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I can think of a possible reason that the stock coolant temp sensor in the rear housing of the 13B will read higher than the outlet water temperature after the water pump. First, the coolant at the rear housing near the sensor will normally be higher (I've measured it) than coolant flowing past the first housing - due to the fact the first housing has added its heat before the coolant gets to the second (rear) housing. Now this could lead you to believe that therefore the coolant temp coming out the pump would naturally be at least as high as at the rear housing. However, I suspect that some of the hotter coolant's heat is transferred to the cooler incoming coolant (that the hotter coolant passes headed back to the pump) - this through the metal connecting the different coolant channels
Just a SWAG
Ed.
----- Original Message ----- From: "george lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, August 09, 2006 6:23 PM
Subject: [FlyRotary] Re: water temp location
Buly/ Bill,
I'm confused - any indications, suggestions, ideas why there should be a
difference.
Perhaps higher pressure after the pump?
I think I would want to know the highest, in engine, coolant and oil temps.
George (down under)
I did it with one of the handheld temp meters. Surprisingly the water
exiting the pump was about 5-10 degree lower temp? Did it couple
different ways and the results were similar.
Buly
> Group,
>
>
>
> Has anyone measured the water temp difference between the stock
> (under the oil filter tower) and the water pump outlet. Bill Eslick
> and I were discussing this a couple of weeks ago. I am measuring
> water temp going out of the engine, post water pump outlet. Just
> curious!
>
>
>
> Thanks,
>
> Jason
>
>
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