Arthur:

Yes...I'm talking about the outer threads; not the depressable valve.

Are there any mass-marketers..ie..Sears, etc. that might sell a tool suitable for this re-dyeing?

I have R-12 gauges, but am simply trying to avoid having to extract refrigerant, remove hose, pay for hose repair, etc.

Thanks.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

Oh I see. Not the valve core. I'd say your best bet is to find a thread file and go at it. I don't know offhand what thread pitch the service fittings are, but I could find out tomorrow (daylight) if that'd help.

Thread Files

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1989 300 SEL that mostly works, but needs TLC

$$$PIT:

If it won't cut into your 4th of July holiday, I would appreciate that information.

Thanks for your time.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

Sure .. Sears is as good a place as any..
Just ask for a 7/16x20 die...

PS ... seeing its a Holiday, you may even have a friend with a standard tap/die set .. that die is in any regular tap/die set.. nothing special about the thread... I would put some grease/petro jelly on the treads to catch the
metal the die is going to cut away and then wipe it w/rag. .turning CW.. lastly, just get a quick squirt from the valve stem by depressing it to have the system pressure blow what is left in the valve out of it to be sure ...
Gerry rig works great at times of dispair..
I have even gone so low as to make a die out of a flare nut by cutting a pie shape out of it as a relief and screwing onto the male .. it actually will cut threads .
Good Luck..

Arthur:

Thanks for your help.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"

I see Arthur saved me a trip to the toolshed. Good luck with it.

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1989 300 SEL that mostly works, but needs TLC

There are special tools available that let you change the schrader valve without loosing the charge. I've never used one and have never figured out how they work, but you can get them at places like ackits.com and acsource.com.

Good luck and Happy Birthday USA,

Something I've ben wondering for awhile, are the A/C valves that much different in the seals from a tire valve? The R12's are the same size, so can a tire valve core be used to repair a leaking R12 valve?

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

Been a while since I bought any, but I can't imagine the correct core costing enough to make this substitute tempting. GM specifies that the valve cap with rubber seal is the seal for the service ports, and not the valve cores. Your mileage may vary.

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1989 300 SEL that mostly works, but needs TLC