I have a slow freon leak right around the connecting line going into the dryer on my 66. It appears that the fitting is tight. Are their O-rings on these fittings? If not, how are they kept from leaking?
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Gary Nyland
1966 Black Corvette Air Coupe
2014 Black Z-51, 3LT Coupe
1955 Black Chevy Belair Gasser
1955 Nomad -
Re: 66 AC question
O-rings are used at all or almost all joints on the GM cars. This specific connection uses o-rings. Replace with HNBR (green) rubber o-rings which are suitable for both R12 and R134a refrigerants.
I would suggest replacing all the o-rings in this vicinity (I think there are 3 or 4) when you do this job. If you haven't changed the drier in 10 years or more (or never) consider replacing it also at this time. Original driers can be rebuilt. Non-original or replacement driers are relatively cheap $.
Lube the replacement o-rings with refrigerant oil and install. Torque values are relatively low for these connections, so you don't need a big wrench.
Larry -
Re: 66 AC question
I would suggest that you soak that joint in penetrating oil for a day or two. Aluminum to aluminum fitting are notorious about seizing. Also use TWO wrenches if you do not you take a chance of breaking parts.
Good advice about changing O rings. If you disturbing a fitting, new rings should be installed with the green being the ring of choice.Dick WhittingtonComment
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