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#4042198 - 01/04/20 10:54 PM Re: Back in the Classic Car hobby! [Re: GrumpMarky]
GrandMarq9807 Offline
Over the Hill

Registered: 05/10/10
Posts: 4420
Loc: Virginia
The pressure switch can be removed at any time, doesn't seal anything. If the O rings were leaking, fluid would be flowing from switch...

There are seal repair kits for the pressure differential valve (Torino, Mustang etc) but I have no idea if same kit fits full size.
_________________________
1998 Grand Marquis LS. 96K mi. .. Stock
2007 Grand Marquis GS. 90K mi. .. Stock
1996 F-150 XLT 196K mi Beater, Stock

----------My Toys---------(links are up)
1969 Fairlane Cobra 428CJ 4-Speed
1972 Comet GT Restomod 306, C4
1988 Turbo Coupe 331 AOD & 3.73 .. Pressurized ½ Motor is History

*****************NEW TOY!!!*********************
1969 Base Fairlane 302, C4, 45K mi(really!)

Now with P/S & PDB
Gonna wake it up with a Blue Print headed 347




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#4042252 - 01/05/20 12:37 PM Re: Back in the Classic Car hobby! [Re: GrandMarq9807]
GrumpMarky Offline

I ♥ big cars!
Poobah

Registered: 10/13/03
Posts: 5067
Loc: Lake County snow belt
Originally Posted By GrandMarq9807
The pressure switch can be removed at any time, doesn't seal anything. If the O rings were leaking, fluid would be flowing from switch...

There are seal repair kits for the pressure differential valve (Torino, Mustang etc) but I have no idea if same kit fits full size.


OK, that's encouraging. smile I will first try to soften the rubber using 1. the interweb method: soaking in silicone and sealing in airtight bag for a week. 2. modifying the switch connector. After looking into that "rubber renue" it appears to be geared toward rubber plattens used on printers to make them soft and "tacky" again. I want just the opposite, soft and slippery. As for the kits: yes, I have seen them. I have the old pressure diff. valve out of my car, and think it probably can be rebuilt. The switch is available no problem, but the pigtail connector is nowhere to be found. I doubt if I am the only one having this problem. Or else no one else goes to the trouble of redoing everything in their brake system like I have done. But to be fair, the pr. diff. valve from the X-100 was still fine. So maybe the switch to DOT 5 in my car back in '95 was a bad idea. Erik said he has seen old DOT 3 brake systems ruined by DOT 5 in the past. I guess it just depends.

Just took the Marquis out for a drive today, since the roads are clean and dry although it is almost freezing. I wanted to see how the car acted with the new fuel filter. Much improved! It was badly hesitating before, now it is virtually gone! banana The brakes are good and confidence inspiring. Makes me wish Spring would hurry up and arrive. joy
_________________________
2003 Mercury Grand Marquis LSE
"The last of the un-decontented"
Tires: Bridgestone Turanza LS-H, Mercury OEM Trunk Organizer

Maintenance Log



Currently: 2003 Grand Marquis LSE, 1969 Marquis convertible




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