Boost your trucks A/C in 20 minutes.

[Edahall]

The fan out of my 1990 Suburban quit one day so I put in a fan out of junkyard 1999 Tahoe. To be honest, I notice no difference.

[Malo83]

Any updates on this thinking of switching out my tired old fan.

[Edahall]

Originally Posted by Malo83

Any updates on this thinking of switching out my tired old fan.

Yes, if you want more A/C output, ditch that r134a refrigerant and switch back to r12 or better yet r290. I've got my A/C set up to freeze you out even when it's 100 degrees out here in Southern Texas.

[Malo83]

Originally Posted by Edahall

Yes, if you want more A/C output, ditch that r134a refrigerant and switch back to r12 or better yet r290. I've got my A/C set up to freeze you out even when it's 100 degrees out here in Southern Texas.

Still running the R12

[Malo83]

Changed out the old blower with the new and ,Whala! the new blower pushes more air! probably cause it's a new blower or whatever, but i'm getting more air than before

[hatzie]

HC refrigerants R290 & R600a can be used as an R12 replacement but getting a proper charge is different from CFC refrigerants.
The nature of government agencies like the EPA are valid considerations...
This is Jungle Eddy's post on the Aircondition.com forum. That BBS may still be available via the wayback machine.
http://67-72chevytrucks.com/vboard/s...48&postcount=6

[69chevytrucker]

that fan will fit on a 69 as well there all the same i got a 69 and put the fan from a 85 bolted right up

[Malo83]

Looking for some Freeze 12

[Harley03joe]

Will VDO Blower Motor PM129 Work In A 71 C20 A/C
Thank You
Harley03joe

[Harley03joe]

Originally Posted by Edahall

Yes, if you want more A/C output, ditch that r134a refrigerant and switch back to r12 or better yet r290. I've got my A/C set up to freeze you out even when it's 100 degrees out here in Southern Texas.

Hi Sorry Im Late But Question About The R290 Freon
My 71 Truck Was R12 Then Went To R134 With The R134 Oil,, The Question Is This Do I Have To Put Different Oil In It Or Would The R134 Oil Be Ok ??
And How Much R290 Do I Put In It ? > Till The Dryer Glass Runs Clear ?
Thank You For The Answer
Harley03joe

[Harley03joe]

Originally Posted by Malo83

Looking for some Freeze 12

Good Luck

[hatzie]

Originally Posted by Malo83

Looking for some Freeze 12

Envirosafe is still available but not Freeze 12.

Originally Posted by Harley03joe

Hi Sorry Im Late But Question About The R290 Freon
My 71 Truck Was R12 Then Went To R134 With The R134 Oil,, The Question Is This Do I Have To Put Different Oil In It Or Would The R134 Oil Be Ok ??
And How Much R290 Do I Put In It ? > Till The Dryer Glass Runs Clear ?
Thank You For The Answer
Harley03joe

R290 is not Freon it's refrigerant grade Propane. If you already converted to R134a you are going to have to make it work.
A 71 should have the big Harrison A6 compressor. That compressor combined with the huge condenser on these pickup trucks should freeze you out of the cab on Max AC even using R134a. Most folks overfill the system with oil. Overfilling with oil insulates the inside of the condenser and evaporator so you don't move as much heat. You'll have to flush the excess oil out of the evaporator and condenser, empty the compressor, then refill the compressor with the correct amount of oil, replace the dryer, vac down, and re-fill.
If your lines have a muffler you'll need to replace that section because you will not be able to flush it out.

The only refrigerant with a spec for the number of pounds to use is the original R12. For non original refrigerants don't use a scale. Follow the link I posted to the Jungle Eddy method for charging the system. This method works with any non original Hydrocarbon and DuPont "Freon" refrigerants.

[Harley03joe]

Originally Posted by hatzie

Envirosafe is still available but not Freeze 12.



R290 is not Freon it's refrigerant grade Propane. If you already converted to R134a you are going to have to make it work.
A 71 should have the big Harrison A6 compressor. That compressor combined with the huge condenser on these pickup trucks should freeze you out of the cab on Max AC even using R134a. Most folks overfill the system with oil. Overfilling with oil insulates the inside of the condenser and evaporator so you don't move as much heat. You'll have to flush the excess oil out of the evaporator and condenser, empty the compressor, then refill the compressor with the correct amount of oil, replace the dryer, vac down, and re-fill.
If your lines have a muffler you'll need to replace that section because you will not be able to flush it out.

The only refrigerant with a spec for the number of pounds to use is the original R12. For non original refrigerants don't use a scale. Follow the link I posted to the Jungle Eddy method for charging the system. This method works with any non original Hydrocarbon and DuPont "Freon" refrigerants.

Hatzie
Thank You For The Info, It Will Come In Handy, I'm Glade There Are People Like You On The Forum
Thank Again
Harley03joe