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99 Volvo S70 - High Side Fitting? Does it Have One?

marvin-miller on Mon August 27, 2007 3:13 PM User is offline

Year: 1999
Make: Volvo
Model: S70

Hi Folks;

I'm working on a '99 Volvo S70 and was wondering where the high side service port is. It doesn't look like it has one (or it's hiding on me).

Can anyone confirm that the factory left it out?
If so, how does one take a high side reading with a gauge?

Thanks guys!
Marvin

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Best & Thanks;
Marvin

Karl Hofmann on Mon August 27, 2007 3:28 PM User is offlineView users profile

From memory Marvin, they don't have one..

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Never knock on deaths door... Ring the doorbell and run away, death really hates that!

iceman2555 on Mon August 27, 2007 3:32 PM User is offlineView users profile

My book only list a low side port (draining-filling) for this vehicle. Many vehicles on the road today are being supplied with only one service port. It is possible, using a pyrometer to check temps on the discharge or liquid line and convert to pressures.

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The strongest reason for the people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government.
Thomas Jefferson

marvin-miller on Mon August 27, 2007 3:35 PM User is offline

Thanks guys - good to hear from you :-)

I dug through the service manual for this thing (Mitchell) and came to the same conclusion - they don't use a high side fitting :0

Thanks for the info! Now I'll go and search for where the orifice tube is located....

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Best & Thanks;
Marvin

Karl Hofmann on Mon August 27, 2007 3:41 PM User is offlineView users profile

Now you have got me Marvin, I have never needed to pull the O tube..Nearly always clutch adjustment here in the UK 'cos they cycle so bleedin often...And the entire compressor has to come off for that...Rats

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Never knock on deaths door... Ring the doorbell and run away, death really hates that!

bohica2xo on Mon August 27, 2007 4:07 PM User is offline

Long time no see, Marvin

Volvo has run a single port off & on over several years - sometimes it is the high side, others the low. Occasionally you find an "extra" set of ports on the back of the compressor...

If I worked on it you will find the appropriate fitting installed. I used to TIG weld them in - but someone pointed me at the following Delco part numbers...

15-5529
15-5530
15-5531
15-5532

I can bet there will be some boos & hisses here, but I have never had one fail...

B.

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"Among the many misdeeds of the British rule in India, history will look upon the act of depriving a whole nation of arms, as the blackest."
~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.

marvin-miller on Mon August 27, 2007 4:26 PM User is offline

Hi Brad - good to hear from you !

I like that TIG welding idea :-)
I checked out the A/C Delco numbers and they look like they'll do the job.

I'm not sure what the issue is with this one yet. The vehicle has 160,000 K on it and the complaint was that the A/C worked great and then all of a sudden there was a smell like burning rubber and then no A/C. I checked it with the guages and found 30 psi on the low side (static) but of course, I can't read the high side!! (arggg Volvo!)

A recover and evac showed the micron gauge at 20,000 (highest reading) for a long time and then it rapidly dropped to 750 microns. I then charged the system only to find it works and seems to have only one small leak on the pressure switch. Right now I'm letting it sit so that gas will pool up in the evap case and I can check it for a leak after lunch.

I'll recover again and find the o-tube and take a look for color/metal. If there's anything there I think a new compressor/accumulator would be a good way to go given the mileage etc.

Originally I thought maybe the compressor locked (hence the smell) but it seems free and works. This is the kind of job where you really need to see the high side guage to get a better idea of what's happening.....

Best!
Marvin

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Best & Thanks;
Marvin

marvin-miller on Mon August 27, 2007 7:20 PM User is offline

Just an update to future people who happen to stumble upon this thread....

Turns out the Evap was leaking badly. Just holding the leak probe up to the cowl at the base of the windshield made it go crazy.
Also, checking at the vents inside the vehicle after it sat for a bit caused a lot of refrigerant to come out the vents. The orifice tube appears to be buried under several other hoses. The high side line grows in diameter at one point - felling around under there with my fingers revealed two nuts on the tubing line.

Mitchell time on the evap is 7.0 - I think I'm going to pass on this one :-)

Thanks to all who replied! It was good to know you guys are still out there and going strong!

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Best & Thanks;
Marvin

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