99 Jimmy A/C

99 Jimmy A/C Group: alt.autos.4x4.chevy-trucks Date: Sat, May 21, 2005, 1:21pm (CDT-2) From: snipped-for-privacy@comcast.net (Robert=A0Ball) Where is the expansion valve on this vehicle? Going to have refrigerant pulled out on Monday, replace compressor, dryer , expansion valve, back to have the shop pull vacuum and recharge.

Those have orifice tubes don they? S Cook

99 Jimmy A/C

Group: alt.autos.4x4.chevy-trucks Date: Sat, May 21, 2005, 1:21pm (CDT-2) From: snipped-for-privacy@comcast.net (Robert Ball) Where is the expansion valve on this vehicle? Going to have refrigerant pulled out on Monday, replace compressor, dryer , expansion valve, back to have the shop pull vacuum and recharge.

Those have orifice tubes don they? S Cook

Whatever it has it's in the line at the fitting where the small line goes into the evaporator. (The evaporator is the part that makes the cold. It has a small high pressure line and a larger low pressure line.)

Al

that would be an orifice tube... a TXV (or thermostatic expansion vavle) is a completely different animal.

-Bret

-Bret

Sure they are different but they are both metering devices...Ive seen some with expansion valves insted of the orifice tube.. Then agian if you have say a Tahoe with rear AC you have both a Orifice in the front and expansion valve in the rear...Ive also seen Orifice tubes coming right out of the condenser... Wouldnt ya think it would be easier if they just came out with one setup ...Engineers only have to make it work once to make a big check...When the hard part is keeping it going...

They use orfice tubes because they are cheaper and also maintain better coolant/oil flow thru compressor in operation. THey are some after market varible oriface replacement tubes out there and they are said to work better than stock especailly at idle and low speeds. NAPA used to carry them and they cost about 20 bucks or so.

In the line between the condenser and the evaporator Re: 99 Jimmy A/C Group: alt.autos.4x4.chevy-trucks Date: Sun, May 22, 2005, 1:19pm (CDT-2) From: snipped-for-privacy@comcast.net (Robert=A0Ball) Back to the original question: where is it located? SnoMan wrote: "Steve Cook" wrote: Re: 99 Jimmy A/C Group: alt.autos.4x4.chevy-trucks Date: Sat, May 21, 2005,

6:57pm (CDT+1) From: snipped-for-privacy@business.net (Bret Chase) On Sat, 21 May 2005

-Bret Sure they are different but they are both metering devices...Ive seen some with expansion valves insted of the orifice tube.. Then agian if you have say a Tahoe with rear AC you have both a Orifice in the front and expansion valve in the rear...Ive also seen Orifice tubes coming right out of the condenser... Wouldnt ya think it would be easier if they just came out with one setup ...Engineers only have to make it work once to make a big check...When the hard part is keeping it going... They use orfice tubes because they are cheaper and also maintain better coolant/oil flow thru compressor in operation. THey are some after market varible oriface replacement tubes out there and they are said to work better than stock especailly at idle and low speeds. NAPA used to carry them and they cost about 20 bucks or so.

It's the freezezone

it at the end of the liquid line just before it goes into the evaporator. You will see a compression nut and larger portion of the line. Disconnect that and it is in the tube. You will need a straightened out paperclip or another straight piece of rigid wire to pull the orifice tube out. But watch out for the freon that is in the system.....it is under pressure