Search found 11 matches

by pete_89t2
Sun Jun 03, 2018 9:19 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor/mag clutch noise - death rattle sound?
Replies: 7
Views: 289

Re: Compressor/mag clutch noise - death rattle sound?

Thanks for the de-slugging gadget link. Just pulled the belt and hand checked the compressor & mag clutch. When de-energized, the pulley spins smooth & easy with no noises. Energized the clutch with a jumper to +12V and the compressor turns with the normal resistance you would expect as it c...
by pete_89t2
Sun Jun 03, 2018 4:54 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor/mag clutch noise - death rattle sound?
Replies: 7
Views: 289

Re: Compressor/mag clutch noise - death rattle sound?

Interesting... I had to look up "slugging" since I was unfamiliar with the term. Still wondering how that might occur though. I suppose that if the system lost a little refrigerant over the years, but not enough to make a noticeable difference in cooling performance, the compressor might b...
by pete_89t2
Sat Jun 02, 2018 1:36 pm
Forum: Automotive Air Conditioning Forum
Topic: Compressor/mag clutch noise - death rattle sound?
Replies: 7
Views: 289

Re: Compressor/mag clutch noise - death rattle sound?

I'd pull the belt that turns the compressor and spin the idler pulley by hand, see if the pulley feels bad or makes a noise, I've had bad AC idler pulley on my Frontier. Great suggestion, I should have thought of doing that while I was re-checking the belt! Taking that idea one step further, with t...
by pete_89t2
Sat Jun 02, 2018 4:54 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor/mag clutch noise - death rattle sound?
Replies: 7
Views: 289

Compressor/mag clutch noise - death rattle sound?

Car is a 2003 Mazda Protege5, factory AC with about 182K miles on the clock. Its AC system still works fine - it cools the car's cabin well enough in hot & humid MD, and the compressor seems to cycle on & off when it's supposed to. I've owned the car since new, and the AC system has never ne...
by pete_89t2
Tue May 29, 2018 7:19 am
Forum: Automotive Air Conditioning Forum
Topic: No Idle Change with A/C On
Replies: 12
Views: 619

Re: No Idle Change with A/C On

Sounds like your ECU is doing a good job with the closed loop idle control then... It's making those constant adjustments to compensate for loads, but the feedback loop is tuned well enough that it's not noticeable to the driver. Apparently those Hyundai engineers did a good job. Tuning an ECU to gi...
by pete_89t2
Tue May 29, 2018 5:45 am
Forum: Automotive Air Conditioning Forum
Topic: No Idle Change with A/C On
Replies: 12
Views: 619

Re: No Idle Change with A/C On

Are you saying there is no change in idle speed AT ALL (idles up or down) when you flip on the AC? If that's true, are you basing your assessment of idle speed solely on what the factory tach is showing you, or is your assessment also factoring in your senses? (i.e., does the engine sound/feel like ...
by pete_89t2
Thu May 10, 2018 12:18 pm
Forum: Automotive Air Conditioning Forum
Topic: Stuck Compressor Clutch Plate: Suggestions on Removal
Replies: 27
Views: 1516

Re: Stuck Compressor Clutch Plate: Suggestions on Removal

That shaft looks pretty rusty.... Try a good penetrating lube, like PB Blaster, soak the crap out of it and let it marinate overnight. Then try pulling/prying it off again tomorrow. You'll also have better luck pulling/prying it off if you remount the compressor solidly to its engine bracket rather ...
by pete_89t2
Mon Apr 16, 2018 4:52 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: How much to tighten O-ring fittings
Replies: 3
Views: 842

Re: How much to tighten O-ring fittings

One other point you need to know about installing O-rings is to never install them dry. Always lube them with whatever compressor oil your AC system uses prior to installation.
by pete_89t2
Sun Jul 23, 2017 6:21 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor clutch sticking when de-energized
Replies: 2
Views: 1283

Re: Compressor clutch sticking when de-energized

I've been in contact with the rebuilder, they said the issue is likely shipping/handling damage. Apparently these clutches have pretty tight tolerances, and it doesn't take much of an impact to cause a clutch to behave this way. Also told them that I'm using HFC152a for refrigerant, and was expectin...
by pete_89t2
Wed Jul 19, 2017 11:57 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor clutch sticking when de-energized
Replies: 2
Views: 1283

Compressor clutch sticking when de-energized

I recently did a complete restoration of the AC system in my '89 Mazda RX7 turbo. Purchased a rebuilt compressor (Nippon Denso model), new receiver/dryer and new expansion valve. Old compressor finally seized up. Also replaced all O-rings & properly flushed out all the reused components (hard li...

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