Hi all. Does anyone have procedures or pressure charts for the LS430's air conditioning system? I suspect my 2002 is low since I've been hearing whispers out of the driver's side vent and also sometimes gurgling sounds from the passenger's footwell area only when the AC is on. Sight glass shows lots of bubbles. Records show no mention of AC work, so hopefully it's just slightly low from age and diffusion through the hoses over the years.

I need to get a copy of the big manual books for this car, but I was able to find PDFs on the internet for the LX470 (attached), which I assume is very similar operation as also of same vintage. Pressures seem OK on my car comparing with the LX's chart, but that 2UZ engine has a direct-drive fan that revs up when you're testing at 1,500 rpm and I know from previous experience that airflow on the condenser makes a considerable difference on high side pressures. Maybe I should just put a box fan on the front of the car and also of course rev up to constant speed before testing again.

 

With the sight glass you can add freon till the bubbles go away without gauges.