(2) The POA valve needs to be adjusted so the pressure in the evaporator is correct to keep r134a near freezing. The result is less cooling capacity, leading to higher temperatures out of the vent. When using an R12 TXV with R134a, the evaporator will not be fully utilized because the refrigerant will be superheated more than necessary. Most replacement TX valves are already setup for 134a, but if you have an original TX valve you should replace it. (1) The expansion valve (TX valve) needs to be appropriate for 134a due to different superheat temperature needs. There are a few important thing to consider when using the factory AC and 134a The system and it's operation are fairly simple, but there are some pitfalls even if the components are in good working order. I'm a mechanical engineer who studies heat transfer / heat pump / AC systems and this factory AC system design and operation fascinates me quite a bit. I'm happy to answer any questions you have. I'm going to copy-paste some useful information below regarding how to get the factory system working well, since I have gone through this on my '70. Many folks swap them out for a newer Sanden compressor which will also work. They are enormous and heavy, but also known to be relatively bullet proof. There is no guarantee that the numbers are complete or accurate, therefore, we cannot accept any liability or responsibility for damages incurred from the use of this information.The original compressor is a Frigidaire A6. The numbers have been compiled from many sources to make these pages as correct as possible. The Cowl Trim Tag, located on the cowl area identifies significant information about your car.Ĭlick here for further cowl tag decoding information Line 1: Year, GM Division, Model & Body, Assembly Plant, Sequence Numberħ51 = Black Knit Vinyl Bench or Buckets (Standard)ħ52 = Black Sport Cloth Bench of Buckets (Custom)ħ54 = Black Perforated Vinyl Buckets (Custom)ħ63 = Neutral Knit Vinyl Buckets (Standard)ħ67 = Chamois Knit Vinyl Bench (Standard)ħ71 = Neutral Perforated Vinyl Buckets (Custom) Special wheel, hub cap and trim ring (Rally wheel)Ĭolor combination two-tone – dark blue / whiteĬolor combination two-tone – light green / whiteĬolor combination two-tone – green gold / whiteĬolor combination two-tone – light yellow / whiteĬolor combination two-tone – chamois / whiteĬolor combination two-tone – med orange / whiteġ973 Nova Cowl Tag Info 1973 Nova Example Cowl Tag & Breakdown Special performance front & rear suspensionįront compartment console instrument cluster Special heavy duty front & rear suspension L48 – Turbo-Fire 350 | 350ci | 175hp V8ġ973 Nova Engine Codes & Specs Available Engine SpecificationsĬlick here for further engine decoding information 1973 Nova Transmission CodesĬlick here for further transmission decoding information 1973 Nova Rear Axle Ratio CodeĬlick here for further rear axle decoding information 1973 Nova Factory Options Regular Production Option (RPO).1973 Nova Model Options Body Style & Model Options:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |