An oil temp question...
 

If this needs to be moved, Trips, I understand....

So, this morning was a toasty 29 degrees. Drove 20 miles to work and the oil temp gauge never left 140 degrees.

On the way home it was 52 degrees. Temp gauge said 240 degrees.

I have an oil cooler with a thermostat. Car ran no higher than 190, on 90+ days.

I noticed that when I turned the car off, the gauge dropped to 180 for about 5 minutes and then dropped to bottom. I’ve never noticed if the gauge stayed “on” after ignition is off.

My question is, faulty oil cooler, faulty thermostat on cooler, faulty sender or faulty gauge?

Thanks in advance, youse guys!

What’s the gauge reading on subsequent startups? Still getting up to 240?


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One quick and cheap test I can think of…get a cheap infrared temp gun and see hot warm the oil cooler core is (may need to read both left and right side of the core). Compare temp gun reading against oil temp gauge.

My experience was, with 34R oil cooler uncovered, highway speed after a 10 min idle warm up yielded 160F in the same ambient temperature.

Remove your magnetic drain plug...... LOL

:roflpuke2:

This joke isn’t going anywhere anytime soon hahaha

Start the car up and se if it repeats.

+1

This is what caused my high oil temps as well. I can finally sleep at night.

Especially if after removal of said plug, you plug it up your :icon23:

Gauge is staying lit upon shut down.

I would start the diag from here, Oil temperatures should not changing that drastically.
One cheap way to test is to get it to happen again, once it does plug in your OBD scanner and see if the ECM is registering the same temperatures.
If it is then it point's towards a bad sensor or faulty wiring to the sensor.
This technically should throw a code but possibly not since temp's are within specs.

Secondly the Triple meter is fed by 5 wires.

Batt
Acc
Ground
Cluster CAN H
Cluster CAN L

Let's assume ground is good, this would leave the issue between battery feed and accessory feed. It's possible that you have a faulty power feed to either of these two pins. Sometimes a loose triple meter connection, though triple meter failure is rare, if you've confirmed that ECM reading is not the same as the Triple and power checks out you should try another Triple and see if the issue goes away.

Good luck

It was working normally today. It was a lot warmer, but I’ll keep an eye on it.