My ongoing A/C Drama!

My ongoing A/C Drama!

Postby Lee in Mountain View [OP] » October 3rd 2020, 8:09pm

Hello again members!

As I mentioned in my last episode; Blowing Cold! 40 Degrees! I though I had solved my A/C system problems of no cold air. Well, i did for a time. Slowly, over a period of more than a month, my A/C wasn’t as cold. So, figuring i had another leak, i looked again for leaks i may have missed. I believe i found in on the refrigerant hose that runs under the van to the rear A/C. This was suggested as a possible leak location in one of my earlier episodes. Found it with the help of the fluorescent dye. So, i plan to replace it tomorrow. The hose comes with o-rings, the A/C kit I purchased supplied o-rings. The ones on the replacement hose are the usual black o rings and the kit supplied the green o rings. Any opinion on which are better? Should i use what’s on the hose or change them out?

thanks...........Lee in Mountain View
Attachments
019CA821-F173-482C-B5E2-4228ED0604C2.jpeg
D4A35CCE-1851-4717-BEDC-C99211777916.jpeg
My Tow Vehicle!
Original Poster [OP]
User avatar
Lee in Mountain View
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: Lee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full years
Posts: 134
Topics: 24
Joined: November 2016
Location: Mountain View, Ca
Gender: Male
Alias (AKA):
Van Model Year: 2005
Van Make/Model: GMC Safari
Extra Info: 4.3L V6 RWD

  • Similar topics
    Replies
    Views
    Author
  • A/C repair drama comes to an end!
    by Lee in Mountain View » October 17th 2020, 7:16pm in Climate Control
    5 Replies
    212 Views
    Last post by Lee in Mountain View View the latest post
    October 18th 2020, 2:00am
  •  
    7
    62
    Last post by AstroSafari.com View the latest post
    November 25th 2020, 5:51am

Re: My ongoing A/C Drama!

Postby Rod's TrucksRod's Trucks is online! » October 3rd 2020, 8:45pm

Rod's TrucksRod's Trucks is online!
Firing on 4 Cylinders (L1)
Firing on 4 Cylinders (L1)
Posts: 401
Topics: 25
Images: 54
Joined: January 2020
Location: Issaquah, WA
Gender: Male
Alias (AKA): Rod and/or WE7X
Van Model Year: 1998
Van Make/Model: Chevrolet Astro
Extra Info: Forest Green LS AWD

Re: My ongoing A/C Drama!

Postby Lee in Mountain View [OP] » October 3rd 2020, 9:28pm

Thank you!!
My Tow Vehicle!
Original Poster [OP]
User avatar
Lee in Mountain View
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: Lee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full years
Posts: 134
Topics: 24
Joined: November 2016
Location: Mountain View, Ca
Gender: Male
Alias (AKA):
Van Model Year: 2005
Van Make/Model: GMC Safari
Extra Info: 4.3L V6 RWD

Re: My ongoing A/C Drama!

Postby N6KB » October 3rd 2020, 10:00pm

Interesting about the o-ring colors. Are these color and characteristics relations an industry wide standard or do they only apply to the products from this specific supplier?
N6KB
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: N6KB has been a member for 7 full yearsN6KB has been a member for 7 full yearsN6KB has been a member for 7 full yearsN6KB has been a member for 7 full yearsN6KB has been a member for 7 full yearsN6KB has been a member for 7 full yearsN6KB has been a member for 7 full years
Posts: 210
Topics: 49
Images: 6
Joined: March 2013
Alias (AKA): N6KB
Van Model Year: 2005
Van Make/Model: Chevrolet Astro
Extra Info: 4.3L V6 RWD

Re: My ongoing A/C Drama!

Postby MechBob » October 3rd 2020, 10:20pm

There really is no "industry standard" for colors.Even black is used by some for r134.Will try to post a bit more.
User avatar
MechBob
Firing on 1 Cylinder (L2)
Firing on 1 Cylinder (L2)
Years of Membership: MechBob has been a member for 2 full yearsMechBob has been a member for 2 full years
Posts: 1195
Topics: 11
Images: 12
Joined: August 2018
Gender: Male
Alias (AKA): Bob
Van Model Year: 1994
Van Make/Model: Chevrolet Astro
Extra Info: 4x4

Re: My ongoing A/C Drama!

