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post #526 of 572 (permalink) Old 06-15-2018, 05:18 PM
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If I would have known 500 posts would take that much off your fanny I would have skipped a few

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #527 of 572 (permalink) Old 06-16-2018, 05:13 AM Thread Starter
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What's the deal with 500 posts? One thread has 1,752.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #528 of 572 (permalink) Old 06-16-2018, 08:20 AM
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There's no deal. Sometimes it's easier later to find things later if you do a separate thread for separate issues, but in the grand scheme of things it's personal preference and doesn't matter at all. It's your thread: post away.

I've been here longer than Divot so I *outrank* him!

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post #529 of 572 (permalink) Old 06-16-2018, 08:23 AM
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Congrats Shakey!
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post #530 of 572 (permalink) Old 06-16-2018, 08:40 AM
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Shakey, you are an inspiration to all of us who are owned by these fine automobiles. Well done!
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post #531 of 572 (permalink) Old 06-16-2018, 11:46 AM Thread Starter
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I performed the O2 sensor test with a digital voltmeter today. Both the cruise and idle checks were within tolerance. I'm glad I don't have to fart around with adjusting the AFM!

That is an unhandy check to perform. If I thought I'd have to do it often, I'd 3D print a connector and make a harness that ran all the way back to the cockpit. As it was, I just used a twisted pair from a CAT5 cable.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #532 of 572 (permalink) Old 06-19-2018, 01:05 PM Thread Starter
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The Alfa passed state inspection yesterday! Now I just have to get to the license office during business hours.

The day prior to the inspection, I did the usual 'preflight'...checking horn, lights, etc. to ensure there were no problems. I also charged the AC system, so I could button everything back up for the inspection.

I bought a recharge kit, but didn't realize I needed the R12 to R134a adapters until I tried to connect it to the compressor. It took the whole bottle to charge the system from ambient atmospheric pressure to this point:



Another bottle of refrigerant would more fully charge the system, but it works well enough at that level. I'll monitor the system for leakdown, and decide if I want to charge it farther. I'm just excited that I have AC in the car for first time since I've owned it.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #533 of 572 (permalink) Old 06-19-2018, 02:36 PM
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Quote:
Originally Posted by Shakey View Post
I also charged the AC system, so I could button everything back up for the inspection. I bought a recharge kit, but didn't realize I needed the R12 to R134a adapters until I tried to connect it to the compressor. It took the whole bottle to charge the system from ambient atmospheric pressure. Another bottle of refrigerant would more fully charge the system, but it works well enough at that level. I'll monitor the system for leakdown, and decide if I want to charge it farther. I'm just excited that I have AC in the car for first time since I've owned it.
Hi Kevin,

Nice work!

The A/C in my '88 Spider hasn't worked since I bought the car in 2014. All the parts are there, but it only blows warm air. I assume it is still setup for use with R12 refrigerant.

After reading your post above, I was wondering if a recharge might be all my system needs. Is it really that easy to switch over to R134a and recharge the system as a DIY project? I realize it's a long shot, but who knows, maybe all my system components are good and there are no leaks. Other than the adapters, you didn't have to replace any parts to make your system compatible with R134a?

What recharge kit did you use, and which adapters will I need?

Thanks,

Edward
'88 Quad - "Claudia"
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post #534 of 572 (permalink) Old 06-19-2018, 02:49 PM
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You should probably get a new drier before charging. they cheap relatively speaking and worth it.

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #535 of 572 (permalink) Old 06-19-2018, 03:49 PM Thread Starter
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@Norseman50, there's differing information on AlfaBB about what's required to change to R134a, and how detrimental the mineral oil lubricant used with R12 is to R134a. There are supposedly products on the market that will flush the system of old lubricant. Some folks advocate changing the compressor and dryer regardless.

My AC hasn't worked since I've owned the car, almost 5 years now. In addition, I've removed the under-dash assembly a couple of times, to work on the heater core. So, I cannot trust anything the PO may have done, and the system has been open to the air on at least two occasions.

I'll tell you what I did in my case, so you can decide for yourself:
- Replaced the compressor. Mine was obviously bad, and needed replacing anyway, $130. I did it while I had the engine out of the car. (It sounds like @Susan retained her original compressor.
- Replaced the dryer/accumulator. I've read to do this anytime the system has been opened up to the air. Not a big deal: Part# 80-8080, $19.99 at O'Reilley's. It won't come up as an Alfa replacement item if you search, but it fits and connects perfectly.
- Replaced all the o-rings in the system. I bought a blister pack of assorted green AC o-rings, $6. (possibly optional for you)
- R12 to R134a adapters. I discovered that I needed an adapter to mate the 'snap-on' R134a connector of the recharge kit to the threaded R12 connector on the compressor. A blister pack with the low pressure adapter and two different high-pressure adapters was $10. I tried to do a search on O'Reilly's site, but couldn't find it; ask the counter help for assistance. I wish I had put the adapter on before I installed the engine; it's a tough reach with all the intake stuff installed. Also, be careful when installing the adapter (16mm in my case) that your socket is not also engaging the nut of the compressor's fitting. I caught myself in time before I stripped out the port.
- Recharge kit, $34.


I replaced the o-rings and the dryer. I removed the coolant overflow tank, and installed the low-pressure adapter on the S (suction) port of the compressor. With the engine running and the AC on high, I slightly loosened the suction hose, and let the system purge itself. A little mineral oil blew out onto the compressor housing, I tightened the hose, shut off the AC and engine, then wiped up the mineral oil. I then connected the recharge kit, and followed the instructions. The instructions are a bit oddly-worded, so read everything before you do anything. When finished, I disconnected the kit and reinstalled the overflow tank.

I am quite pleased with the results, and the system seems to be holding pressure well.
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-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #536 of 572 (permalink) Old 06-19-2018, 05:46 PM
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Quote:
Originally Posted by Norseman50 View Post
What recharge kit did you use, and which adapters will I need?

Thanks,
What he said!

Heck if I can chuck a new drier on (but how do you do this without expelling the old gas to the atmosphere?) the 156v6 and recharge myself I'd be very, very happy!!!!
Pete

'71 1750 Series 2 GTV:
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156 Series 1 v6 ... and remember it's all just opinions
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post #537 of 572 (permalink) Old 06-19-2018, 06:03 PM
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Any shop can catch it for you if you don't want it to vent. Either way the system needs to be drawn down with a vacuum pump before the new drier is installed otherwise charging a system with ambient air in it will kill the new drier and significantly impair the efficiency of the system.

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #538 of 572 (permalink) Old 06-19-2018, 06:05 PM Thread Starter
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Quote:
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What he said!

Heck if I can chuck a new drier on (but how do you do this without expelling the old gas to the atmosphere?) the 156v6 and recharge myself I'd be very, very happy!!!!
Pete
If your AC isn't working, there's a good chance that your R12 has already leaked out anyway.

-Kevin
1988 Spider Veloce (with lots of 3D printed parts)
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post #539 of 572 (permalink) Old 06-20-2018, 10:22 AM
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Originally Posted by gigem75 View Post
Any shop can catch it for you if you don't want it to vent. Either way the system needs to be drawn down with a vacuum pump before the new drier is installed otherwise charging a system with ambient air in it will kill the new drier and significantly impair the efficiency of the system.
Won't ambiant air get into the system the second you remove the old dryer?

Jeff
1989 Graduate S3
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post #540 of 572 (permalink) Old 06-20-2018, 11:12 AM
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good catch! after the drier is installed and before charging. I'll let it sit overnight to see if if holds the vacuum and doesn't leak.

The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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