Re: Intermittently working AC in a VW

VAG scan tool. Is there a way that doesn't cost as much as a new compressor? I have access to oscilloscopes and soldering equipment at the office. I was hoping I could just hook up some probes somewhere and monitor the signal on a scope? If it's a PWM signal it's nothing but a pulsed 12V at some fr...
by wptski
Sat Jul 23, 2016 10:35 am
Forum: Automotive Air Conditioning Forum
Topic: Why the change to: Charge by weight not psi?
Replies: 8
Views: 13673

Re: Why the change to: Charge by weight not psi?

I've done cars that with 1 ounce overcharge will cut out on high pressure- some systems take only 14 ounces or a pound-- very small room for error. Many scales might not have the accuracy for that. I have a Mastercool 98210-A and it's supposed to be +/- 0.5oz but I'm not sure if it really is. I wei...
by wptski
Fri Jul 22, 2016 7:43 pm
Forum: Automotive Air Conditioning Forum
Topic: New guy here with a question on Oil
Replies: 17
Views: 23392

Re: New guy here with a question on Oil

Thank you wptski If I decide to go that route or the pressurized can route is it okay to install the compressor dry? or should I put like one once in the compressor install it then vacuum the system and add the other 6 ounces with the pressurized can? Most new compressors come with oil installed bu...
by wptski
Fri Jul 22, 2016 7:27 pm
Forum: Automotive Air Conditioning Forum
Topic: New guy here with a question on Oil
Replies: 17
Views: 23392

Re: New guy here with a question on Oil

GM Tech wrote:30 ounces of oil ? really, refrigerant maybe, but not oil.. typical systems run 8 oz of oil....
You are correct, wrong colume in chart, 30oz of R12 and 7oz of oil.