Removing pain in the *** a/c pump from 90ish chev truck - Hot Rod Forum : Hotrodders Bulletin Board
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Old 05-16-2003, 02:52 PM
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Post Removing pain in the *** a/c pump from 90ish chev truck

Yeah so I finally got the freaking thing unbolted, and me not sleeping I didn't think for the longest time that I don't have to get the serpentine belt off over the lip on the ac pump, i just need to slip it off the self tensioner I'm dumb

Anyhow, I got 2 questions, first off how do I know when I have completely drained the a/c of the R-12? Secondly, I had to make a slight dimple in the valve cover for a bolt to clear (and frustration too) anyhow, this truck engine is the fuel inject TBI with the ribbed valve covers and the dimple simply removed 2 of the ribbes and pushed it down half of one. It is right on the end so I don't think the rocker will hit, I even unplugged the primary and turned it over to see, but there was no loud sound. Instead a slight ticking, and since this is not my truck I'm not sure if this sound is common or not? So I guess my second question is how much clearence is there from the stock rockers to the stock vavle cover and is my dimple safe?

To sum it up:
1. How do I know when I have drained the a/c's R-12 completely, and also how would you recommend doing it (I simply used something long and with my sleeve over my hand held the filler valve open, some crap squrited out so I left it a while then now I can get the ocassional hiss to come out, but I don't wanna pull that hose off until I am sure)
2. how much clearence is there from the stock rockers to the stock vavle cover and is my dimple safe?

Thanks alot guys

[ May 16, 2003: Message edited by: stonedchihuahua ]</p>

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Old 05-16-2003, 03:08 PM
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Dave, what method did you use to vent the ac gas? if you did it the old fashioned way like your not sposed too, just wait for the hiss to stop.
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Old 05-16-2003, 03:26 PM
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by the way what is the proper way, Isn't it when you use the hoses with the regulators?

I do things the way that makes sense, specialty tool free
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Old 05-16-2003, 03:28 PM
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To properly recharge the system, you need to draw a strong vacuum to insure there is no air or moisture that would pollute the new charge. That will also insure all R-12 is gone.
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Old 05-16-2003, 03:32 PM
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Well, basically I'm just trying to drain the system so I can change the pump, then they can get it recharged later... cuz the pump was seized and breaking belts and since i needs to be replaced anyways and I'm my g/fs family's BEOTCH I might as well fix it while I'm here.
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Old 05-16-2003, 03:43 PM
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illegal in many countries around the world, just out on a heavy pair of heavy gloves and depress the schreader valve until no more hiss occurs. do this in a well ventilated area. and to recharge, take it to a shop, have them evacuate it for an hour or so and then charge it up.

what I'd do if i was in a non freon expelling country.
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Old 05-16-2003, 03:45 PM
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you might be able to get by with just changing the a/c clutch assembly. way cheaper than a new compressor........
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Old 05-16-2003, 03:59 PM
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When it stops hissing, it`s empty.

About then the Environmental Control boys pull in to the drive with handcuffs and a warrant.

VERY VERY stiff fine in the States.
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Old 05-16-2003, 04:09 PM
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Oh yea the dimple. If your dent is 1/4 or deeper right on the rocker, it could touch.

Use 2 or 3 ft. of rubber tubeing as a stethoscope one end tight on the dent other end at good ear.
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Old 05-16-2003, 04:11 PM
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Will Canada let you post from jail lol lolLOL
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Old 05-16-2003, 04:27 PM
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[quote]Originally posted by troy-curt:
<strong>Will Canada let you post from jail lol lolLOL</strong><hr></blockquote>

LMAO
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Old 05-16-2003, 05:00 PM
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Personally, if it was me and I didn't have the equipment to discharge the system myself, legally, I would have taken it to a shop to have it done. They could have saved the R-12 to recycle it, and put it back later. If you are going back with R-12, what you let out in the air may cost you as much as the new compressor.
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Old 05-16-2003, 10:14 PM
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meh, not my truck and also yes there are heavy fines here about a few grand.... then again a certain someone filled up the a/c in my car and is certified and said, ah to hell with it they gotta catch me in the act to fine me.

Oh yeah, since I was pretty sure the rocker wasn't gunna hit since my dimple wasn't all that big, I just pulled the main coil plug and turned the engine over, heard a ticking so I got my girlfriend to do it. Saw the spart from the main coil on time with the tick figured its' good to go... Hopped in the truck bagged it for a while around town after everything seemed to be working okay... Came back

I LOVE DOIN THINGS THE REDNECK WAY!
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Old 05-17-2003, 07:16 AM
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[quote]Originally posted by stonedchihuahua:
<strong>
I LOVE DOIN THINGS THE REDNECK WAY!</strong><hr></blockquote>

I'm not quite sure if I know how to take that.....
<img src="graemlins/mwink.gif" border="0" alt="[mwink]" />
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Old 05-17-2003, 07:24 AM
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Hey, Dave if you leave the system open for more than a few hours you will need to change the dryer. It will absorbed the moisture in the air and become worthless to the system.
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