A/C Is working! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

smokekiki · 08-09-2005, 05:20 PM

I just rebuilt the a/c in my 71 suburban.I replaced all the hose,which is about 25' long.I replaced the compresser,and drier.Pulled the condensor off,and the evaperater off the roof and flushed them real good.Put it all back together with new orings,put in 12oz off ester oil,pulled a 4 hour vacuume.When i saw the vac held without dropping,I filled it with 80oz of r134a.I was getting vent temps of 46 and pressures of 325 high and 35 low.Put on a new fan clutch,dropped the vent temp to 40 and pressure to 295 and 28.That was with the ambient temp of 94 degrees.

*newin72* · 08-09-2005, 05:44 PM

sweet. how much did all that run ya? I need to do the same

smokekiki · 08-09-2005, 05:52 PM

Pretty close to $400.00.Plus I bought an a/c vacuume pump for $138.00.I had gauges.I got the pump,and drier at napa.The compressor,hoses,oil and orings from ackits.com,and the hose clamps from McMaster-Carr.It is recomended to not use worm drive clamps.I sanded the ridges off the stock hose barbs so they don't cut the barrier hose.Look at www.mcmaster.com part # 5443k16

bagged91 · 08-09-2005, 10:29 PM

Hey Mike!SWEET!

I was wondering how you made out with it! Did you get it ready for Carlilse? Is that 40 degree's at the front, middle or rear vents? I'm gettin' a chill just thinking about 40 deg a/c in a burb.

L8R - Joe

smokekiki · 08-10-2005, 08:13 AM

Yes,I had it ready for Carlisle.It didn't make it the whole way though!

Fuel pump took a crap.Luckly I was right near the Reading exit,and a guy I went to school with has a towing business a couple miles from there.He towed me home,and we jumped in the van and still made it up to Carlisle.
The truck is back running,and the a/c is working even better now that the temps dropped a little.The 40 was at the rear.But it gets cold enough that I can turn the blower down after it cools off.

bagged91 · 08-10-2005, 06:09 PM

Sorry to hear the "trouble" on the way there. I didn't get out of my driveway, had some unexpected stuff come up which cancelled my plans.

I will hopefully be getting into my underdash A/C soon.

L8R - Joe

JimKshortstep4x4 · 08-28-2005, 06:14 AM

smokekiki,

That is great news on the AC!

We are going to be putting my son's 72 Burb system back in over the winter and your success with R-134 is encouraging. It is the two section system.

I have a couple of questions on your system: 1) Does it have the POA setup,
and 2) Is the compressor the original style?

TIA,

Jim

smokekiki · 08-28-2005, 09:10 PM

No,it is the tunnel style with a unit in the rear only.It has 2 tvx valves.Yes it has the original style compressor.They work well with r134's high head pressures.I also have a 72 that I am going to rebuild the a/c system on.It has a poa set-up.The poa can be adjusted for r134.Check out www.autoacforum.com Do a search under poa valves.Lots of good info.The forum is connected to a/ckits.com.That is were I got my hoses.They were cheaper than anyone local,even with shipping.

JimKshortstep4x4 · 08-29-2005, 07:54 AM

smokekiki,

Thanks for the information.

I have the link to the site and have tried out the test/adjustment of the POA valve. Very good information!

Do you see any problems using the POA valve with the R-134?

We have all of the hoses made up already and have eliminated all barb connections.

Jim

smokekiki · 08-29-2005, 08:13 AM

No,I don't.The Guy that came up with the adjustments said he was getting lower temps with the adjusted poa than he was with a poa eliminater.Others did the same thing with the same results.

JimKshortstep4x4 · 08-29-2005, 08:22 PM

smokekiki,

That is good to hear on the POA valve, thanks a lot!

