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2005 GMC Envoy 4X4 4.2L Expansion Tube?
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MarineGrunt
Enthusiast
Aug 26, 2013, 5:28 AM
Post #26 of 37
(1440 views)
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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It has always been cold enough. Whenever we've been on long road trips, no matter how hot it has been, we've never had to keep it on the highest setting. Now if you're sitting at a stoplight for awhile it would be nice if it would get a bit cooler though. I'm surprised these double systems don't have a separate compressor or at least a bigger one. Not that it needs it but do they have any aftermarket compressors or any other component that would help to make it colder at idle? Just curious.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 26, 2013, 6:17 AM
Post #27 of 37
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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Compressors get weak and they lose suction at lower RPMs. Condensers get partially clogged and don't see enough air at idle. You'll be spending a lot of money to try to correct that. Just make sure the fan is pulling enough air.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 26, 2013, 6:50 AM
Post #28 of 37
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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I doubt you've missed much or anything MG. On the maybe list is plain age and exact ability of compressor and condenser IMO if this was better before perhaps some time ago.
? Condenser nice and clean even between it and radiator? Bugs or anything of the sort?
Some off the wall reports include: Refrigerant hacking such that it's not exactly as labeling says but some mix or not pure. Mostly reported for Chinese made product or still R-12 made in places that still do that isn't applicable with this is more common.
Recovered refrigerant that is contaminated?
One (just one) reported a factory flaw with a chunk wedged inside condenser from manufacturing that blocked a % of its efficiency - an A/C teacher/professor from Phoenix who cut one open to discover this!
That's all I can think of at the moment,
T
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MarineGrunt
Enthusiast
Aug 26, 2013, 10:06 AM
Post #29 of 37
(1427 views)
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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It works just as good as before but we've only owned it for a little over a year. It's cold enough. Even at idle it's cold enough to keep anyone from complaining about it. If the wife says it's cold enough and doesn't moan about it then it must be fine.
Do you have any experience with that r134 sub zero synthetic? It's in a silver can with a polar bear on it. It says it'll cool up 18% more than other refrigerants. At Big R, which is like a Tractor Supply, they want $12.99 a can which is $5 more than Johnson or National. Johnson and National are the only ones around here that are made in the US and don't have any leak stop and dye. I didn't figure it would make it 18% colder. There's also CarPro which claims to be the #1 coldest refrigerant. I'm temped to try the Sub Zero or CarPro in my truck just to see if there's a difference. I personally don't see it being any colder.
I'd like to buy a 30 lb tank to have on hand. It would just make filling easier for me. With the cans I always weigh it full, empty it in the system, and then weigh it empty. They all claimed 12 ounces of refrigerant in the can. Two had 11 ounces, one had 10 ounces, and the last on had 10.7 ounces. The scale I have claims to be accurate within .02 ounces.
What brand of refrigerants do you guys use? I would think DuPont would be pretty common with shops. I can get Johnson for a $120 although I have seen it on sale for $80. National is also $120. Dupont is I think $150 at Orielly's.
If I bought a 30# cylinder I'd have enough to probably last me a lifetime unless I used it on my family and friend's cars too.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 26, 2013, 10:37 AM
Post #30 of 37
(1426 views)
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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Nobody is complaining so you won!
Snake oil refrigerant claims - bull. If one really did 18% better than pure 134a don't you think the car makers would jump all over it and probably just reduce size and ability of components and save a ton?
You gotta love the Polar bear or icicles they put on the products.
Now, they do make a synthetic non hygroscopic oil that is supposed to be one and all. Polymax meant for 134a and don't trust that either but have not tried it.
Near certain the next gas that will retrofit 134a and be OE will be what is called 152a. Good range, caloric value and apparently will move PAG oils just fine. Never tried that and won't either in vehicles built for 134a.
I'm not thrilled you found your 12oz containers not right on the mark! I've found some empty but the rest was right on by postal scale down to some micro fraction of an oz.
