Ac/serpentine belt question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JayDubBlazer · 12-23-2004, 10:02 PM

I just got the seerpentine belt assbl of a truck. I also got the ac compressor with it. What is the difference between the new pump and the one that is currently on my 72. Is it a total differnt system. I don't use my A/C because I never have my top on but wound like to have it look like it would work. An possible down the road use it.

**kwmech** · 12-23-2004, 11:37 PM

Depending on the year, the compressor may have had r134a refrigerant in it. You may also have to have a couple of lines made up. Less oil. Other than that it should work just fine.

OhioDan · 12-24-2004, 04:40 AM

If I'm not mistaken, with the serpentine belt setup, your water pump will turn backwards? If it does, you'll have to get a water pump that works with a serpentine belt setup. Just my $.02 .

neonlarry · 12-24-2004, 04:34 PM

Like was said above it depends on year. Mine was marked right on the compressor R12.
If its an R12 setup it will work fine just might need to have new hoses made. If it is an R134a you can by a conversion kitto switch your system to R134a.

Blue68 · 12-24-2004, 05:31 PM

A reverse rotation pump would also mean reverse rotation fan. Also, the fan depth will probably be different than your current shroud.

neonlarry · 12-24-2004, 06:04 PM

Kinda sounded like he got the whole setup. But yes fan depth is a problem, BB fan shroud will solve that nicely.

JayDubBlazer · 12-24-2004, 07:17 PM

the fan is taken care of switching to electic that is why I wanted to get the new alternator with the higher amps. I am looking for the water pump. I want to get the cast aluminum one so it doesn't rust. The one at the juck yard was all rusty.

JayDubBlazer · 12-24-2004, 07:21 PM

oh also where can you find the conversion kit? Is it expensive? If so the pump might just be there for show.

neonlarry · 12-25-2004, 12:15 PM

Here are a couple of old posts that have some good info on converting:
http://67-72chevytrucks.com/vboard/s....php3?t=112463
http://67-72chevytrucks.com/vboard/s....php3?t=113552

JayDubBlazer · 12-25-2004, 04:13 PM

Thanks larry, that is just what i needed.
My synopsis - I can have it looked like it is hooked up without ever changing it over to a 134 system, as ;omg as i don't use though it shouldn't hurt it anyway. And do the change over when I am ready, or more than likely can afford it.

12-23-2004, 10:02 PM	#1
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,883	Ac/serpentine belt question I just got the seerpentine belt assbl of a truck. I also got the ac compressor with it. What is the difference between the new pump and the one that is currently on my 72. Is it a total differnt system. I don't use my A/C because I never have my top on but wound like to have it look like it would work. An possible down the road use it. __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

12-24-2004, 04:40 AM	#3
OhioDan Registered User Join Date: Apr 2002 Location: New Carlisle, Ohio,USA Posts: 1,404	If I'm not mistaken, with the serpentine belt setup, your water pump will turn backwards? If it does, you'll have to get a water pump that works with a serpentine belt setup. Just my $.02 . __________________ LIFE AIN'T EASY WHEN YER FAT AND GREASY! GMC= Got More Class! 1970 GMC LWB, Fleetside, 350/4spd, Flowmaster "40's", 2002 GMC 16" Rallies, cowl hood,and added a bunch of options that weren't there when I started.

12-24-2004, 04:34 PM	#4
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Like was said above it depends on year. Mine was marked right on the compressor R12. If its an R12 setup it will work fine just might need to have new hoses made. If it is an R134a you can by a conversion kitto switch your system to R134a. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

12-24-2004, 05:31 PM	#5
Blue68 Registered User Join Date: Apr 2000 Location: Frisco, Tx, USA Posts: 606	A reverse rotation pump would also mean reverse rotation fan. Also, the fan depth will probably be different than your current shroud. __________________ http://home.comcast.net/~r.landrum/w...tos.html-.html '68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.

12-24-2004, 06:04 PM	#6
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Kinda sounded like he got the whole setup. But yes fan depth is a problem, BB fan shroud will solve that nicely. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

12-23-2004, 11:37 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,628	Depending on the year, the compressor may have had r134a refrigerant in it. You may also have to have a couple of lines made up. Less oil. Other than that it should work just fine.

12-24-2004, 07:17 PM	#7
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,883	the fan is taken care of switching to electic that is why I wanted to get the new alternator with the higher amps. I am looking for the water pump. I want to get the cast aluminum one so it doesn't rust. The one at the juck yard was all rusty. __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

12-24-2004, 07:21 PM	#8
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,883	oh also where can you find the conversion kit? Is it expensive? If so the pump might just be there for show. __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

12-25-2004, 12:15 PM	#9
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Here are a couple of old posts that have some good info on converting: http://67-72chevytrucks.com/vboard/s....php3?t=112463 http://67-72chevytrucks.com/vboard/s....php3?t=113552 __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

12-25-2004, 04:13 PM	#10
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,883	Thanks larry, that is just what i needed. My synopsis - I can have it looked like it is hooked up without ever changing it over to a 134 system, as ;omg as i don't use though it shouldn't hurt it anyway. And do the change over when I am ready, or more than likely can afford it. __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

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