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'78 Royale A/C orifice [message #305711]

Sun, 21 August 2016 13:12

SCFire1

Messages: 19
Registered: April 2016
Location: Cross Anchor, SC

Karma: 0

Junior Member

Does anyone know what size the A/C orifice is on a 1978 Royale? I need to replace mine according to the A/C guy. Thanks in advance!

John Mitchell Cross Anchor, SC (upstate SC) 1978 Royale Owned by my cousin in California for 30 years....purchased by a gentleman in the Atlanta area 7 years ago...finding my cousin's GMC by accident....Priceless!

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Re: '78 Royale A/C orifice [message #305785 is a reply to message #305711]

Mon, 22 August 2016 00:03

Adrien G.

Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624

Karma: 1

Senior Member

John,

If my thinking is right you have an expansion valve system, not an orifice system.
I have not seen a vehicle AC without an expansion type valve'
Check the part houses or the net for the valve needed.

Adrien & Jenny Genesoto 75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6

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Re: '78 Royale A/C orifice [message #305808 is a reply to message #305711]

Mon, 22 August 2016 11:39

Rick Williams

Messages: 256
Registered: July 2004

Karma: 0

Senior Member

If he says that you need a new orifice, then he does not know much about the GMC A/C system. I would look for another repair facility or better yet, start here by telling us what is the status of your system.

Rick

Rick Williams
Bliss, Michigan
1978 Eleganza II

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Re: [GMCnet] '78 Royale A/C orifice [message #305813 is a reply to message #305808]

Mon, 22 August 2016 12:00

Keith V

Messages: 2337
Registered: March 2008
Location: Mounds View,MN

Karma: 0

Senior Member

I think "needs a new orifice" is AC shop lingo for "we're going to ream your orifice"

Find a non crook, but thats difficult to do in the AC repair business, they all think they are wizards

----------------------------------------

>
> If he says that you need a new orifice, then he does not know much about the GMC A/C system. I would look for another repair facility or better yet,
> start here by telling us what is the status of your system.
>
> Rick
> --
> Rick Williams
> Bliss, Michigan
> 1978 Eleganza II
>
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75 ex Royale GMC
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My427v8@hotmail.com

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Re: '78 Royale A/C orifice [message #305827 is a reply to message #305808]

Mon, 22 August 2016 16:12

Ken Burton

Messages: 10030
Registered: January 2004
Location: Hebron, Indiana

Karma: 10

Senior Member

Fraud alert! FRAUD ALERT!

Since an orifice is under $5.00, I would take them a new one and ask exactly where they intend to install it.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: '78 Royale A/C orifice [message #305840 is a reply to message #305827]

Mon, 22 August 2016 18:38

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

Ken Burton wrote on Mon, 22 August 2016 17:12

Fraud alert! FRAUD ALERT!

Since an orifice is under $5.00, I would take them a new one and ask exactly where they intend to install it.

I would seriously caution this approach.
If you do use this approach, bring KY, it is water soluble and therefore easier to clean off.
Wink

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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Re: '78 Royale A/C orifice [message #305856 is a reply to message #305840]

Mon, 22 August 2016 22:54

Ken Burton

Messages: 10030
Registered: January 2004
Location: Hebron, Indiana

Karma: 10

Senior Member

Matt, I have told this story before and this sounds like the same guy.

My daughter took her Blazer in for a front end alignment. They put her car on the alignment rack and then came to her and said:

Service writer: "You need your ball joints replaced. We can't align it that way it is."
Heather: "Which ones are bad?"
SW: "All of them"
Heather: "That is interesting because I just replaced the lowers 3 weeks ago."
SW: "Well whoever said they did the work did not replace them."
Heather: "I did the work. That is why I brought it to you to check the alignment. Take my car off of your alignment rack and I'll take it to an honest place of business."

I think this same guy or company also does AC work.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: '78 Royale A/C orifice [message #305867 is a reply to message #305856]

Tue, 23 August 2016 06:53

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

Ken Burton wrote on Mon, 22 August 2016 23:54

Matt, I have told this story before and this sounds like the same guy.

