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I haven't heard of anyone swapping out just the compressor clutch and getting good results. Maybe I'll swap the clutch out first before I get a whole new compressor.
I replaced the expansion valve in the back and the rear AC blows cold again.
If the lines to the rear were damaged the whole ac would empty-but expansion valve like you said,is probably clogged.That one is easy. The expansion valve in the rear is either plugged up with crap or otherwise stuck closed or potentially even the lines under the truck are damaged or have become obstructed internally. Either way its a restriction in the rear refrigerant loop.
On a system that has an orifice tube up front and an expansion valve in the rear, if the refrigerant level is low, the expansion valve will open fully, hog all the refrigerant flow and the rear will be ice cold while the front is warm. Tahoes do not have rear heat, so there are no blend doors to act up.
Mine is on 1700g(59oz) in a tahoe,and pressures remained healthy-12 oz is way too low. Rear takes a while to cool down even with healthy acI added three 12oz cans and stopped there because the low pressure gauge was at 75psi and the high was at 225-230psi. I didn't want to overfill or cause damage.
I've read on a few posts that these trucks with rear air require 64 oz of refrigerant and that's what I was planning to put in until I saw the low pressure going that high since every video that I've watched always says to keep the low pressure under 50psi.
Yes the sensing bulb was well attached and I attached the new one the same way again.OP, was the new TXV’s sensing bulb properly attached to the evaporator’s low pressure pipe? IIRC a spring steel clip is used to hold the two together.
If that bulb isn’t in contact with the pipe it’ll flow excessively.
You might check rockauto I believe its quite a bit cheaper for the same compressor plus they provide a 5% discount code on the forum.I will try the pihnching the line in the rear trick. I was also looking at this Delphi CS0120 since I need to spend some amazon credits.
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