RE: {Chrysler 300} Wheel cylinder replacement advice

One thing I do when replacing wheel cylinders is inspect all the rubber hoses for cracks and wear if they look questionable, I replace them. The system is open and a good time to replace.

Mel Stoltzman

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of John Grady
Sent: Tuesday, May 27, 2025 4:42 PM
To: Ron Waters <ronbo97@xxxxxxxxxxx>
Cc: chrysler 300 club <chrysler-300-club-international@xxxxxxxxxxxxxxxx>; Kurt Brueske <kurt.brueske@xxxxxxxxx>
Subject: Re: {Chrysler 300} Wheel cylinder replacement advice

I do not agree with that advice .

Leak is usually due to rust pits in the bottom of the wheel cylinder , does not just “ happen”

Hygroscopic brake fluid not changed for years gets saturated with water carries water to wheel cylinder causes a rust divot at bottom . ( It precipitates out) one day seal slides over divot as shoes wear . fluid flys out under seal no brakes . If in one wheel , its probably in all of them imho

Do it right , all 4 . Id go silicone no water transport why military uses it .

Can do glycol new , but why? have to drain and fill every few years , and you don't know if divot

no thanks, been there

On May 27, 2025, at 4:29 PM, 'Ron Waters' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Kurt –

If it ain’t broke, don’t fix it. Just replace the leaking cylinder. Also, DOT 3 is indeed hygroscopic. That’s a good thing. Leave it as DOT 3, unless you are planning to replace the *entire* brake system. You’ll be doing a flush when you replace this leaking cylinder. Going forward, just change your fluid every three or four years and you’ll be fine.

Ron

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx On Behalf Of Kurt Brueske
Sent: Tuesday, May 27, 2025 4:15 PM
To: Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: {Chrysler 300} Wheel cylinder replacement advice

I could use some advice on whether I should replace all four wheel cylinders or just the cylinder that is leaking? Full disclosure this is for my ‘64 Imperial Crown Coupe, not a letter car, but figured the advice would also be beneficial to letter car owners as well.

I discovered the driver side rear is leaking and set out to replace ALL the wheel cylinders as a “preventive measure.” When I checked the condition of the other three cylinders, they all appear fine but I suspect they’re old - “Wagner Lockheed - Made in USA” is stamped on the housing and we all know how few automotive parts are made domestically these days.

Question: should I “leave well enough alone” or is there some benefit to replacing all four at once besides knowing they’re new?

I suspect hygroscopic DOT 3 brake fluid was previously used and the car sat for the better part of 20 years…some clumpy viscous residue in the bottom of the master cylinder. I was thinking replacing all four wheel cylinders would aid in a brake fresh and upgrade to DOT 5.

I appreciate the feedback and help.

Kurt

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