Question about 1999 Saab 9-5

2 Answers

2003 9-5 with an air conditioning leak into the cabin filter. New compressor was installed and a leak-down test shows dye in the cabin filter. The evaporator and lines seem dry but one of the lines from the expansion valve is stained and wet. Is it possible the valve is causing the leak or is it more likely to be a line problem? Mechanics time and expense to replace the evaporator and lines on spec is prohibitive. George

Posted by on

  • 2 more comments 
  • george_lesli Sep 09, 2010

    Thanks for your response. The referenced pictures are from a 1999 SAAB and I see the evaporator in the engine bay; much easier to access. My car is a 2003 9-5 Aero with the evaporator inside the cabin.

    I do not understand the last comment "Could isn't the valve, then the o-ring in there ..."

    Does it mean the problem is probably not the valve, but 1 or some of the O-Rings in the valve??



    The expansion valve on mine is in the middle of the firewall. The entire system has been pressure tested and the only area showing the dye is on the cabin filter and a little on the first bend of the line from the inside of the firewall inside the cabin, inside the box with the cabin filter and evaporator.

    Since the evaporator and lines have no joints up to the back of the expansion valve, can I have the mechanic remove the expansion valve and replace the o-rings at the back and the front of a new expansion valve or the existing valve.

  • george_lesli Sep 09, 2010

    The dye test was done and shows stains and fluid on the cabin filter. That is how we know there was dye in the cabin filter box. The shop is not able to confirm where the leak is located however. The lines to the evaporator from the expansion valve have no connectors in between. Can we change the O-Rings in the expansion box from the engine bay?

  • george_lesli Sep 09, 2010

    The shop working on the problem specializes in AC but have never repaired a SAAB before.

    They located the leak to be somewhere around the expansion valve and inside the cabin of the car by pressurizing the system with nitrogen to 250 psi and some dye. It drops pressure by 20 psi in 5 minutes and seems to spray dye into the cabin filter box under the dash.

    Can the shop get at all the O-rings in the valve by removing the valve? If so, I will have them pull out the valve and replace the O-rings in the front and back of the valve as a next step.

    The instruction we have located so far indicates the pipes to the evaporator have to be cut and the evaporator removed to do this.

    That means buying a new evaporator, lines and expansion valve, an expensive solution.

    I was hoping there was a way to replace the O-rings without stipping the dash out of the car and destroying the existing lines and evaporator.

  • george_lesli Sep 09, 2010

    Thanks for the help and clarification. I will let you know how successful we are with the procedure.

×

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Saab Master
  • 76,846 Answers

Here is what must be done to track down this leak, have AC dye put in the system, run the car a week or so then have an AC shop use a black light to see the green dye, it glows anywhere there is a leak, have been repairing automotive AC for 40 years and this is the best way to do this, make sure all connection are clean before the test is run.

Posted on Sep 09, 2010

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Saab Master
  • 17,970 Answers

The common freon leak spots are the condenser, any O-ring, suction line, the schroeder fill valve, and the high pressure pipe along the right side frame rail. The last one is the most common, because the rubber from the straps that hold it down deteriorates from engine heat, leaving a lovely condition for bimetallic corrosion. Some cars suffer from low pressure aluminum pipe leaks in the pipe beginning at the accumulator that dips down running along the passengers side before turning 90* and crossing above the splash pan (where it becomes a rubber hose) below the front of the engine again becoming an aluminum pipe where it connects to the compressor. The intake pre-heat shield or air intake tube rubs against the aluminum low pressure hose causing it to break through. If your schroeder fill valve is leaking, it is replaceable separately from the pipe.

Could isn't the valve, then any O-ring in there or any bad installation. Check this guide as reference help DIY Air (click the links):
-
Step 1
- Step 2
- Step 3
- Step 4
- Step 5

Hope help with this.

Posted on Sep 08, 2010

  • ZJ Limited
    ZJ Limited Sep 09, 2010

    If you don't have the right a/c tools for this trade, it will be tough and pure guess work.



    Correct way is to use a D-tek/Inficon R134/R12 leak detector for small
    and hard to reach area leaks and leak detector liquid in spray bottles
    for big leaks.



    If you suspect the expansion valve is leaky, spray some liquid soap
    base detector on suspect fittings and in oil soaked areas and look for
    bubbles. That is if the system still has some refrigerant left to keep it above atmospheric pressure.

    If all the freon has leaked out, you need to pressurize the system to leak test it.

    Most shops will pressurize it with Nitrogen and small amount of Freon R134A to about 200 psi and leak test it.

  • ZJ Limited
    ZJ Limited Sep 09, 2010

    Check this, juts as reference guide, I quote this Expansion valve removal (Michael Rosenfield)

    On the 99-01 9-3, the expansion valve is serviced from below. You will need to remove the plastic panel under the engine, but nothing else. I'd also advise a cold exhaust system! Still uses a 10mm socket on the outer bolt and a 4mm hex key on the other two.

    STEP 1 Drain the the AC system (Depending on the car)
    STEP 2 Remove the wiper arms for the windshield
    STEP 3 Remove the false bulkhead cover
    STEP 4 Remove the windscreen wiper assembly
    STEP 5 Remove the air filter housing and remove the air filter & then remove the housing
    STEP 6 Remove the high and low pressure pipe's blockconnection from the expansion valve remove both pipes. The allen bolts are 4MM
    STEP 7 Be sure to plug the drier holes when removing the lines to avoid contamination
    STEP 8 Remove the expansion valve & Plug the holes. A 10mm bolt holds the flange for the high & low pressure tubes, but once they are moved out of the way, you need an allen wrench to remove TWO MORE bolts holding the expansion valve to the flange that connects it to the tubes coming from the evaporator. Now you can remove the expansion valve.
    STEP 9 Refit in Reverse

    Thanks to Rob for contributing to this FAQ!
    Thanks to Bryan Clayton for contributing to this FAQ!


