Re: Standard operating temprature and gauge reading

["Harold McElraft" <hmcelraft@xxxx>]

The thermostat specs for OEM are; start to open 185F - full open 
212F.
The thermo fan switch OEM is; Fans on 207F - Fans off 196F.

John Hervey has this and other specs readily available on his web 
pages. With pictures.

If the gauge is operating properly and the engine temp is being 
maintained at what I call running-against-the-thermostat, the temp 
needle would be on or nearly on the first white line from the bottom 
line of the temp gauge. Approximately 185F. The gauge sender is not 
in the highest temp location. The coolant has some engine head to go 
before passing by the thermostat. The sender is located close to the 
firewall, passenger side, in the head. It has a one wire connector, 
a Green/blue wire. I have over the years experienced failure of 
nearly all the temp parts, gauge, sender, thermostat, wire 
connections and even the fan switch, although it is not connected to 
the gauge, I get use to hearing the fans come on and go off at 
particular points of the temp gauge. This is one way to determine if 
the gauge is ok. Do the fans come on and go off at the same point on 
the gauge they always have? If so, then I would say the thermostat 
needs replaced.

A very handy tool to have is a temp gun. I have a Raytek, about $80 
I think, that has allowed me to check the surface temps of just 
about any component to give me an idea of what is going on. BTW, my 
thermostat failure was for a stuck open problem. It seemed to open 
all the way but not close completely which would cause a condition 
similar to the one you describe.

Harold McElraft - 3354



--- In dmcnews@xxxxxxxxxxxxxxx, jordan rubin <nuttenschleuder@xxxx> 
wrote:
> Hello all:
> 
> Ive noticed lately that my D may be running a bit
> cool (even in the summer) I say may because im not
> sure of the exact running temperature that the car
> should maintain. If its running to cool and the
> thermostat is opening to early this is not good for
> the engine.
> 
> Does anyone have an official delorean operating
> temperature?
> 
> Has anyone ever put a thermometer in line to see if
> the gauge is accurate?
> 
> Then again It could be the gague. which connects
> to some potentiometer that changes resistance with
> heat. 
> Does anyone know the resistance/temperature
> values for this temp sending potentiometer. F not C
> 
> Is this the one by the water pump on the left side.
> 
> 
> thanx
> 
> Jordan 11613
> 
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