Engine Oil Temperature Gauge Installation – Defender – How to monitor engine oil temperatures

Engine Oil Temperature Gauge Installation – Defender – How to monitor engine oil temperatures

g’day I’m Brett in this video I’m going
to show you how to install an engine oil
temperature gauge when working a vehicle
hard in soft sand or when towing a
trailer in hot climates with little
forward speed for air cooling engine oil
temperatures can rise increased
temperatures reduce the engines oil
viscosity film thickness and film
strength reducing the lifespan and
lubricating effectiveness of the oil at
above 130 degrees Celsius or 266 degrees
Fahrenheit engine oil degrades rapidly
so to keep my oil lubricating my engine
effectively I’m installing an oil
temperature gauge to better monitor
engine oil temperatures allowing me
to respond to high temperatures such as
by pulling over idling the car with the
bonnet up to assist in air
cooling. Now I’ve chosen a video matched
gauge and sender unit this comes with an
accurate scale on the front allowing me
to know the actual temperatures compared
to a more useless gauge with a red and
green safe area which is pointless
you’ll need a 52 millimeter mounting
hole to mount the gauge the sender unit
requires a thread in the oil sump your
car may come with a thread already if
not you’ll need to remove your oil sump
have it drilled and an adapter braised on
to accept the sender an alternative is
if you have a large oil sump plug you
may be able to remove it have it drilled
and tapped to accept the sender or you can
search ebay and find a sump plug
adapter ready-made so let’s begin with
the installation I’ll be installing the
gauge in my Raptor dash by replacing the
boost gauge which isn’t really useful
for me disconnect the negative battery
terminal and then I disassemble the
Raptor Dash and remove the old gauge for
the wiring there’s a positive which is
an ignition switch to feed so that needs
to join up to something which switches
live when the ignition is on for a
defender there’s already a pre-existing
circuit for gauges so
I’m tapping into that by using a
piggyback adapter off one of my
previous gauges which I already have wired up
there’s a negative feed which goes to
earth and an S for the sender unit which
joins in through the firewall down to
your sender in the engine sump
there’s a positive and negative for your
lighting so negative to earth and
positive joins to your lamp circuit so
again I’m just piggybacking off my
pre-existing gauges as everything’s
already wired I need to modify the Raptor
dash slightly so the gauge will fit
screw the gauge mount on and then
connect all the wires positive to
positive negative to negative lamp to
lamp next I have to run the wiring
for the sender through the firewall
behind the dash up to the gauge the dash will
need to be removed and the wires pulled
through the firewall grommet. I use
fine tie wire behind the dash to help
pull the wire through crimp on the
connector for the sender wire and fit to
the S terminal then reassemble the dash.
install the sender I did a quick Indiana
Jones styled swap and didn’t lose any
oil tighten up and attach the sender
and that’s the installation complete I
just went for a quick spin around
the block a few times I’ve got the
temperature up to 80 degrees Celsius
which matches my other gauges so for
general operating temperature
everything’s running fine but under
heavier loading conditions like deep
sand and slow slow progress I now have a
way of monitoring the oil temperature
itself so I can pull up before any
degradation of the oil occurs thanks for
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17 Replies to “Engine Oil Temperature Gauge Installation – Defender – How to monitor engine oil temperatures”

  1. It would be interesting to know the comparison between Oil Temp and Water Temp…. Would just having a good water temp gauge be just as beneficial in warning of overall increased temps or do u reckon u need both?

  2. great video im doing the same thing with the VDO oil temp sensor 1/8 npt i was wondering if you put any thread sealer on the sensor ?….. and my other question is im going to be welding the sensor into my oil pan and my pan is aluminum… should the weld-in bung be aluminum or steel or does it make a difference ??? and should the bung be npt like my sensor is ? thank you !!!

  3. Great video mate! Iā€™m adding a water temp gauge to my old Holden and this will really help. Thanks for all your efforts! See you on the tracks.

  4. Hey Brett, thanks for this! Oil temp NEVER stays more than 5degc above coolant temp, so isn't it worth just having the coolant temp gauge? cheers, Simone

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