I haven't bought refrigerant in ages and still have plenty. Wholesale clubs here will move out seasonal stuff out of state which costs even the other places and frequently do serious price reductions if at a loss perhaps to get it out of the way. That's a MA problem as storage is nasty expensive.
Back to top - If the wife is happy you can't do much better than that!
Tom
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 26, 2013, 11:07 AM
Post #31 of 37
(1423 views)
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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The next refrigerant to be used as OEM will be R1234yf and there will be no retrofitting. R134a isn't going anywhere.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Aug 26, 2013, 11:08 AM)
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Tom Greenleaf
Ultimate Carjunky
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Aug 26, 2013, 11:31 AM
Post #32 of 37
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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OK - wasn't sure a final decision was made. My buddy John Hess quit watching the world events on refrigerants once CO2 was seriously in the running but insane pressures needed as we know.
No fast and accurate info on it. 152a is just the nickname as is that 1234yf which may be mostly something or even 152a with a blend to raise flash point?? Plead not sure what the idiots are up to,
T
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Hammer Time
Ultimate Carjunky
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Aug 26, 2013, 12:06 PM
Post #33 of 37
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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http://sandyblogs.com/...ptOct-2012-web-F.pdf
I read that the new recovery machines will be required to have an identifier and if the car is contaminated at all, it cannot be recovered. the machine will lock you out.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Aug 26, 2013, 12:07 PM)
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Tom Greenleaf
Ultimate Carjunky
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Aug 26, 2013, 3:01 PM
Post #34 of 37
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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As usual with threads with MG we go out there. The shop I still deal with had the nicest workstation going. Could do both 12 or 134a in same machine, a S/O just tell it what to do and off it went and refilled to the gram or beeped if anything was going wrong but didn't know contamination! Had to have had that "cryo-silane" stuff in it that turns to like glass when exposed.
It killed it $10,000 bucks all clogged to crap AND sucker lost a whole 50llb purchased tank full of recovered 12. Dealer was nice and gave them another at a wild discount when machine just wouldn't do crap anymore. They offered me the whole thing for FREE knowing it needed thousands according to S/O to make it work again. It wasn't fixed.
Talk about a bad time and losing your shirt! They gave up anything A/C that dealt with refrigerant for quite a while and now do just 134a and haven't studied the new/used thing at all yet.
Any question on why shops need some bucks to do this crap?
Ha............. T
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MarineGrunt
Enthusiast
Aug 27, 2013, 1:36 PM
Post #35 of 37
(1397 views)
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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Seems like the more environmentally friendly it is the crappier it is. Then again, with technology who knows.
Awhile back I had an a/c thread going and I brought up Enviro-Safe. Enviro-Safe is made or at least bottled in a town about 45 minutes from me. I know there are numerous people in Central IL that use the stuff in both their vehicles and their home a/c unit. I went in there last year just to check it out. They really throw a sales pitch at you. They say it's compatible with any refrigerant and that you also don't have to get any moisture out of the system. I'm guessing they say this because they know most don't have a vacuum pump. If you needed to vacuum most people wouldn't buy the stuff and just take it to or call a tech. I remember HT saying how dangerous it was because of it being mainly butane or propane (can't remember which) and you'd pretty much be driving around in a bomb.
Here's a short video of the local news talking about Enviro-Safe. And HT thinks he knows what he's talking about...
http://www.youtube.com/watch?v=7X7ddGwpqfY
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 27, 2013, 1:40 PM
Post #36 of 37
(1396 views)
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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Just think, the top of your car could have been blown off just like that building.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 27, 2013, 1:56 PM
Post #37 of 37
(1394 views)
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Re: 2005 GMC Envoy 4X4 4.2L Expansion Tube?
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There's a gas that makes an excellent refrigerant and used all the time. I won't post its name on the open web but send MG a PM,
T
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