Low oil temp after oil change

AirbusPilot · #1 03-18-2010, 02:37 PM

Hi Folks,

I just changed oil and filter for the first time to my Lycoming IO-360-M1B at 10 hours. But oil tempeture has lowered from 180 to 150 degrees. CHT, EGT and outside tempetures are about the same so why the oil tempeture has lowered.

Anyone with the same problem???

Bavafa · #2 03-18-2010, 05:10 PM

I have the same engine but did not experince such drastic reduction in oil temp. You are still using the same type oil right?

AirbusPilot · #3 03-18-2010, 06:36 PM

Quote:

Originally Posted by Bavafa

I have the same engine but did not experince such drastic reduction in oil temp. You are still using the same type oil right?

Yes I am using same oil and filter

Kevin Horton · #4 03-18-2010, 07:04 PM

Maybe it is a complete coincidence that this change occurred the same time as you changed the oil. I had one of my CHT probes start reading low, and the cause turned out to be high resistance at a connection. I cleaned and reseated the connector, and that CHT indication came back in line with the others.

How is your oil temperature probe grounded? I'd look for a bad ground there. I'd also reseat any connections in the ground or power wires for the oil temp probe.

As a final check, you could remove the oil temperature probe and put in a pot of boiling water to confirm it is reading correctly.

Jaypratt · #5 03-18-2010, 07:19 PM

if you are breaking in a new engine,,, did you change the kind/ weight of oil,,, or anything else??

jthocker · #6 03-18-2010, 08:57 PM

Fernando,
I had the same problem with a Dynon oil temp probe. One day, it stopped reading above 150, Dynon sent a new probe and everything was normal again.
I'm betting it's the probe!
Regards,

AirbusPilot · #7 03-19-2010, 07:27 AM

I will check the probe with hot water thanks!!!

AirbusPilot · #8 04-02-2010, 11:31 AM

I messure temp with two digital termometter and two infrared termommeter and Dynon probe read accurate tempeture below 150 F but do not goes up from there. I am absolutely happy with dynon avionics but aparently they use cheap probes.

loopfuzz · #9 06-11-2012, 12:28 PM

I have the same issue here with the dynon oil temp sender. It won't read anything higher then 150F.

boomer · #10 06-13-2012, 12:42 PM

Quote:

Originally Posted by Kevin Horton

As a final check, you could remove the oil temperature probe and put in a pot of boiling water to confirm it is reading correctly.

How do you physically do this? Do you patch in some long wires between the temp probe and the aircraft? And how do you handle the ground? Also, what is the best (i.e. the safest) way to boil the water? Thanks.

-John