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Username Post: Orifice tube location        (Topic#262927)
shortcircuitky 
Forum Newbie
Posts: 1

Reg: 05-13-11
05-13-11 09:03 PM - Post#2089813    

I have a 1998 Chevy K1500. I've replaced the compressor, a/c hoses, and accumulator. I need to replace the orifice tube. Problem is I can't seem to find where it is. I have checked the bottom line of the evaporator..not there, I've check both evaporator lines...nothing. Any ideas?

This truck was wrecked and rebuilt. It is possible that this part was left out.

Where should it go?

Thanks.

 
someotherguy 
Moderator
Posts: 25142
someotherguy
Age: 43
Loc: Texas
Reg: 08-01-03
05-14-11 05:16 AM - Post#2089861    
    In response to shortcircuitky

Welcome to the forum,

Since about mid-year 1991, the orifice will be in the lower line on the condenser, so you'll have to remove the grille to access it.

Early 1991-back to 1988, it was in the lower line off the evaporator.

Richard
94 C2500LD / 94 C1500 / 06 300C SRT8
Check out my truck shop projects


 
Chevytech 
Subject Matter Expert - Senior Member
Posts: 2922

Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
05-14-11 05:53 AM - Post#2089872    
    In response to shortcircuitky

http://67-72chevytrucks.com/vboard/showthread.php?...
For those of you that are wondering why you are not getting replies to your thread:

Did you give the model, year, engine, fuel system type, and transmission information?

If the it has been altered from stock let us know about that too.


 
Boog 
Super Senior Member
Posts: 3493
Boog
Loc: Central Arkansas
Reg: 04-28-02
05-15-11 05:20 AM - Post#2090221    
    In response to Chevytech

That would be it alright. Those sneaky engineers removed it from the "normal" location nearer the firewall and hid it behind the grille.
Boog
69 Chevy step
06 GMC ccsb Z71
00 GMC excab Z71
All GM...'nuff said!
JR Nation


 
Bonsai 
Forum Newbie
Posts: 4

Reg: 09-14-11
09-14-11 06:02 PM - Post#2137337    
    In response to someotherguy

I have a 97 Sierra and after trying to locate and replace the orifice tube, I couldn't find one in the lines connecting to the condensor. I was going to put one in anyway but the one they sold me didn't fit. After investigating some more I realized that someone had put a pancake style filter/orifice? inline from the condensor to the evaporator. The reason I am confused is because I'm trying to fix my ac and my gauges are saying that I'm not getting enough pressure (high side) and I had put 8 oz of pag oil in my compressor before evacuating/recharge. I did notice oil wanting to come out of the high side ports when installing. Maybe the line is clogged at the pancake?

 
jbknight311 
Frequent Contributor
Posts: 1011
jbknight311
Loc: Fort Worth, TX
Reg: 11-27-06
09-15-11 09:14 AM - Post#2137486    
    In response to Bonsai

The orifice tube is in a slightly bulged section of the line at the threaded connection to the condensor. Once you break the fitting you will see the end of it. Do yourself a big favor and borrow from the parts store or buy a puller/installer tool. The new ones are hard to push in most of the time and you will end up mashing the end of it pushing it in. Make sure to coat the o-rings with PAG first.

8oz seems like a lot of oil to add unless the system was empty of it before. If it is wanting to leak out when you hook up your gauges you may have a tad too much oil in there.
98 C1500 Silverado extended cab 5.7 auto 2wd Fort Worth, TX.


 
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