Jim

08-09-2005, 05:20 PM	#1
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,473	A/C Is working! I just rebuilt the a/c in my 71 suburban.I replaced all the hose,which is about 25' long.I replaced the compresser,and drier.Pulled the condensor off,and the evaperater off the roof and flushed them real good.Put it all back together with new orings,put in 12oz off ester oil,pulled a 4 hour vacuume.When i saw the vac held without dropping,I filled it with 80oz of r134a.I was getting vent temps of 46 and pressures of 325 high and 35 low.Put on a new fan clutch,dropped the vent temp to 40 and pressure to 295 and 28.That was with the ambient temp of 94 degrees. __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires

08-09-2005, 05:52 PM	#3
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,473	Pretty close to $400.00.Plus I bought an a/c vacuume pump for $138.00.I had gauges.I got the pump,and drier at napa.The compressor,hoses,oil and orings from ackits.com,and the hose clamps from McMaster-Carr.It is recomended to not use worm drive clamps.I sanded the ridges off the stock hose barbs so they don't cut the barrier hose.Look at www.mcmaster.com part # 5443k16 __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires Last edited by smokekiki; 08-09-2005 at 05:55 PM.

08-09-2005, 10:29 PM	#4
bagged91 Out draggin' Join Date: Jan 2004 Location: Pitman,NJ Posts: 1,574	Hey Mike!SWEET! I was wondering how you made out with it! Did you get it ready for Carlilse? Is that 40 degree's at the front, middle or rear vents? I'm gettin' a chill just thinking about 40 deg a/c in a burb. L8R - Joe __________________ 91 GMC Xcab LB-Bags/bd/caddy clip SOLD 72 C10 Cheyenne Super LWB SOLD 92 GMC K1500 Burb 72 C10 Burb (ex. Cheesewagon)SOLD 72 C20 Burb parts truck 71 C10 Burb "project"

08-10-2005, 08:13 AM	#5
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,473	Yes,I had it ready for Carlisle.It didn't make it the whole way though! Fuel pump took a crap.Luckly I was right near the Reading exit,and a guy I went to school with has a towing business a couple miles from there.He towed me home,and we jumped in the van and still made it up to Carlisle. The truck is back running,and the a/c is working even better now that the temps dropped a little.The 40 was at the rear.But it gets cold enough that I can turn the blower down after it cools off. __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires

08-10-2005, 06:09 PM	#6
bagged91 Out draggin' Join Date: Jan 2004 Location: Pitman,NJ Posts: 1,574	Sorry to hear the "trouble" on the way there. I didn't get out of my driveway, had some unexpected stuff come up which cancelled my plans. I will hopefully be getting into my underdash A/C soon. L8R - Joe __________________ 91 GMC Xcab LB-Bags/bd/caddy clip SOLD 72 C10 Cheyenne Super LWB SOLD 92 GMC K1500 Burb 72 C10 Burb (ex. Cheesewagon)SOLD 72 C20 Burb parts truck 71 C10 Burb "project"

08-09-2005, 05:44 PM	#2
newin72 Account Suspended Join Date: May 2005 Location: East Texas Posts: 545	sweet. how much did all that run ya? I need to do the same

08-28-2005, 06:14 AM	#7
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	smokekiki, That is great news on the AC! We are going to be putting my son's 72 Burb system back in over the winter and your success with R-134 is encouraging. It is the two section system. I have a couple of questions on your system: 1) Does it have the POA setup, and 2) Is the compressor the original style? TIA, Jim

08-28-2005, 09:10 PM	#8
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,473	No,it is the tunnel style with a unit in the rear only.It has 2 tvx valves.Yes it has the original style compressor.They work well with r134's high head pressures.I also have a 72 that I am going to rebuild the a/c system on.It has a poa set-up.The poa can be adjusted for r134.Check out www.autoacforum.com Do a search under poa valves.Lots of good info.The forum is connected to a/ckits.com.That is were I got my hoses.They were cheaper than anyone local,even with shipping. __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires

08-29-2005, 07:54 AM	#9
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	smokekiki, Thanks for the information. I have the link to the site and have tried out the test/adjustment of the POA valve. Very good information! Do you see any problems using the POA valve with the R-134? We have all of the hoses made up already and have eliminated all barb connections. Jim

08-29-2005, 08:13 AM	#10
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,473	No,I don't.The Guy that came up with the adjustments said he was getting lower temps with the adjusted poa than he was with a poa eliminater.Others did the same thing with the same results. __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires

08-29-2005, 08:22 PM	#11
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	smokekiki, That is good to hear on the POA valve, thanks a lot! Jim



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.