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Where to start :( 2003 VW Passat

magnetchief on Fri January 30, 2009 2:02 PM User is offline

Year: 2003
Make: vw
Model: Passat wagon
Engine Size: 2.8
Refrigerant Type: R134a
Ambient Temp: 65
Pressure Low: 0
Pressure High: 0
Country of Origin: United States

Bit of background.
Purchased a used Passat 8 months back.
A/C was ok, but not as cold as my other VW.
Car has the 'climatronic' a/c control system.

Last week wife reported that the A/C was not cold.
Checked with my handy laptop and it showed that the A/C pressure switch had no output.
1st recommendation was to check refrigerant level.
Connected up gauges, ZERO ! nothing at all both high and low.
I depressed the schrader vvs on both high and low with a pen top, no pressure at all !!

Looking for some advice on where to start.
I have gauges, vacuum pump, nitrogen and associated tools.

I assume I have a leak, but it must be massive to have lost all pressure.
Do I leak check with LP nitrogen gas and snoop?
Then pump down and recharge?

Any ideas on where to start checking for leaks?

Thanks in advance
Steve





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Once Navy alway Navy

Edited: Fri January 30, 2009 at 2:18 PM by magnetchief

TRB on Fri January 30, 2009 3:32 PM User is offlineView users profile

You have to have the correct amount of refrigerant for these system to work correctly. Repair the leak and charge back to the OEM specifications. If filling with nitrogen provides your leak point nothing wrong with that method.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

magnetchief on Sat January 31, 2009 3:03 PM User is offline

Well it was an informative morning
Connected up the nitrogen and tried to pressurize the system with 20 psi.

I could hear the gas escaping somewhere under the car.
Took me a while to get the lower panels off ect but tracked it down to the compressor.

I am not sure of the make but will take photos once the batteries recharge .
The compressor seems to be in two parts bolted together from the drive end.
There is a metal looking flange between the two half's.
The nitrogen was escaping from this joint.

I am assuming that this is something that cannot be repaired.. Thus I would have to replace both the compressor and drier.

If so, any advice on where I could purchase replacement parts.
Thanks in advance.
Steve




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Once Navy alway Navy

Edited: Sat January 31, 2009 at 3:09 PM by magnetchief

magnetchief on Sat January 31, 2009 3:31 PM User is offline

A link to the photo.
In the phot there is that rust covered ring.
This is where the gas is leaking from.

http://picasaweb.google.com/lh/photo/63OiTKjtxuvyMDp9CAVkMw?feat=directlink

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Once Navy alway Navy

TRB on Sat January 31, 2009 4:39 PM User is offlineView users profile

Of course I'm always going to suggest you support the site. I would be sure it is a case seal leak before purchasing a new compressor.

New Compressor with Clutch

Accumulator/Drier

Orifice Tube

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

magnetchief on Sat January 31, 2009 4:49 PM User is offline

More than happy to purchase the parts from you guys.
Thanks for the assistance.

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Once Navy alway Navy

magnetchief on Sat January 31, 2009 4:53 PM User is offline

A case seal? I used snoop around the rust colored ring on the compressor.
The leak was so bad that the snoop would be blown out before forming bubbles.
I could feel and hear the leak.
So pretty sure that's where the leak is from.

The parts you recommend, are they correct for my 2003 Passat wagon with climatronic?



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Once Navy alway Navy

TRB on Sat January 31, 2009 4:55 PM User is offlineView users profile

Two of my sources say yes.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

magnetchief on Sun February 01, 2009 4:28 PM User is offline

Excellent
I have another question relating to this. Any idea why this seal would blow? I worry that there may be something that will cause the same on the new compressor.


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Once Navy alway Navy

TRB on Sun February 01, 2009 4:57 PM User is offlineView users profile

Possible high pressure issue but case seals can leak from time to time on all models. It is not really a normal issue so I could not say a certain condition caused your failure.

Thanks for the support!!!!

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

magnetchief on Sun February 01, 2009 7:02 PM User is offline

Ok thanks for your help.
Parts ordered Now the fun begins.



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Once Navy alway Navy

mk378 on Tue February 03, 2009 10:56 AM User is offline

Corrosion from the outside can eat away the metal until it gets to under the o-ring, causing a major case seal leak. If the metal is gone, you will need a new compressor. Does the compressor still rotate freely by hand? It could conceivably have blown apart from mechanical failure inside.

magnetchief on Tue February 03, 2009 6:53 PM User is offline

Yes it still rotates freely without any strange noises.
Once I get the thing out of the engine and examine the pipes ect I will know if there was an internal mechanical failure.


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Once Navy alway Navy

magnetchief on Thu February 05, 2009 12:07 PM User is offline

Damn, that was quick. Parts arrived this morning.

I have a further question Tim. The Bently service manual states that the VW OEM compressor comes with the full system oil charge already in the compressor.

Do you know if these replacements are the same? The compressor is 'Valeo' Brand (China)
And it shows part number 10000710. Oil: Pag 46.


Thanks for the help.





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Once Navy alway Navy

TRB on Thu February 05, 2009 2:09 PM User is offlineView users profile

If the documentation in or on the box does not state one way or another. I always drain the compressor and refill to be sure.

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com


Edited: Thu February 05, 2009 at 2:09 PM by TRB

magnetchief on Thu February 05, 2009 3:36 PM User is offline

No documentation, so a drain it is.
Thanks


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Once Navy alway Navy

magnetchief on Sat February 07, 2009 6:19 PM User is offline

Well I found out why the comp leaked.

Can you see the problem?

http://picasaweb.google.com/magnman/Comp?authkey=3lGr8BmJJ-Y&feat=directlink

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Once Navy alway Navy

Chick on Sat February 07, 2009 8:38 PM User is offlineView users profile

Humm, that could leak...

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Chick
Email: Chick

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