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Author Topic: Stuck WRD  (Read 4329 times)

mfriedman

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Stuck WRD
« on: February 17, 2011, 17:40:02 »
Dose anyone know a way to free up a stuck WRD plunger? After immersing in boiling water the plunger only moved out about 1/4". Thank you!
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66andBlue

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  • USA, CA, Solana Beach
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Re: Stuck WRD
« Reply #1 on: February 17, 2011, 18:09:07 »
As far as I know that is the distance you can expect.
Search and you will find: http://www.sl113.org/forums/index.php?topic=9244.0
Which WRD do you have, early one or current one?
It would be very helpful if you add an automatic "signature' to you posts telling us what car you have.  ;)
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Alfred
1964 230SL manual 4-speed 568H signal red
1966 230SL automatic 334G light blue (sold)
1968 280SL automatic (now 904G midnight blue)

mfriedman

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Re: Stuck WRD
« Reply #2 on: February 17, 2011, 18:18:05 »
I have a 1965 230sl, still learning to post properly.
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66andBlue

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Re: Stuck WRD
« Reply #3 on: February 17, 2011, 20:56:19 »
Hi,
no problem you'll be an expert soon!  ;)
Since you have a 230SL it is most likely that you have an early IP (R11) with the very old style thermostat:
http://www.sl113.org/wiki/Fuel/Injection#Pump.
A photo of the sensor is shown in this topic: http://www.sl113.org/forums/index.php?topic=5460.
Note that internal plunger (a wax filled cylinder) is longer than in later ones. You cannot buy it anymore so be very careful!
Here is a photo of the later sensors: http://www.sl113.org/forums/uploaded/WillS/200612815248_IP_Therm_Arrows.jpg
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Alfred
1964 230SL manual 4-speed 568H signal red
1966 230SL automatic 334G light blue (sold)
1968 280SL automatic (now 904G midnight blue)
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