Question about 1998 Pontiac Grand Am

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Can't find the expansion valve on a 98 3.1L Grand Am

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? what is the expansion valve for? coolant?

Posted on Jun 05, 2010


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Rear ac blows warm after replacing expansion valve and evap core,also cold at expansion valve and temp actuator is working

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Where is the expansion value located?

Here's a video from Scotty showing you how to replace your expansion valve,had mine replace not long ago,had Midas do mine. Replacing An Expansion Valve In Your Car ,hERE'S A NEW PART. Expansion Valve at AutoZone com Best Expansion Valve Parts for Cars Trucks...

Jul 26, 2015 | 2001 Hyundai Tiburon

1 Answer

How do I replace the expansion valve on a 2004 grand vitara

so where it, point to a locating and say,,, my xxx , locate here
needs to be replace.
where are you. in the car, under hood, under car, where?

ill take a wild guess. (deep inside the Evaporator casing)?
the A/C expansion valve
the A/T has one too, in the tranny. as does oil pump and P/S
A/C or as we call it HVAC !
the expansion valve on most cars are buried as deep as possible
making replacement a true horror,
the FSM answers this long answer,

on 89-98 year here is a photo review for free.
with this and the link above , its all clear.

see A/C box ,during heater pull.

Aug 04, 2013 | Suzuki Grand Vitara Cars & Trucks

1 Answer

Expansion Valve

Follow the a/c lines to the firewall. The part they are attached to is the expansion valve. Once the a/c system is evacuated the lines can be removed from the expansion valve. The expansion valve can then be removed from the EVAP core.

Jul 13, 2013 | 2004 Nissan Maxima

1 Answer

1996 grand am gt has a/c problem. Found low pressure side to be 75 PSI and high side was 150. I think it's the expansion valve, if so, where is it located. Temp was between 85 @ 90.

I think you have 2 issues

It either has a leak & someone tried to
add refrigerant & let air in or your
compressor seal slowly leaks & you may
be able to evacuate & recharge it

It won't work next summer though

Forget the expansion valve unless you had a
compressor failure.

Jun 28, 2011 | Pontiac Grand Am Cars & Trucks

1 Answer

Where is the expantion valve on the A/C in my 96 grand am?

The thinnest line going to the evaporater core has the expansion tube inside of it at the fittings nut conjoining the two tubes together

Aug 29, 2010 | 1996 Pontiac Grand Am

1 Answer

Were is the expansion valve on a 1995 grand cherokee

HI, if your looking for the A/C expansion valve it has been replaced by what is known as a fixed orifice tube. You will find this located in the line running from the condenser and the evaporator. you will need to remove the line and you will see a plastic tube inserted in one end. You may need a pair of needle nose pliers to remove it. good luck

Aug 25, 2010 | 1995 Jeep Grand Cherokee

2 Answers

Took my 2001 dodge grand caravan in to have compressor replaced, it was going out. Ac worked great before it went in, now they have replaced the compressor, dehydrator,expasion valve etc. Now it blows hot...

Check your A/C heater controls at the dash, it is not controlling the opening and closing of doors inside your dash, it might need to be replaced or some rods or levers got accidently disconnected when they were installing the Expansion Valve. The shop that repaired your A/C is responsible for making sure everything is working properly.

Jun 16, 2010 | 2001 Dodge Grand Caravan

2 Answers

Where is the expansion valve located on a 98 Grand Am 3.1?

Grand Am has an expansion valve. Link below has part number and picture of what you are looking for.

Unfortunately, I do not know precisely. But for the most part auto a/c's are all the same. Below I will describe how to find it. I have also included a aguide to determine system operability that may or may not be helpful. Just trace the system with flow path described below the valve has to be between condensor and evaporator.

Reminder the flow for the a/c system is :
1. From the compressor a high pressure (HP) gas goes to the condenser in front of the radiator.
2. From the condenser a HP liquid goes to an expansion device (orifice tube or expansion valve)
3. From expansion device the low pressure gas enters the firewall to the evaporator.
4. From evaporator the low pressure liquid/gas mixture goes through the dryer2_bing.gif back to the compressor suction.

Below is a guide to troubleshoot and check system function. This can be done by most folks.

Look at the front of the ac compressor and have someone turn on the ac from inside the car. The front of the pulley(clutch) will spin when turned on.

If it does not spin, the low pressure switch (LPS) is not satisfied. Meaning there is not enough freon in the system to operate the system. Means low freon capicity because of a leak.

The LPS can be jumpered to cause the compressor to run (clutch to engaged) which will draw the freon in the system.

The LPS is usually a two wire sensor on the suction of the compressor. (between evaporator and compressor) Unplug the sensor and install a jumper, this will engage the clutch. Connect a new can of freon
and fill to system capacity.

The capacity of the ac system will be on a label under the hood, do not overfill. Probably about 2 lbs. Local parts stores (Auto Zone and Advance) will have freon with stop leak. This may help the leak. They also make a freon with a UV dye. I always add a single can with dye so that if stop leak does not work I can find the leak in the future.

The system should be filled until suction pressure is about 30 to 38 psi..

May 31, 2010 | 1998 Pontiac Grand Am

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