Postby MechBob » October 3rd 2020, 10:21pm

Prior to 1987, O-Rings for R-12 mobile AC applications were almost exclusively black.
Material-wise, the rubber in these O-Rings may have been Nitrile (Buna-N), Neoprene, or a blend
of these two compounds. In 1987, the Montreal Protocol mandated the change to a non-ozone depleting
refrigerant and OEMs around the world unanimously selected R-134a as the refrigerant
to replace R-12. In the aftermarket, refrigerants were offered that were blends of various base
refrigerants. Whether using R-134a or a blend of other refrigerants, the common trait among these
new refrigerants is that a different O-Ring compound was recommended for sealing. Several
new rubber compounds were identified as being suitable for sealing R-134a and the blend
refrigerant. The O-Rings that were made from these new rubbers have commonly been colored in
order to distinguish them from the earlier black O-Rings that were compatible only with R-12.
Over the past 15 years, O-Rings used in sealing hoses and components of mobile AC systems
have routinely been one of three colors: black, blue, or green. Black O-Rings offered by Four
Seasons are Neoprene and are fully compatible with R-134a, however, it is impossible to look at a
black O-Ring and tell if it is Nitrile (R-12) or Neoprene (R-134a). That is the reason colors have
been adopted. Blue and green have become the standard colors for those applications. The blue
O-Rings that are available today are Neoprene. They are colored blue with an external coating to
distinguish them from black nitrile O-Rings that are identical in appearance yet not recommended
for use with R-134a. The green O-Rings are Highly Saturated Nitrile (also known as
Hydrogenated Nitrile) and are commonly referred to as HNBR or, in some cases, HSN. In either
case, the green color is molded into the rubber. The blue Neoprene and green HNBR O-Rings are
interchangeable in their applications with R-134a, blended refrigerants, and R-12 as well.
Recently, there has been a move to consolidate the black Neoprene, blue Neoprene, and green
HNBR O-Rings offered in the Four Seasons product line to all green HNBR O-Rings. The
rationale behind this is that if all these O-Rings are equally compatible with R-134a, then it is
unnecessary to offer more than just one type. The elimination of the numerous duplicate part
numbers for black, blue, and green O-Rings will offer obvious benefit and will result in a general
simplification of the O-Ring selection process. The elimination of black Neoprene from the mix
is obvious as this compound presents an identification problem for the service technician. The
reason for selecting green HNBR over blue Neoprene is twofold. First is the fact that green
HNBR has OE acceptance and application whereas blue Neoprene has been predominantly an
aftermarket phenomenon. The second reason is because green HNBR has a slightly higher
operating temperature range when compared to Neoprene which makes it the slightly more
desirable choice. Add to these the earlier mentioned benefit of a large reduction in O-Ring SKUs
through the elimination of black and blue O-Ring part numbers and you have a clear picture of
why this change taking place.
User avatar
MechBob
Firing on 1 Cylinder (L2)
Firing on 1 Cylinder (L2)
Years of Membership: MechBob has been a member for 2 full yearsMechBob has been a member for 2 full years
Posts: 1195
Topics: 11
Images: 12
Joined: August 2018
Gender: Male
Alias (AKA): Bob
Van Model Year: 1994
Van Make/Model: Chevrolet Astro
Extra Info: 4x4

Re: My ongoing A/C Drama!

Postby Lee in Mountain View [OP] » October 3rd 2020, 10:41pm

Excellent information! Thanks MechBob!

Lee in Mountain View
My Tow Vehicle!
Original Poster [OP]
User avatar
Lee in Mountain View
Firing on 1 Cylinder (L1)
Firing on 1 Cylinder (L1)
Years of Membership: Lee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full yearsLee in Mountain View has been a member for 4 full years
Posts: 134
Topics: 24
Joined: November 2016
Location: Mountain View, Ca
Gender: Male
Alias (AKA):
Van Model Year: 2005
Van Make/Model: GMC Safari
Extra Info: 4.3L V6 RWD

Re: My ongoing A/C Drama!

Postby sixsix » October 3rd 2020, 10:54pm

Wow, just wow !!
Good data and plenty of it. Material - wise especially.
Gotta' Love the Neoprene vs Nitrile wars.

Thanks again, Bob.
.

Well, after all... what would Banacek say ?... “May be hard to believe... President Trump should rest easy and concede what was in fact a foregone conclusion: Another OLD MAN won with only about 50% of the Change Believers/Fools showing up."

.
User avatar
sixsix
Firing on 4 Cylinders (L5)
Firing on 4 Cylinders (L5)
Years of Membership: sixsix has been a member for 6 full yearssixsix has been a member for 6 full yearssixsix has been a member for 6 full yearssixsix has been a member for 6 full yearssixsix has been a member for 6 full yearssixsix has been a member for 6 full years
Posts: 4427
Topics: 38
Images: 1303
Joined: May 2014
Location: Edgewood, Northern Ky.
Gender: Male
Alias (AKA): Mike
Van Model Year: 1992
Van Make/Model: Chevrolet Astro
Extra Info: LT W CPI - RWD 200K

Re: My ongoing A/C Drama!

Postby AstroWill » October 4th 2020, 1:30am

I would use the new ones from the kit.

MechBob wrote:Prior to 1987, O-Rings for R-12 mobile AC applications were almost exclusively black..........

https://www.ericthecarguy.com/forums/to ... r-changes/

or directly from the 4seasons tech tip PDF linked here.
Attachments
4S 376 O-RING COLOR CHANGES.PDF
(33.58 KiB) Downloaded 8 times

Trolls take away from productive work, best to ignore them & go about your business.
What has two thumbs and is living in your head rent-free? We hereby claim that it's this guy! Image
User avatar
AstroWill
Technical Director
Technical Director
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: AstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full yearsAstroWill has been a member for 11 full years
Posts: 11088
Topics: 108
Images: 443
Joined: February 2009
Alias (AKA): Critical Thinking+Common Sense
Van Make/Model: Chevrolet Astro


 
  • Related topics
    Replies
    Views
    Last post

Return to Climate Control

It is currently November 25th 2020, 5:51am

Climate Control Forum
Climate ControlTopics regarding the climate control in the cabin of the van. Discuss things like air conditioning, refrigerant recharging, and dual climate controls, a/c vents, accumulator or defrosters, heater core, or fan inside the van.
To create a new topic in Climate Control, click this button:
Previous topic Next topic
Recent Image Attachments
Views: 162
Comments: 10
Date: Nov 19 '20
Time: 9:33pm
» Read last comment
Views: 162
Comments: 10
Date: Nov 18 '20
Time: 5:15pm
» Read last comment
Attached by:
doogaloo
in Climate Control
Views: 221
Comments: 9
Date: Nov 09 '20
Time: 11:08pm
» Read last comment
Views: 599
Comments: 3
Date: Oct 31 '20
Time: 9:45pm
» Read last comment
Attached by:
Devo
in Climate Control
Views: 175
Comments: 6
Date: Oct 25 '20
Time: 10:53pm
» Read last comment
Sponsors

Who is online

Users browsing this forum: No registered users and 7 guests