AC Rebuild Input please-condenser yes or no

[Reega]

Finally under vacuum tonight. First pump with clean oil only pulled 25-27. Thought it was the HF gauge set. Got a loaner and also said 25. Even though the rental pump from Oreilly looked great with new oil, it wouldn’t pull more than that. Second gauge set confirmed. 2nd rental pump from AZ got me to 28-29 ish, also supplied with new oil. 1st pull

 

[Reega]

Second set-up

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[1998_K1500_Sub]

So the Reach didn’t look like the picture, but it fit in the factory mounts.

I had the same problem. I filled that void between the radiator support and the condenser so as to promote airflow through the condenser (instead of around it). I used a piece I cut from an aluminum sheet I had lying around.

Finally under vacuum tonight. <snip> 2nd rental pump from AZ got me to 28-29 ish, also supplied with new oil. 1st pull

What's your elevation? You'll get nearly 30" (29.9" reportedly) at sea level and lose about 1" for every 1000' of elevation (that approximation's only good to about 6000 or 7000 thousand feed). If there's a hurricane nearby, then less. If you're in Death Valley, then more.

Atmospheric Pressure vs. Elevation above Sea Level

Elevation above sea level - in feet and meter - with barometric and atmospheric pressure - <i>inches mercury, psia, kg/cm² and kPa</i>.

www.engineeringtoolbox.com

 

[L31MaxExpress]

Another thing pertaining to gauge sets. Most are not correctly zero'd to start with. Even changes in ambient pressure can make one need to re-zero the gauges.

 

[Reega]

I had the same problem. I filled that void between the radiator support and the condenser so as to promote airflow through the condenser (instead of around it). I used a piece I cut from an aluminum sheet I had lying around.





What's your elevation? You'll get nearly 30" (29.9" reportedly) at sea level and lose about 1" for every 1000' of elevation (that approximation's only good to about 6000 or 7000 thousand feed). If there's a hurricane nearby, then less. If you're in Death Valley, then more.

Atmospheric Pressure vs. Elevation above Sea Level

Elevation above sea level - in feet and meter - with barometric and atmospheric pressure - <i>inches mercury, psia, kg/cm² and kPa</i>.

www.engineeringtoolbox.com

Right at 1000 feet, I’m happy with where the second pump pulled it to. Gonna let it sit another day and call it good.

 

[Reega]

Another thing pertaining to gauge sets. Most are not correctly zero'd to start with. Even changes in ambient pressure can make one need to re-zero the gauges.

L31, would you care to share your calibration method?