AC Reinstall

[LGAFF]

Anyone done a reinstall of AC system? Anything particular to watch for or do to ensure its leak free?

[Dynomite]

Is this Freon R12?
Is a new AC compressor involved?
To obtain R12 Freon you must be a certified AC person or sign that you will have an AC Certified Person recharge your AC System.

Get a new dryer
Clean orifice screen on high side
Add Mineral oil maybe 8 to 12 oz (R12 Freon System)
If new compressor use half bottle of oil in compressor and half bottle of oil in dryer
It will appear new compressor is full of oil but that is just to keep it lubricated during initial checks
Evacuate the AC system for 30 minutes and see if it holds vacuum (or take ZR1 down to AC certified mechanic and he will evacuate it for you and test for leaks)
Do not open up AC system after evacuation
Get paper clip to cross pressure switch (low side) so compressor will engage (engine running)
Connect can of Freon to connector on dryer
Hold Freon can upside down for a bit and then right side up
You do not want to push too much Freon in at once and lock up compressor
After a can or two the pressure switch bypass should not be needed (reconnect pressure switch to low side)
Have AC turned on all the while with engine running
Install last can of Freon and note AC running cold on lines under hood and inside car

[LGAFF]

Are the lines pretty straight forward to seal or are they temperamental?

[WVZR-1]

'90 & '91 original should have o-ring seals fitting to the compressor and '92+ I believe will have a sealing washers fitting to the compressor. Aside from that the AC lines to components are pretty straight forward.

Did you remove the AC lines and compressor or were the lines and compressor in a box of parts?

[LGAFF]

Everything was offin a box....compressor is full of oil

[Dynomite]

Everything was offin a box....compressor is full of oil
A new or rebuilt compressor will have oil in it but that is not near enough and.....there is oil flowing throughout the system.

Are the lines pretty straight forward to seal or are they temperamental?
Temperamental :-D
I say that because when you set compressor aside after plenum removal you can break the lines at the connectors to the dryer if you are not carefull :p

In terms of tightening all AC fittings for a good seal...not temperamental.

[WVZR-1]

If the compressor is OE/GM it should have a production number that could be identified. '90 production should be 1090565, '91 should be 10158100 and those would use o-ring seals if the manifold hose was OE. '92+ compressor production numbers ??? If you have a label other than the first 2 post it.

[LGAFF]

Its the 91....any idea what O Ring set? The one I got from Rock Auto did not seem correct

[WVZR-1]

Its the 91....any idea what O Ring set? The one I got from Rock Auto did not seem correct

2724674 GM 15-30169 ACD seal pkg for the originals. Many dealers would still have that number on their shelves OR they'll have an equivalent pkg that likely has both styles of seals and you pick what you like.

NAPA I believe 407130

What did RA send you?

[LGAFF]

http://www.autopartswarehouse.com/sku/GPD/A-fs-C_O-Ring_and_Gasket_Seal_Kit/GPD1321263.html

This is the set....maybe I missed something in the description.......looks generic

[LGAFF]

Possible it did not include the compressor O rings??? Maybe this is just for the lines

[WVZR-1]

http://www.autopartswarehouse.com/sku/GPD/A-fs-C_O-Ring_and_Gasket_Seal_Kit/GPD1321263.html

This is the set....maybe I missed something in the description.......looks generic

That link goes to an assortment that is ALL AC related for a multitude of applications. There's nothing application specific in that package it's just a "pick one"! Green is what I believe is used to confirm compatibility to 134a when you see "green" O-rings.

[-=Jeff=-]

here is where I buy AC parts from

http://www.discountacparts.com/

[WVZR-1]

Maybe I misunderstood and that package is what you bought from RA. I would think there's a good likely hood that what you need will be in that kit but it will be trial/error if you have that kit already.

For the compressor O-rings I'd maybe do the NAPA I mentioned or the others. An AC seal for the compressor o-ring isn't just a simple o-ring, it has multiple dimensions.

Here's a NAPA link to a correct seal that displays dimensions:

http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/A-C-Hose-Fitting-O-Ring/_/R-TEM407130_0006444478

How did you do with the electrical connector?