My daughter took her Blazer in for a front end alignment. They put her car on the alignment rack and then came to her and said:

Service writer: "You need your ball joints replaced. We can't align it that way it is."
Heather: "Which ones are bad?"
SW: "All of them"
Heather: "That is interesting because I just replaced the lowers 3 weeks ago."
SW: "Well whoever said they did the work did not replace them."
Heather: "I did the work. That is why I brought it to you to check the alignment. Take my car off of your alignment rack and I'll take it to an honest place of business."

I think this same guy or company also does AC work.

Ken,

I love it.
I will log that one with guy that had been charged for 5qts and a filter for an old VW.

Matt

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Re: [GMCnet] '78 Royale A/C orifice [message #305871 is a reply to message #305856]

Tue, 23 August 2016 07:33

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma: 9

Senior Member

My S-10 had a similar experience in Atlanta a few years ago: I was at a
tire/alignment shop for some unrecalled reason. They were running a
"special" on alignment, so I let them put my 40K mile S-10 on the rack.
"MAN! You need lower ball joints BAD! Those S-10's have the worst ball
joints on the road. They're so bad, they're the only ones we keep in
stock!"

Begging off on schedule, I left & haven't been back to an alignment shop
during the past 80K+ miles. Never had any adverse tire wear and the S-10
still drives better than the Lexus. :-)

Ken H.

On Mon, Aug 22, 2016 at 11:54 PM, Ken Burton wrote:

> Matt, I have told this story before and this sounds like the same guy.
>
> My daughter took her Blazer in for a front end alignment. They put her
> car on the alignment rack and then came to her and said:
> ...
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Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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Re: [GMCnet] '78 Royale A/C orifice [message #305878 is a reply to message #305867]

Tue, 23 August 2016 08:47

emerystora

Messages: 4442
Registered: January 2004

Karma: 13

Senior Member

> Ken Burton wrote on Mon, 22 August 2016 23:54
>> Matt, I have told this story before and this sounds like the same guy.
>>
>> My daughter took her Blazer in for a front end alignment. They put her car on the alignment rack and then came to her and said:
>>
>> Service writer: "You need your ball joints replaced. We can't align it that way it is."
>> Heather: "Which ones are bad?"
>> SW: "All of them"
>> Heather: "That is interesting because I just replaced the lowers 3 weeks ago."
>> SW: "Well whoever said they did the work did not replace them."
>> Heather: "I did the work. That is why I brought it to you to check the alignment. Take my car off of your alignment rack and I'll take it to an
>> honest place of business."
>>
>> I think this same guy or company also does AC work.
>
Reminds me of when I moved to Colorado and the air conditioner stopped working in our Jeep Cherokee. I jumpered the air conditioning clutch and it would get very cold. Using my gauges I found that the pressures were correct on the R134a. Checking further I determined that I had a bad electric thermostatic switch.

I could get it to cool fine by the jumper on the clutch but it would run all the time and not automatically shut down. I saw a sign at the local AMMCO shop saying “Free Air Conditioning Check”. When I brought the car in I told them what was wrong. The desk man said they had to take the car into the shop but I was not allowed in the shop and would have to wait in the waiting room. 15 minutes later they told me that the system was empty and that I needed a total recharge that would cost $380. I asked them about the switch and they said the technician didn’t say anything about that but he assured me that a freon recharge would make the air conditioner work fine again. Instead of telling him that he was a lying SOB (not some other brand), I just said I’d have to think about it and left.

It was too much work for me to tear apart the dash to get to the bad switch so I left it alone and just put in a toggle switch to jumper the clutch. When it got too cold inside I would turn the switch off for awhile. I used it that way all summer until I traded it in for a new car the next spring.

Every time for the last three years when I drive by that shop I mutter “crooks”. My wife tells me I have a memory like a stubborn elephant.

Unfortunately there are enough crooked mechanics out there that they make us suspicious of all of them.

Emery Stora
77 Kingsley
Frederick, CO

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Re: '78 Royale A/C orifice [message #305880 is a reply to message #305711]

Tue, 23 August 2016 09:32

JohnL455

Messages: 4447
Registered: October 2006
Location: Woodstock, IL

Karma: 12

Senior Member

The reason I bought a 240v computer spin balancing machine. They don't jack your vehicle wrong, crossthread the lugs, run the nuts down with an impact and then get the balance wrong when then can't get near your vehicle.

