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A/C Compressor Puzzle

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Old Jan 12, 2022 | 08:50 PM
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Any of y'all with DENSO 471 7005 compressors, does it have a plate on the back that specifies ND8 oil?
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Old Jan 13, 2022 | 06:39 PM
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Originally Posted by 318SixPack
Condensers: Is there any advantage to serpentine over parallel flow, besides price?
For R134a refrigerant you need a parallel-flow condenser or you will lose considerable cooling capacity. Serpentine condensers are for old R12a systems.
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Old Jan 13, 2022 | 06:52 PM
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Originally Posted by Rambler65
For R134a refrigerant you need a parallel-flow condenser or you will lose considerable cooling capacity. Serpentine condensers are for old R12a systems.
Thanks!
I'm going with Mopar Replacement from Summitt for that.
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Old Jan 13, 2022 | 07:17 PM
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Originally Posted by 318SixPack
Thanks!
I'm going with Mopar Replacement from Summitt for that.
While in there make sure your condenser fan is in good condition as well. If that stops working you'll have poor cooling at low speed and at idle. (I have that problem on my daily driver but that fan is such a PITA to get to on that vehicle I just live with it.)
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Old Jan 13, 2022 | 07:46 PM
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Originally Posted by Rambler65
While in there make sure your condenser fan is in good condition as well. If that stops working you'll have poor cooling at low speed and at idle. (I have that problem on my daily driver but that fan is such a PITA to get to on that vehicle I just live with it.)
brand new one is in
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Old Jan 14, 2022 | 07:54 AM
  #21  
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After a tedious email exchange with a Denso Engineer, I am going to wait until I have the compressor in hand before getting PAG oil.
The reference I found for oil on the Denso websites was for Europe, and stated that all Denso R134a compressors use Denso ND8 Pag Oil, a PAG 46 oil. They also said something like 75% of their compressor returns are due to incorrect oil.
When I inquired, the Engineer came back and told me the compressor comes with 4.5 oz, and it needs to be drained to between 2 and 2.5 oz left in the unit before installing. No mention of what viscosity.
After a few more rounds he said it uses PAG 100, and later attached a chart I'd seen before that said it comes with SP15 and claimed that was PAG 100 oil.
https://wranglertjforum.com/attachme...art-pdf.88471/

Now, I could me misinterpreting this, but Saden says SP-15 is 80, although the SP-20 was 100 it was replaced by SP-15
https://www.sanden.com/oilspecs.html

So, better safe than sorry, will wait until after I get it and see if the tag lists the oil.
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