Sorry, its a work of love, and more of a restoration. A/C and cooling system tests were my favorite at work. The balance required to operate two systems off one pump makes this a very interesting problem, throw in a gas change and it makes you really think about what is happening inside the...
PS, after 38 years as a professional tech, the last 20 with the Caterpillar Proving Grounds in Green Vallet Az,NOTHING gets slapped together. I will let you know what I find
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C/o parts is not a problem, this is my retireme nt truck, I don't think I mentioned it there are not very many old parts left on this truck, bumper to bumper I think the steering box is yet to be changed but not much more. Everything i found online said 72 ounces of r 12, so i put in 60...
Factory1986 suburban w/rear ac, had poorly working r12, replacedr4 compressor, replaced evaporator , replaced rec/dryer ,replaced orifice tube with non varible, high ambient(105f and above)replaced every oring front to rear, replaced dual line from compressor to condenser and to evaporator. New...
Morning 85-90 degrees, dual elec fans(condensor) plus new flex fan on engine, low side 35-40 high side 225-250, while charging, rec/dryer is cold, after charging rec/dryer gets warm, rear air works, the only old part left is rear expansion valve, will remove valve and see if its stuck open
The only part not replaced is the expan valve, if it is stuck wide open, pressure will take the path of least resistance and go thru the expan valve instead of a good flow to the new orifice up front. What do ya think?
1986 suburban, the list is exhaustive
400 horse small block, summit 202,160 heads, headers, msd, comp cam(268h)
4l80e trans/compushift computer (lots of work)
12 bolt posi( eaton new gear unit)
Derale trans cooler
4 row core alum rad
All new suspension w/ air bags in rear
Leather buckets
Sound...