View Full Version : A/C upgrade?
Is it possible to upgrade some or all of the A/C compoments from a newer S10 or Jimmy to get colder air out of my 94 Jimmy (r12 converted to 134a)? The air is cool but not cold. I am assuming the newer ones are 134a and they blow a lot colder. Thanks in advance.
Jongo88
08-13-10, 04:21 PM
What do you want to upgrade? The main problem with the first gen it the vents are way to small. You will never get it to blow as hard as a second gen.
The main thing you can do to get colder air is upgrade the condenser. The new ones are updated. You can also add a fan to the condenser.
That is about all you can do to it.
Jay-Sliver
08-13-10, 05:50 PM
What John said....put a pusher fan in front of the condencer if room allows for it..to try to get more air through the condencer to take the heat away from it.
Other than that, making sure the correct amount and pressure is in the system, and that the oriface tube is not plugged up with contaminates..
Jay
'94 Big Blaze
08-13-10, 05:57 PM
3rd that, my 1st gen was converted to r134 and it gets nice and cold but i still don't use it as much.
dave1182
08-13-10, 08:00 PM
a Pusher fan will help a lot, especially at Curb idle, Don't do the cheap conversion, where ppl just put in the new gas, me personally would update the condesensor and evaporator, install a new compressor and flush what lines are left, but your like most ppl including me don't have a lot of money to burn, so best thing is to Flush the system of ALL mineral (old) oil, replace the orfice tube, flush the compressor, install new Pag oil, vacume the system down recharge it with R134a and enjoy the cool/cold air.
Depending where you live and the ambient temp and humidity, and how much air moves accross the condensor will tell how cold the AC gets.
I guess my question was answered. Update the existing equipement. Are the parts from a newer S10 or are they updated parts for my 94?
dave1182
08-13-10, 10:35 PM
I guess my question was answered. Update the existing equipement. Are the parts from a newer S10 or are they updated parts for my 94?
You have a 94 right?? that's the conversition year, meaning thats when they went from r12 to r134a
dave1182
08-13-10, 10:36 PM
what connections do you have, do you have the screw on type where the hoses connect, or the quick connect?
Jongo88
08-13-10, 10:41 PM
94 has r12....
dave1182
08-13-10, 10:53 PM
I hate bastard years, my 95 has r134a system,
in that case then best thing is to blow out all the old oil, put in a variable orfice tube, PAG oil and recharge the system, those evaps and condensers will fit up to 99 i think.
My 94 came with r 12. I converted it to 134a about 4 years ago. The old r 12 would freeze me out of the car on a 95 degree day. With the 134a, it blows cool air. I might as well wind down the windows. It does not do to bad on 80 degree days. My 2002 trailblazer's A/C will freeze me out of the vehicle on a 95 degree day. I assume it is a 134a system.I know I am comparing apples and oranges, but a 134a system will blow ice cold air.
dave1182
08-13-10, 11:04 PM
My 94 came with r 12. I converted it to 134a about 4 years ago. The old r 12 would freeze me out of the car on a 95 degree day. With the 134a, it blows cool air. I might as well wind down the windows. It does not do to bad on 80 degree days. My 2002 trailblazer's A/C will freeze me out of the vehicle on a 95 degree day. I assume it is a 134a system.I know I am comparing apples and oranges, but a 134a system will blow ice cold air.
its all in the compressor speed, that was what they were pusing during the conversition years, I would invest in a compressor for a1995, and an accumulator/dryer they have the new quick connector for the 95's, you only need the low side to vacume the system down and charge from, just put the service cap on the high side when you vac the system down.
Biggest problems i'm running in to are ppl are adding oil to there systems when they don't need it, and its taking the space up for the freon.
thats why i am suggesting the compressor and dryer be replaced for a s10 95 if it is a stock system, and BLOW out all the OLD OIL remove the old office tube, blow the system out and then reinstall the o tube, and buy a o ring kit, there cheap bout 4 or 5 bucks, and since you already got the system open, repace the o rings, pre lube the rings when you put them on.
dave1182
08-13-10, 11:09 PM
Matter of fact if anyone is close to houston and needs AC work bring it to me,
Sweet. I guess I have a direction to go. I need to check prices on parts.
dave1182
08-13-10, 11:25 PM
if you need some help PM me for my number and i'll see what i can do
Thanks dave. I might do that.
