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Functions of plug holes on water pump on diesel 2.5 L?


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#1 Kjeles

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Posted 11 May 2018 - 02:02 AM

Can anyone tell me the functions of the two plug holes ("A" and "B") on top of the water pump of Scorpio diesel 2.5 L (see photo below)?

I have this engine in my boat and wonder how to connect these holes. Maybe "A" is for a zinc anode and "B" is for bleeding the cooling system?

29deees.jpg


Edited by Kjeles, 11 May 2018 - 02:08 AM.


#2 PURPLE_2L_LX

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Posted 11 May 2018 - 05:37 AM

A= temperature sender

 

B = (if actually open)  the return back to to the expansion tank. Which will also

allow air trapped in the system to escape also.

 

But B may actually be blocked and not used on that engine. Is yours hollow?


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#3 Kjeles

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Posted 11 May 2018 - 07:41 AM

Thank you so much, Purple_2L_LX. Very useful information.

On the old pump, both holes are plugged in an amateurish way. Seems like I can plug the new pump too. The temperature sender sits in the side of the engine block, and there is no expansion tank since the heat exchanger with sea water acts as expansion tank.






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