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Author Topic: Coolant Valve  (Read 590 times)

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Offline John Nguyen

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  • Year_Model: 1950 170S-Cab-A
Coolant Valve
« on: March 15, 2017, 08:15:09 PM »
Hi,

I got these Brass Radiator Coolant Valves does not turn.
Does any body had these things restored or could share some experiences
(see attached pictures)

Regards,
John C.N.

Offline John Ellis

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  • VIN #: 136.060-00325/53
  • Year_Model: 1953 170Vb
Re: Coolant Valve
« Reply #1 on: March 15, 2017, 11:26:31 PM »
John,

The top picture is of the heater isolation valve.  Mine is identical and it was tough to remove the stem and 1/4 turn cylinder.  The hollow valve cylinder is closely honed to the diameter of the valve body so after sitting in the heated water they are calcified and corroded.  I ended up soaking the valve in a bath of white vinegar for a couple of hours to remove the calcification, then in a bath of penetrant oil, and lastly, heated the valve body up with a torch while lightly hammering from the bottom of the cylinder with a drift tool.

The bottom picture is the radiator drain valve.  As I recall, the cylinder in this valve is solid and slightly tapered.  Same process as above only you will be lightly hammering the stem where the spring was fixed.

On assembly I used an anti-seize compound to hopefully ease the disassembly of the valves in the future.  I also used a 3/32" (2.3mm) diameter TEF packing for the heater isolation valve.  This can be found at your local hardware store and is used for packing old plumbing faucets and hose bibbs.

Hope it works for you!
« Last Edit: March 15, 2017, 11:39:36 PM by John Ellis »
John Ellis
1953 170Vb
1958 190
2007 Porsche Cayman

Offline John Nguyen

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Re: Coolant Valve
« Reply #2 on: April 18, 2017, 07:24:08 PM »
John Ellis,

"Great Instruction"
follow the instruction above, turned out pretty good.

Thank you,
John C. N.