Drain Plug Oil Temperature Sensor

Post Reply
JoeInTUS
New Member & Happy To Be Here
New Member & Happy To Be Here
Posts: 11
Joined: Sun Jul 12, 2020 4:01 pm
Location: Tucson, AZ
Location: Tucson, AZ

Drain Plug Oil Temperature Sensor

Post by JoeInTUS »

I decided an oil temperature gauge would be more useful than an altimeter, so where to place the sensor. Initially I was going to tap into one of the oil gallery plugs as others have done and then I found this VDO sensor (323 092) that fits the drain plug hole. A female spade connector fits on the round connector of the plug. The plug fully threads into inside portion of the pan, so the sensor portion of the plug clears the threads in the pan.
Sensor Unmounted Compress.jpg
It sticks out about a 1/2" below the plug guard on the oil pan and just slightly below the exhaust.
Drain Plug Sensor Compress.jpg
I used an old starter terminal boot to protect the connection.
Drain Plug Sensor with Cover Compress.jpg
Since it is brass I was was concerned with over torqueing the plug, so I only torqued it to 10 ft lbs. After about fifty miles it seems to work fine with no leaks.
You do not have the required permissions to view the files attached to this post.
Joe Sileo
Tucson, AZ

steve murdoch icoa #5322
ICOA Member
ICOA Member
Posts: 3610
Joined: Tue Mar 04, 2003 10:12 am
Location: St. Catharines, On. Canada
Location: St. Catharines, On. Canada

Re: Drain Plug Oil Temperature Sensor

Post by steve murdoch icoa #5322 »

Looks trick, Joe.
I have a very similar set-up on my '81 installed by the previous owner.
The only issue i had was the gauge itself. It always registered much higher than the real temperature. Calibration?

JoeInTUS
New Member & Happy To Be Here
New Member & Happy To Be Here
Posts: 11
Joined: Sun Jul 12, 2020 4:01 pm
Location: Tucson, AZ
Location: Tucson, AZ

Re: Drain Plug Oil Temperature Sensor

Post by JoeInTUS »

Steve, best I can tell it is accurate. I checked the indicated temp vs IR temp of the plug and they were close.

Maybe your sensor is not correctly matched to your gauge.
Joe Sileo
Tucson, AZ

User avatar
EMS
ICOA Member
ICOA Member
Posts: 9763
Joined: Wed Mar 05, 2003 8:55 am
Location: North East OH, ICOA 3904

Re: Drain Plug Oil Temperature Sensor

Post by EMS »

I am a big fan of that concept vs the sensor in any other place.
I do not ride any of my vintage bikes or cars to be concerned about the oil temperature to be too high. An oil pressure gauge is a better safety item.
I am concerned, however, about the oil not being up to the right temperature. Oil too cold could have insufficient lubrication qualities and also, any moisture in the oil sump/tank will not evaporate unless your oil is above 212° in the coldest spot - which is usually the bottom of the sump. Well done!
To be understood is the exception
To be misunderstood is the rule.

daves79x
ICOA Technical Director
ICOA Technical Director
Posts: 4000
Joined: Sun Oct 01, 2006 8:05 am
Location: Knox, PA
Location: Knox, PA

Re: Drain Plug Oil Temperature Sensor

Post by daves79x »

Excellent Joe!

Dave

Post Reply

Return to “X ...OTHER TECHNICAL: Won't Run, Centerstands, Chains, Fairings, Tanks, Gauges, Petcocks, Seats, Turn Signals, etc.”