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Use AC tubing for oil cooler
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Posted by john_gonzo [Email] (more from john_gonzo) on Sun, 14 Oct 2018 05:59:58 Share Post by Email
In Reply to: oil cooler solutions, ryan [Profile/Gallery] , Fri, 12 Oct 2018 15:39:32
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The pic shows how I fixed mine.

The aluminum sections are Volvo AC tubing cut from a salvage car. These AC lines have the "O-Ring Pilot Threads" fitting* that mates with the Saab oil cooler. I flared the other end of the Al pipes using the flaring tool shown. This standard flare allowed me to use the brass fittings to convert to hose barbs. I cut the stock oil cooler hoses to length and double clamped them on the barbed fittings. I reused the original nut to hold the Al lines to the cooler. (Slide the nut on the line BEFORE flaring the other end.) New O-rings of course.

The copper bands are sleeves that extend under the brass nuts. The AC line OD is slightly undersized for the brass nut ID. Next time I'll use a larger diameter AC line.


* More info on O-ring Pilot Threads:
The aluminum "bead" formed into that pipe compresses the O-ring to provide the seal. The nut provides the mechanical connection. See page 45 of this PDF. Two versions: male and female threads for the capture nut.
http://www.eaton.com/ecm/groups/public/@pub/@eaton/@hyd/documents/content/pct_472120.pdf

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