×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Can a 2002 ac compressor go on to a 2003 kia sedona?


As long as they have the same part number there should be no issue. Sometimes the same part is used for four or five years consecutively. Check the part number and appearance.

Jun 10, 2015 | 2003 Kia Sedona

1 Answer

A/c smells funny it seems like the clutch is out


Is system blowing cold air? if low gas system will blow warm and smell, When was the cabin filter last replaced, the cabin filter is used for inside air, make sure its clean,

I would start by having the system checked to make sure the gas is full and dye added so if system goes warm again the dye will show the leak.

Sep 03, 2012 | 2006 Toyota Matrix

1 Answer

Ac problem loosin gas


Hi there:
What can happen is the vehicles Freon will leak out and reduce the total pressure in the system. Then the low-pressure cut out switch will disengage the compressor when the low side is detected below 25 psi.

This safety feature is to protect the compressor itself. I have seen mechanics bypass the low cut out switch for testing. This should never be done and is not recommended.

The visual presence of oil around a fitting or pressurized line is a strong indication of a refrigerant leak. So my first step in air-conditioning leak diagnosis is to perform a very careful visual inspection of the entire system.

Although this is always my first step for diagnosing Freon leaks it is not always effective in finding the exact problem. In fact, this visual inspection will only uncover large to extremely large leaks. A more common air-conditioning problem would be small leaks that allow Freon to escape over long periods of time. So to follow will be some methods to detect these small leaks.
- The Robinair leak detector is a hand held battery operated electronic leak sniffer. The test probe on the end of the leak detector is moved about 1 inch per second in the areas of suspected leaks. The Robin air leak detector has an alarm that will go off when it detects the presence of a Freon leak. Note on some other models they may have flashing lights or a buzzer. Also some leak detectors are specialized to detect only certain freons (example: 134a) but they all are designed to alert you when they sniff the refrigerant.
- To find refrigerant leaks using the fluorescent tracer system, you first have to install the fluorescent dye into the cars air-conditioning system. Always follow the instructions and do not install too much dye! Too much can reduce the cooling efficiency of the system. Different refrigerant dye leak detectors will accomplish this in different ways. The system we use at work has a device that looks like a caulking gun, and a hose that connects to the low side fitting. Then you actually push the dye into the low side with the engine running and the compressor engaged. Next you run the air-conditioning system for several minutes to distribute the dye evenly. Then you put on your yellow glasses and examine the system with a fluorescent light.
The fluorescent dye shows up easily wearing the yellow glasses.

A very popular selling item is Refrigerant with leak sealer. This item will only seal very small leaks. I have used the stuff pictured to the right "super seal pro" and it does work in some situations.

The Freon leak sealer works best when you have low side system leaks. And if you happen to have a small leak from an O-ring on the low side this stuff works well. If you have a leak on the high-pressure side chances are this sealer will not work for you.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day

Feb 15, 2012 | Cars & Trucks

1 Answer

MY AC ON 2003 FORD MUSTANG BLOWS HOT AIR AND DONOT HAVE OWNER MANUEL TO SEE IF FUSE BLOWN


The most common cause for an AC blowing hot air is the system is low on refrigerant. A small leak will eventually lose refrigerant until the compressor eventually will shut down. Most compressors require a minimum of 20psi to engage and chill the air. Most certified service stations can diagnose and recharge most systems for $100-150 depending on where the leak is. There are do it yourself kits available at most auto parts stores that come complete with leak detector (R-134A with dye to show where leaks are) compressor oil, and a recharge hose.

Aug 31, 2011 | 2003 Ford Mustang

1 Answer

Continuous loss of refrigerant in air conditioning system. A/C has been evacuated and tested with dye under pressure but no leaks are found (except my usually excellent mechanic says it might be under the...


Could be the evaporator, rare but possible. Double check the schrader valves on the high and low pressure lines, and the shut off valves on the lines going to and from the condensor, and the condensor itself. (common culprit) Also the front seal on the compressor if leaking will have oily residue all over. No offense but try a different mechanic. Sometimes a new set of eyes works wonders!! Your mechanic won't be offended. If he is, fire him.

Aug 24, 2011 | 2003 Mercury Grand Marquis

1 Answer

Compressor is working allowing hot air to blow but only when on high--mechanic says possible leak and wants to put dye to find leak--so my compressor is fine? or the air wouldn't be blowing t all?


The compressor has nothing to do with the heater box blowing air. The compressor is used to 'compress' a gas and change it to liquid and back to gas, etc to produce cooling eg air conditioning. Your system is leaking gas and dye is sometimes the only way to find a small leak.

Aug 07, 2011 | 1998 Buick Century

1 Answer

Air conditioning problem


if pressure is in the red when engine is running and compressor is engaged, compressor clutch turning with pulley, and not getting cold air, it seems that your compressor may need to be changed. with engine running gage should read between 30 and 60 lbs.

May 19, 2009 | 2000 Dodge Durango

1 Answer

Air Conditioning on BMW 3 Series 2003


change the cabin filter will get rid of the smell however for cold ac you will need to recharge the ac and have a black light test in 5 days or less after it was recharged. then they would spot for a leak in the ac system

Sep 02, 2008 | 2003 BMW 325

Not finding what you are looking for?
1999 Saab 9-5 Logo

Related Topics:

790 people viewed this question

Ask a Question

Usually answered in minutes!

Top Saab Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

yadayada
yadayada

Level 3 Expert

76846 Answers

rgbypoet

Level 2 Expert

166 Answers

Are you a Saab Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...