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A/C R-12 service port dust cap

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Old March 17th, 2011, 08:31 AM
  #1  
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A/C R-12 service port dust cap

I seem to remember these caps being thin Aluminum with a neoprene seal inside. My car has a Black plastic cap with the correct shape and seal inside but plastic not Aluminum. The 'Parts Store' replacement cap available is the Black plastic style. Anyone know which is correct? Was the Aluminum cap used on older cars only?
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Old March 17th, 2011, 08:53 AM
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Originally Posted by mmurphy77
I seem to remember these caps being thin Aluminum with a neoprene seal inside. My car has a Black plastic cap with the correct shape and seal inside but plastic not Aluminum. The 'Parts Store' replacement cap available is the Black plastic style. Anyone know which is correct? Was the Aluminum cap used on older cars only?
I think like everything else they were changed to plastic. My 72 has the aluminum caps installed on the POV. Try a bone yard for a used one.

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Old March 17th, 2011, 11:36 AM
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I remember the originals as all aluminum, too.

- Eric
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Old March 17th, 2011, 09:00 PM
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FWIW, my '70 Fremont built 442 has a aluminum cap.
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Old March 18th, 2011, 05:08 AM
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Originally Posted by ROCKET VAPOR
FWIW, my '70 Fremont built 442 has a aluminum cap.
Thanks Lance. Let me give you my address where to send it j/k.
Does anyone know if my '71 should be Aluminum or Plastic? Was there a switch over to Plastic at some point?

Last edited by mmurphy77; March 18th, 2011 at 05:10 AM.
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