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#1
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Leaking Expansion Valve?
Ya think?
I bought my 300cd a decade or so ago, and I knew it had some history of AC leaks. I have all the receipts for the life of the car. But it was still R-12 and it blew cold when I bought it, and any leakage was slow enough that for the three or so years that I used it before kids, I never added any. Then the car sat for ~6 years. And there was no AC. I’ve been slowly getting the car back going again, doing some updates that I had meant to do, and others that have popped up. It was nice and cool until recently - now heat is here. So I wanted to troubleshoot. I don’t have bone dry nitrogen or R-22 for troubleshooting, but I could get some ES-12a for off road troubleshooting. I also got dye. So I installed this, and have run it a few hours. That stuff really does work well btw. Mind you, I’ve never pulled the kick panel before, but did so to pull the blower to both look for dye and really to try to lube it as preventive maintenance. I got the panel down and was surprised to see it look oily down there. And this! After I pulled the blower, I saw this: I’m guessing it’s just a bad o-ring, and the leaking refrigerant takes oil with it. Nothing under the kick panel is particularly oily. The noise insulation has some on it, but it isn’t sopping wet or something. I guess the time without r-12 and oil on the seal caused it to dry and crack. Thoughts?
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Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (113k) 1991 350SD (206k) 1991 300D (228k) 1993 300SD (291k) 1993 300D 2.5T (338k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (265k) Past Diesels: 1983 300D (228K) 1985 300D (233K) Last edited by JHZR2; 06-08-2020 at 01:03 AM. |
#2
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Curious if anyone knows the correct sizes for the four o-rings for the connections to the expansion valve.
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Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (113k) 1991 350SD (206k) 1991 300D (228k) 1993 300SD (291k) 1993 300D 2.5T (338k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (265k) Past Diesels: 1983 300D (228K) 1985 300D (233K) |
#3
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The santech o-ring kits are cheap and usually complete with all the o-rings you need for your car. Just lube them up before installing
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#4
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I believe it takes one #6, one #10, and two #8 Orings.
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All Diesel Fleet 1985 R107 300SLD TURBODIESEL 2005 E320 CDI (daily) LOTS of parts for sale! EGR block kit http://www.peachparts.com/shopforum/diesel-discussion/355250-sale-egr-delete-block-off-plate-kit.html 1985 CA emissions 617 owners- You Need This! Sanden style A/C Compressor Mounting Kit for your 616/ 617 For Sale + Install Inst. Sanden Instalation Guide (post 11): http://www.peachparts.com/shopforum/diesel-discussion/367883-sanden-retrofit-installation-guide.html |
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