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Relocating Low Serice Port

MikeC5 on Thu July 23, 2009 10:07 PM User is offlineView users profile

Year: 85
Make: Porsche
Model: 944
Engine Size: 2.5 L
Refrigerant Type: R-12
Country of Origin: Germany

I was hoping to get some advice on what to do about a very poorly located low side service port. It is located right on top of the compressor which is buried down low in the engine compartment and the brackets holding the compressor make it virtually impossible to get a charge line on the fitting. It is possible to gain some room if the compressor is loosened and rotated towards the engine but then you can't run it because the belt is too loose. As I recall, the one time I watched a mechanic charge it was through the high side port with a fancy machine. I want to add a service port at an easier to reach location. Should I get a weld on port and add it to an accessible hard line section? Any suggestions on how to deal with this appreciated.

TRB on Thu July 23, 2009 10:34 PM User is offlineView users profile

You can have in in-line service port installed via welding or placed in the rubber section.


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Cussboy on Thu July 23, 2009 11:08 PM User is offline

If you don't have any leaks, I can't understand why you would need to add or check your R-12 more than like once every six-eight years. So is it worth it to you for that? Just asking...

MikeC5 on Fri July 24, 2009 6:38 PM User is offlineView users profile

Well I do have a leak or leaks and am also planning to switch over to R134. So it will involve taking much apart anyway. But it comes down to: if I want to do it myself how can I charge it if I can't get to the low port with the compressor running (belt tight)? Do they charge at the factory statically or something?

HECAT on Fri July 24, 2009 6:42 PM User is offline

Originally posted by: MikeC5
Do they charge at the factory statically or something?

YES, they drop a known weight charge in it.


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bohica2xo on Fri July 24, 2009 7:07 PM User is offline

Now there is a part I have not seen in 15 years - wish I had a picture. Oh well, Tim can make you one from a description.

We called the part a "pigtail", and they were on the shelf before the 928's showed up. Came in handy on some SAAB's too as I recall.

Just a short (dash 4 size) hose assembly, with a 90 dgree flare fitting on one end, and a service port on the other. Installed permenantly, after removing the valve core on the compressor service port. The actual hose was about 18 inches long. Usually found cable tied off to something else in the engine bay.


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MikeC5 on Sat July 25, 2009 9:14 AM User is offlineView users profile

I like that idea. I'll have to see if I can get a small 90 degree fitting on there with the belt tight. I'm also thinking about using an updated compressor which has the connections on the back and so there's more clearance.

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