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GRAY U Water Pump

Old Marine Engine » Gray Motor Co - early 1 and 2 cylinder » GRAY U Water Pump « Previous Next »

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Tom G.
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Posted on Saturday, January 12, 2013 - 10:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

The five bolt water pump on my Gray U has a plunger cap of some sort stuck in it. There's a spring that sits in it, and tension is provided by the brass plug that screws in the top.
The stuck cap is non-magnetic, and looks like it could be made from fiber. There's another assembly underneath it, consisting of a spring and plunger. I don't want to break the stuck cap. I've tried air pressure and a needle nose, but no luck. Anyone had one of these apart? Ideas welcomed. Thanks, Tom
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Tom G.
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Username: tomfg

Post Number: 1
Registered: 01-2013
Posted on Saturday, January 12, 2013 - 09:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Update, I finally was able to remove the stuck valve, with lots of WD-39-1/2, trying air pressure, but it was finally the needle nose that pulled it loose. The cap / valve turned out to be brass.

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