Jump to content

Need help with A/C compressor oil viscosity discrepancies


RCWD21
 Share

Recommended Posts

Hey guys, it's been a long time since I've been on here and I've got a question hopefully someone knows! 

 

Ok so my high pressure line on my ac system burst from age (and possibly an improper r12 to 134a refrigerant conversion from a previous owner). I'm taking this opportunity to retrofit a full r134a system (from a 94) in place of the clicking r12 compressor and old lines. What I'm having a hard time finding out specifically is which oil is the correct oil? Sites like rockauto and even remanned units on ebay say PAG-46 BUT online sites like 4seasons and techchoice plus are saying the oil should be PAG-100. Which should I go with? I dont want to take out a new expansion valve and possibly clog a condenser or ruin a rubber line again. 

20191212_230126.jpg

Screenshot_20191212-230229_Chrome.jpg

Link to comment
Share on other sites

This is a little connecting-the-dots, but I'd be certain it's PAG-100, too.  This is based on a few things:

  1. NTB96-023a, which is the Nissan TSB for converting from R-12 to R-134a (Link) lists 86-92 D21 as using the ZEXEL DKV-14C compressor and requiring "Nissan A/C System Oil Type R" (p/n KVH00-PAGR0), with the "R" being for rotary vane compressors.  "Type S" is for swash plate compressors.
  2. The 1994 WD21 FSM says it uses the same DKV-14C compressor and Type R oil, and also confirms that the model type is "vane rotary" (pg. HA-116)
  3. This (pg. 1, #70) and this (pg. 13) and this (under Infiniti Zekel DKV-14C) and this (as Zekel DKV) and a few others show as using PAG-100.

Notably, the Four Seasons 58440 compressor is vane-style compressor that specifically uses PAG-46 according to the 4s website.  Same seems true with other aftermarket replacements.  But at least per the internet, it seemed largely that "Zekel DKV" compressors use PAG-100. The real question now is if your 94 donor compressor is OE.

 

A few months ago I did a R-134a conversion on a 91 Land Cruiser.  Finding good information was a joke.  I eventually found a Toyota TSB that spelled most of it out, but still left me with a ton of questions.  I had to do the same stupid OEM name vs PAG-equivalent look-up, so I totally feel your pain here.

Link to comment
Share on other sites

https://ibb.co/KNj7nF5
https://ibb.co/44P131D

 

 

These are the only stickers left on the compressor. The square sticker that has all the info is long gone. From my reading it appears to be a Calsonic NVR140S but the sticker on the clutch makes me think it's a different model.

 

I'm 99% sure that the donor vehicle had factory air. 

Link to comment
Share on other sites

Hmm. Well, for what it’s worth, I saw Diesel Kiki referenced with Zekel in a few places actually, including the 4th link I provided.  Perhaps it’s the DK of DKV?

 

Pg. 8, as "DIESEL KIKI (ZEKEL)": https://usermanual.wiki/Document/ACCOMPRESSOROILCHECKING.1759211196.pdf

 

Edited by hawairish
Link to comment
Share on other sites

Well my compressor definitely matches the Calsonic NVR140S compressor. The other one looks physically different. 

 

**apparently the nvr140s and dkv-14c are the same thing? They look identical from what I can find but since the info sticker on my compressor is missing I might just go grab another unit with an intact sticker so I'll know for sure what compressor I have

 

And I've noticed the Diesel Kiki thing as well, I think they're the maker of the clutch assembly on these compressors.

Edited by RCWD21
Added info
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...