Message-ID: <1085314557.40b095fd796a6@webmailapp4.cc.utexas.edu>
Date: Sun, 23 May 2004 07:15:57 -0500
From: msteitle@mail.utexas.edu
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] water temp sender
References: <list-85440@logan.com>
In-Reply-To: <list-85440@logan.com>
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Steve,
I had the same question a while ago... I was told to measure the oil after the
cooler (as it returns back to the engine), and measure the water on its way out
of the engine going to the radiator.  So, my water temp sensor is on the
thermostat housing and the oil sensor is on the oil filter adapter.

Mark S. 


  Quoting Steve Brooks <steve@tsisp.com>:

> I now have another question.  Since I found out that I'm measuring water
> temperature twice, and not measuring oil temperature at all, now I have
> another issue.
> I getting about a 20 degree difference between the two coolant temps.
> 
> My coolant temp gauge sender is mounted in a port that was in the back side
> of the water pump housing.  As I recall, it's in the vicinity of the
> thermostat somewhere.
> The other temperature reading is from what I though was the oil temperature
> port which is next to the oil pressure port, but turns out to be coolant.
> If that is the right place to measure coolant, then I'm kind of happy (not
> about being stupid about oil temp) that the coolant temperature is much
> lower than I previously thought.
> 
> Also I wonder about why such a big difference ?  The only thing that I could
> think of is that one is on the outlet side of the radiator, and the other is
> on the hot side coming out of the engine before it goes to the radiator.
> Since I have no clue about where the coolant comes from that I'm measuring
> next to the oil pressure sender, I really don't know.
> 
> BTW My water temperature gauge is a VDO Vision series analog gauge, and the
> oil temperature / pressure is a Aerospace logic digital display.  The Aero
> Logic is suppose to be accurate to within 1 degree, so I know that
> temperature is pretty accurate.  The analog gauge really doesn't say what
> its' accuracy is, so I guess that you can only ASSUME it's correct.
> 
> So, where should I be measuring coolant temperature ?
> 
> Steve Brooks
> Cozy MKIV N75CZ
> Turbo Rotary
> 
> 
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>