taeng

iTrader: (1)

Hey I've searched and couldn't find an exact amount of freon a SC400 needs. I would check under my hood, but my sticker is gone nor do I have a owners manual. If someone could check their hood and knows that would be greatly appreciated. Thanks in advance!

Rising_Sun

iTrader: (2)

Just take your car to Gazi's bros shop. He'll recharge your system for a fair price. He discharged my system and recharged my AC for less than if I did it myself.

VVT-i

Approx. 1.4 lb. If you buy the r-134 in 12 oz can you will need about 2 cans ( 1lb= 16 oz). By law you will need be certified in A/C by ASE to work on the A/C system.

narfy

my lexus spec sheet says:
92-93 uses 33.44oz +/- 1.76oz of R12 or R134a
94-95 uses 29.92oz +/- 1.76oz of R134a
96-00 uses 33.51oz +/- 1.76oz of R134a


in canada, R12 is a banned substance as it has CFC's... R134a is used as a replacement, and our shop will fill to about 90% capacity of the original R12 capacity, and replace the receiver/drier, and replace all the o-rings in the system, and drain all the existing refrigerant, and oil and replace with ND-8 oil...

mitsuguy

iTrader: (2)

We still do R-12 in a/c systems here if they originally came with it.

I do not recommend a conversion at all on our cars, especially a 92. 93 may be able to get away with it, as the condenser changed to a more r-134 friendly style, however, it seems not all 93's have this r-134 friendly condenser...

Some 134 conversions will work flawlessly forever, others will work until it gets to a certain temperature outside - the basic thing is that HCF-134 systems are designed with bigger condensers over a similar capacity R-12 system. So, when you convert an R-12 system to 134, you run out of heat transfer capability at a certain point, which will vary, depending on car...

A neat fact is that some (maybe later model) '93 Lexus' have condenser cores that closely resemble size and shape of HCF134 systems... These can be changed over successfully with 90% of the capability of the original system... However, some 93 models have the larger tubed cores and these will work, though not nearly as good as the smaller tubed cores...

I do NOT recommend doing any of this yourself at home - I have seen too many blown up a/c compressors due to overfilling of the system... A proper system will need completely evacuated and recharged with the correct amount of refrigerant. Without a proper vacuum pump, you will never get all of the system evacuated properly...

BigD026

I use interdynamics refill kit because of the 90'Degree nozzle head. I can't seem to get the others to work with the tight space.

I kept the 90'degree head & hose and just buy refill kits.

In Memphis, it was anywhere from 100-107'F everyday in August. I had about 16-20oz from the previous year(1 big can) but thought it was leaking because it would not cool my car in the 100's but it would freeze me at 85'F.
As i tried buying another refill can w/nozzle,
I leaked a ton out trying (without the 90'degree nozzle head). When i went back to use my 90'degree head & retachable hose at my apt, I bought 2 - smaller recharge cans(maybe 12oz) but didn't use the second one entirely. I still thought it was a little Weak, but the gauge was reading towards the high side. I probably filled it with 20ounces or less. It was nearly empty when i started because the straight style nozzle got hung up - allowing the Freon to drain.

I can check the actual Refill oz cans to make sure first, but I think I can drop another 12oz refill can and be around 30-32oz.(nearly fully charged). Too bad i can't test it out for another year. but it's really good to know for next Spring.

Thanks for the Info Narfy !
MemphisDave