Bought a manifold gauge for r12 and realized that at some point the valve was removed and an r134 adapter screwed into the port.

So I'd like to reinstall the valve core and toss the 134 adapter.

Dealer has 2 in stock. But $22 each. Ouch.

Are these standard valves? I can get a master cool kit with a bunch of valves for 45 bucks

Replies appreciated

Thanks

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1983 300CD Turbodiesel