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.
The way you measured the temps is the way it
should be, as long as the water is flowing well. The water leaves the
engine at the thermostat housing, so it has picked up all the heat it can from
the engine. That will be the hottest point. The water
then goes to the radiators, cools off, and comes back to the engine. It
then goes through about half the engine to get to the point where the other
sensor is located. It should be cooler here, than it will be when
it makes it through the other half of the engine to get to the thermostat
housing. Ed must have a wacky gauge
:-)
With a 20 degree difference at the
halfway point, the cooling system must be doing a reasonable good
job.
For water,
the standard is to measure it as it leaves the engine, which is the hottest
point. I would think that's what you'd want to do with the oil as
well, but unfortunately, there's no practical way to do that. The
oil drips back to the pan from different places, and you can't measure
that return flow directly. You can measure the pan temp, as I did
originally, but it's not the best reading, since there isn't really a constant
flow of oil past the sensor. I suspect that measuring the oil
as it returns to the engine was selected as the next logical point. I
have the pan temp hooked up as an Aux temp on the EM-2, but I can't say I've
looked at it yet. Maybe when Tracy gets around to that data
logging... :-)
Someone else said that the remote oil
filter was a good place to put the sensor, so I'm going to check into that
this afternoon, and see if that is
possible.
Steve