Re: {Chrysler 300} 1962 A/C Switch & Vacuum Hoses

Is the hose 1/8” that feeds the back of the A/C switch? It small

Matt Allyn

(562) 533-2551

On Tuesday, September 16, 2025, 8:36 PM, Rich Barber <c300@xxxxxxx> wrote:

The actuator rods in our 300K had atmospheric corrosion on them. I polished the rods in the portions that reciprocate through the full range of the diaphragm stroke, lubed them, tested them with a vacuum gun and reinstalled. Not perfect but I feel the tiny leak is acceptable to the engine. Any ideas to extend the life of the internal diaphragms. Flexible stopleak? Mousemilk for old diaphragms? GoJo fix?

Vacuum hoses are not removeable. To replace, cut and remove the old hose, leaving several inches at the rubber block end and attach a new hose with a piece of tubing or double-barbed plastic tubing fitting. Cut to length-plus a little.

Rich Barber

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of John Grady
Sent: Tuesday, September 16, 2025 5:56 AM
To: Matt Allyn <allynentertainment@xxxxxxxxx>
Cc: Club Chrysler <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: Re: {Chrysler 300} 1962 A/C Switch & Vacuum Hoses

i do not think that comes apart , if a bad hose maybe use brass tubing pieces to couple new ones , otherwise use as it is .
Amazon sells a package of various size brass tubes about a foot long , good to have anyway
On this , first never wiggle that block trying to get it off , that breaks off the small plastic nipples

Second coat rods of actuators with silicone grease , rubber gets hard where they exit the can , you get a vacuum leak , slow or intermittent action results . Cannot get new stuff , cant open can to fix either.
There is a tiny hole in the bottom of vacuum inlet line slows flow . Not sure a good idea but when combined with slight leaks it does not move right
Maybe it woukd slam withiut the restriction .

All by way of heads up
j

On Sep 16, 2025, at 12:07 AM, 'Matt Allyn' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:
The 7 vacuum hoses from the engine bay & under the dash….
All collect into a rubber bulkhead that slides onto the back of the A/C Switch plastic nipples.

But my question is….
If you wanted to replace one or more of the vacuum hoses….
Do they slide INTO that rubber bulkhead item?
Or was that molded with the various length hoses from the factory?

Thanks
Matt Allyn

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