John Lebetski
Woodstock, IL
77 Eleganza II

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Re: [GMCnet] '78 Royale A/C orifice [message #305885 is a reply to message #305880]

Tue, 23 August 2016 10:14

emerystora

Messages: 4442
Registered: January 2004

Karma: 13

Senior Member

For those having machined balanced wheels done for your GMC be sure to tell them that you want them to use an adapter the mounts through the lug holes. Otherwise they just use a cone going through the center hole. If doing this they could check the balance again and they would find its wrong. I once had them check a wheel three times and they kept changing the position of the wrights and it still wasn't right. I finally took the motorhome to another shop that did it right.

Emery Stora

> On Aug 23, 2016, at 8:32 AM, John R. Lebetski wrote:
>
> The reason I bought a 240v computer spin balancing machine. They don't jack your vehicle wrong, crossthread the lugs, run the nuts down with an impact
> and then get the balance wrong when then can't get near your vehicle.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
> Source America First
>
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Re: [GMCnet] '78 Royale A/C orifice [message #305886 is a reply to message #305885]

Tue, 23 August 2016 10:37

Keith V

Messages: 2337
Registered: March 2008
Location: Mounds View,MN

Karma: 0

Senior Member

I made the mistake of getting a 'free' tire inspection the day before leaving on a trip, and told them so.

They just happened to find a large fresh knife cut on the inside sidewall of my rear tire.
I looked at it, looked at the angle of the slash and I knew they had done it. They knew I knew.
I think I said something about it being a knife cut.
They just happened to have a replacement tire available right away.

Lucky me

----------------------------------------

>
> For those having machined balanced wheels done for your GMC be sure to tell them that you want them to use an adapter the mounts through the lug holes. Otherwise they just use a cone going through the center hole. If doing this they could check the balance again and they would find its wrong. I once had them check a wheel three times and they kept changing the position of the wrights and it still wasn't right. I finally took the motorhome to another shop that did it right.
>
> Emery Stora
>
>> On Aug 23, 2016, at 8:32 AM, John R. Lebetski wrote:
>>
>> The reason I bought a 240v computer spin balancing machine. They don't jack your vehicle wrong, crossthread the lugs, run the nuts down with an impact
>> and then get the balance wrong when then can't get near your vehicle.
>> --
>> John Lebetski
>> Woodstock, IL
>> 77 Eleganza II
>> Source America First
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
> _______________________________________________
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> Unsubscribe or Change List Options:
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com

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Re: '78 Royale A/C orifice [message #305941 is a reply to message #305785]

Wed, 24 August 2016 16:45

Bob de Kruyff

Messages: 4260
Registered: January 2004
Location: Chandler, AZ

Karma: 1

Senior Member

Adrien G. wrote on Sun, 21 August 2016 23:03

John,

If my thinking is right you have an expansion valve system, not an orifice system.
I have not seen a vehicle AC without an expansion type valve'
Check the part houses or the net for the valve needed.

Almost all new vehicles use an orifice tube in place of an expansion valve--however the GMC is not one of them.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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Re: '78 Royale A/C orifice [message #305961 is a reply to message #305941]

Wed, 24 August 2016 23:54

Adrien G.

Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624

Karma: 1

Senior Member

Bob de Kruyff wrote on Wed, 24 August 2016 14:45

Adrien G. wrote on Sun, 21 August 2016 23:03
John,

If my thinking is right you have an expansion valve system, not an orifice system.
I have not seen a vehicle AC without an expansion type valve'
Check the part houses or the net for the valve needed.

Almost all new vehicles use an orifice tube in place of an expansion valve--however the GMC is not one of them.

Bob,

What kind of performance can be expected with constant metered freon flow system, like used on house fridge/freezer and cheap room AC units?
Expansion valves adjusts the freon flow to the cooling demand, and a vehicle can have a lot of variable cooling demands. Hot car with 1 heater (driver)
to a hot car and 4 heaters (persons).
I like to have excess BTU and not use all of it all the time, then to be at max and also be sweating.
I'm not one in the global warming corner.

[Updated on: Thu, 25 August 2016 00:01]

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