Automotive Air Conditioning Information Forum (Archives)

Jhruzek on Mon May 25, 2015 9:25 AM

Year: 2001
Make: Ford
Model: Excursion 7.3l diesel
Engine Size: 7.3
Refrigerant Type: 134a

The manifold for my a/c has what appears to be a pressure relief. My stealershop's mechanic wanted to replace the compressor. I pulled a vacuum doe to below 30 for an hour and it held for over 5 minutes. I added refrigerant and found the leak from the relief valve. What do you think is the most likely cause? I think a 14 year old valve just got old. Are parts in it replaceable? Or just reads the entire manifold hose unit?

TRB on Mon May 25, 2015 1:46 PM

Many relief valves are available. I don;t see it listed on any of or vender's sites. But if you could take an image and post the thread pitch I bet we can find one for you. Ford parts may give you the Motorcraft number which we could cross also.

Relief valves can go bad. But they usually blow from high head pressures. Which gets back to our discussion on debris in the system or a faulty fan clutch. Glad to see you're digging into this and getting to the cause of the issue.

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

Jhruzek on Fri May 29, 2015 11:41 PM

O tube looks ugly. Will need to order the whole 9 yards. I could attach a picture but I don't see how to do so.

TRB on Sat May 30, 2015 12:31 AM

Upload icon upper right. Then cut and past the link in a post.

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