One more question. I am assuming that the clutch fan is calibrated for a 195 degree thermostat. I have a 180 thermostat in my jimmy. Would this cause poor A/C performance because the fan is not coupled?
Jongo88
08-17-10, 06:27 PM
Just because you have a 180 thermostat don't mean you run at that temp. So as long as your clutch is good then you have no problems.
dave1182
08-17-10, 08:06 PM
One more question. I am assuming that the clutch fan is calibrated for a 195 degree thermostat. I have a 180 thermostat in my jimmy. Would this cause poor A/C performance because the fan is not coupled?
two different systems sorta
the amount of outside air that passes through the condensor and cools the freon (when it converts from a liquid to a gas) plays a major part on how effecent your a/c runs
when the freon goes in to your truck/cab is when it changes from a gas to a liquid, and if there are no air flow no ac and then your cussing out your ac man.
I understand whats going on with the fan. I know however that on a hot summer day, my temps barely get higher than 185. So I know I have enough to cool the engine. Some have suggested that I put an e fan on the jimmy to help with the A/C. Wouln't a recalabrated clutch fan accomplish the same thing?
dave1182
08-17-10, 08:37 PM
not really the engine fan is dependent on the speed of the engine, but an efan is more of a constant air flow, thats why some are suggesting a "pusher" fan
Jongo88
08-17-10, 08:42 PM
Add a pusher e fan to the condenser like said before. As far as I know there is no recalabrated clutch...
dave1182
08-17-10, 08:48 PM
and you can tie that Efan to run when the a/c compressor is running, its going be a constant speed and won't affect horsepower, mite actually help with the engine fan can't keep up
I had a dedicated efan and it sucked a lot of power from the alternator and it would overheat in traffic.
Jongo88
08-17-10, 08:59 PM
Well it looks like all options have been covered. Dave even offered to help you. You keep shooting everything down.
Not really. I dont want to seem pessimistic, I just want to exhaust all of the possibilities. And I do appreciate all of the replies.
Jay-Sliver
08-18-10, 10:22 PM
your going to want to make sure that the core of the condenser is clean and free of bugs, and that the fins are not all squished, restricting air flow.
Have you put a set of gauges on the AC system to make sure that the high side and low side pressures are where they need to be while the AC System is running? If you dont have the knowhow or resources to do so, a shop can.
Proper AC Refrigerant charge is critical for an AC system to operate correctly.
Jay
dave1182
08-19-10, 12:41 AM
they do have a tool that can straighten out the fins on the condensor, you can rinse the condensor down with a hose or go to a coin operated pressure washer and do it that way.
Jay-Sliver
08-19-10, 05:37 PM
they do have a tool that can straighten out the fins on the condensor, you can rinse the condensor down with a hose or go to a coin operated pressure washer and do it that way.
Believe its called a fin comb, or rad comb, or condencer comb....something along them lines.
Jay
dave1182
08-19-10, 09:09 PM
Believe its called a fin comb, or rad comb, or condencer comb....something along them lines.
Jay
http://www.napaonline.com/Search/Detail.aspx?R=NTE781110_0063281508
http://www.napaonline.com/Search/images/spacer.gif http://partimages.genpt.com/partimages/615476.jpg (http://www.napaonline.com/Search/Detail.aspx?R=NTE781110_0063281508#)
Qty http://www.s10planet.com/forum/images/btnAddItemsToList.gif
Fin Comb - Radiator & Condenser Core Tool, Clean & Straighten Condenser & Evaporator Fins Product Line: NAPA Tools & Equipment Part Number: NTE 781110 Price: Price
Unit
:
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9.99
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Availability: Available NowFeatures & Benefits Cleans & Straightens Condenser & Evaporator Fins, 6-Side Head For Different Fin Counts Per Inch Warranty 1 Year Attributes Product Application : Clean & Straighten Condenser & Evaporator Fins
Fits Fins per Inch : 8,9,10,12,14 &15
Material Safety Data Sheet There is no MSDS for this item
dave1182
08-19-10, 09:12 PM
you can use this comb on all radiators and exchangers on all cars and trucks, Thermokings.
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