When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Picture of the Kent Moore tools for Delphi/Harrison OEM compressor clutch service and a picture of what the air gap should look like. The clutch face should be parallel to the pulley face within a few thousandths of an inch. My recollection is air gap should be 0.040 inch max. and around 0.010 min.
I don’t know if 4 seasons is the same design and specification.
Picture of the Kent Moore tools for Delphi/Harrison OEM compressor clutch service and a picture of what the air gap should look like. The clutch face should be parallel to the pulley face within a few thousandths of an inch. My recollection is air gap should be 0.040 inch max. and around 0.010 min.
I don’t know if 4 seasons is the same design and specification.
I appreciate the help, I got it done this afternoon. I was able to rent a kit (57150) from Autozone. I had enough room to get a 3/8” ratchet and extension on the center shaft but not enough room to get the clutch tool on without hitting the top of the rack. By unbolting the compressor, I had just enough room for the tool to clear the rack. I ended up with about .020” of an air gap which is a tad bit more than the OE spec of .016” but I am going to leave it alone. It’s quiet when it’s off now and it engages when I turn on the A/C.
The AC blows cold, but I had someone tell me that I should double check the pressures since they believe I am a bit under filled due to the simple fact that two 12 oz cans result in something less than 24 oz of you take into account the purging of the air from the manifold for each can and also the amount lost due to the hose length.
GM and Delphi engineers would have run a charge determination test to identify the optimum amount of refrigerant charge. They would have then added 1/8 pound (it might have been 1/4 pound back in the ‘90’s when the C5 was developed) of reserve charge to allow for very small amount of charge loss over years of use. The reserve charge does elevate the discharge pressure somewhat and slightly degrades a/c air out temperature; but it allows for long service life before you would notice a performance loss due to low charge..
The AC blows cold, but I had someone tell me that I should double check the pressures since they believe I am a bit under filled due to the simple fact that two 12 oz cans result in something less than 24 oz of you take into account the purging of the air from the manifold for each can and also the amount lost due to the hose length.
Thoughts?
I thought that your system capacity was 26 oz ? If that is the case, you need to add two full cans (deducting 1 oz per can because you can't get it all out), Then use a scale for the 3rd can and until the scale shows you have removed an additional 6oz (you have to account for 2 oz for service hoses).
So:
2 cans +
2 oz (1 oz loss per can) +
2 oz ( 2 oz loss in service hoses) +
2 oz for total of 26oz
I thought that your system capacity was 26 oz ? If that is the case, you need to add two full cans (deducting 1 oz per can because you can't get it all out), Then use a scale for the 3rd can and until the scale shows you have removed an additional 6oz (you have to account for 2 oz for service hoses).
So:
2 cans +
2 oz (1 oz loss per can) +
2 oz ( 2 oz loss in service hoses) +
2 oz for total of 26oz
per service manual 26 oz per fender sticker it day 1.5 lbs. I was under the impression that we default to fender if values differ.
Update here. I was able to get this job done. Air is blowing cold. I did have an issue with the Four Seasons compressor. The clutch gap was non existent and didn't realize that I needed to adjust or check it. I should have known there was an issue when I was able to prime the compressor simply by turning the pulley without any tool. I did call Four Seasons and they are supposed to be set from the factory so that's not to be expected. It was a pain to adjust on the car, but I was able to pull the clutch away a bit using a puller that I rented from Autozone. Lucky for me that unbolting the compressor provided just enough room to install the puller just barely clearing the top of the rack.
