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Alfa 164 NAPA Low and high conversion fittings R12 to R134

Use NAPA 409903 FOR LOW PRESSURE side at POA valve
Use NAPA 409902 FOR HIGH PRESSURE side at receiver dryer
 

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Well, I disagree about using PAG oil in retrofit and Polarbear feels same way I do read this: http://www.polarbearinc.com/Trouble11_charging.htm

I use Ester 100 http://www.polarbearinc.com/PBPC/homepage/products_Chem2.html

And yes 4.6 oz for whole system with expansion valve like 164 has.

As for using PAG oil if you remove compressor invert and drain all mineral oil out and flush out sytem OK if not use Ester oil.

See these steps http://www.sanden.com/support/RETRO.html from Sanden site Jason posted flow chart from yes it calls for PAG oil after you have drained compressor, lines and discarded old receiver dryer. Let your own judgement be your guide on the PAG vs Ester issue. But I like to error on the Ester side since I doubt you can get all the mineral oil out without full system flush.

As for question on NAPA fittings yes I would remove R12 fitting valve cores first as new fitting have valve cores and thread sealant.
 

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.

If you encounter stop and go or and accident/road construction the vent temps climb to the low to mid 50's. With a black car and dark interior with tinted windows it could be 120-140 degrees inside the car by mid day. It will take the S about 5 minutes to get the car comfortable.
This is why I added my "Florida" manual override switch to turn on high speed fan relay. I had to find a way to cool my car quicker after it sat in parking lot at work all day and then crawling through rush hour traffic on the way home.

My son has taken it a step farther on his two 164s in that he installed a three postion switch and can engage either low or high speed fan relays.

Even here in VA it is hot and humid and being able to run fan helps a/c get cooling faster and controls engine temp in stop and go traffic.
 

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I have done that too in the past or when resister is bad but you can't get fan to start until freon pressure builds up to about 200-215 psi that way.
 
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