AC Reinstall - ZR-1 Net Registry Forums

LGAFF · 10-17-2014

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

Dynomite · 10-17-2014

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 · 10-17-2014

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

WVZR-1 · 10-17-2014

'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 · 10-17-2014

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

Dynomite · 10-17-2014

Quote:

Originally Posted by LGAFF

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.

Quote:

Originally Posted by LGAFF

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

Temperamental

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

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

WVZR-1 · 10-17-2014

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 · 10-17-2014

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

WVZR-1 · 10-17-2014

Quote:

Originally Posted by LGAFF

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 · 10-17-2014

http://www.autopartswarehouse.com/sk...PD1321263.html

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

10-17-2014	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	AC Reinstall Anyone done a reinstall of AC system? Anything particular to watch for or do to ensure its leak free? __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

10-17-2014	#2
Dynomite Join Date: Aug 2009 Location: South Dakota/California Posts: 3,799	Re: AC Reinstall 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 __________________ Left Clickable links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 10-18-2014 at 01:33 AM.

10-17-2014	#3
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: AC Reinstall Are the lines pretty straight forward to seal or are they temperamental? __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

10-17-2014	#4
WVZR-1 Join Date: Oct 2004 Posts: 1,890	Re: AC Reinstall '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?

10-17-2014	#5
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: AC Reinstall Everything was offin a box....compressor is full of oil __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

10-17-2014	#7
WVZR-1 Join Date: Oct 2004 Posts: 1,890	Re: AC Reinstall 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.

10-17-2014	#8
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: AC Reinstall Its the 91....any idea what O Ring set? The one I got from Rock Auto did not seem correct __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

10-17-2014	#10
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: AC Reinstall http://www.autopartswarehouse.com/sk...PD1321263.html This is the set....maybe I missed something in the description.......looks generic __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359