High side would have to be behind condenser-- would not work IMO because of the restriction in the port causing an orifice effect. There are vehicles that use solenoids-- for rear systems- but only in foreign countries that I know of...Delica van comes to mind-- I would not concern myself with them....

All 3 o-rings are the same size- believe me- I worked in the factory that assembled those compressors...

treat it like a rear system- like in a van, or suburban- they have a liquid line split prior to expansion device for the front- then run a line to another rear evaporator, then return back to the intake of the compressor. 2nd evaporator uses an expansion valve (TXV)

Pungent smell is usually flushing agent that never got removed fro the system-- which is a degreaser and totally detrimental to the system-- this is why I never put anything in the system other than oil or refrigerant-- If I flush, I use refrigerant flushing adapters on my recovery machine.

Always lube o-ring and seal interior with mineral oil- I use "mechanics" torque on thru-bolts- too loose is bad- too tight, and you can break the bolt- or sometimes strip the threads- but as I remember- 20 Nm comes to mind....just have to have a feel for it-- after about the first 500 I di...

use the thickest o-ring on H-6s-- use an awl to pull out snap rings- My seal puller works on new seals= but is is a factory made tool with a 2 inch twister knob...

It uses Passlock II system- chip is in the tumbler- not the key-- so I usually just bypass them when they act up by buying a GMATTI bypass module off Ebay for $14- instructions are for using when remote starting, but I wire them to be used constantly (permanently ground it- instead of only on remote...

My 94 Astro has 374,000 on it- I've seen quite a lot of astro issues-- next time it won't start -- have someone crank it while you lay under gas tank and whaaaaap the tank with your fist several times-- this will kick into action a stalled fuel pump- and also let you know that it IS the issue-- I've...

Mist the condenser with a garden hose- if pressures come down , you have an air flow across the condenser issue- as in blockage or bad fan or fan clutch.

If compressor is tight to turn by hand and belt is tight-- look out - it is seizing- as in locking up prpobably due to lack of lube from running on too low a refrigerant charge. Refrigerant oil does not travel well with loss of refrigerant- and can cause internal compressor damage. If compressor tur...