'89 AC Help!!!!!

[ocrick]

My '89 coupe uses R12 and I noticed that the high pressure side schraeder valve is leaking. I went to change it out and my tool wouldnt quite fit....is it one of GM's special "high flow" valve cores??? How do I tell and mor importantly where can I get some? I went to the GM dealer and their parts book did not show the cores as service parts and the high side tube is no longer available.

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[JonM]

The high side service charge valve does not have a threaded schrader valve core and it cannot be removed, using a conventional schrader valve core remover.

http://www.heco.net/techtips.htm See Tech Tip #2

 

[ocrick]

Thanks for the link to the tech tip. However, mine does not resemble that illustration. there is the normal shraeder valve center pin sticking up (with a slightly larger "mushroom" head). When I use a core tool it rotates.

Does that give any clue?

Thanks!