Assistance to identify connector for coolant temperature sensor

Often it you look at the connector, you can find a number embossed on it somewhere which can help.  Another place it try is findpigtails.com as they have a lot of pictures that can help match a connector.  I remember seeing a web site where you could upload pictures of a connector and it would try to use AI to identify it, but I am not finding that site now.

A question: are you looking to add additional sensors to the same engine? Or are you looking to instrument another engine type?  Liquid cooled engines seldom need separate temp sensors for each cylinder as the liquid cooling is far more efficient than air cooling and there is seldom significant variation cylinder to cylinder as with an air cooled engine.

You had it, Matt.  https://findpigtails.com/photo/

My money is on that being a Weather-Pack or Metri-Pack.

EDIT: Nope, it looks like that's a Bosch T72B2.  Here's the connector with wires installed, and here's a reasonably priced alternative.  Also available on Amazon, here, here or here.

Matthew S Whiting P.E. wrote:

Often it you look at the connector, you can find a number embossed on it somewhere which can help.  Another place it try is findpigtails.com as they have a lot of pictures that can help match a connector.  I remember seeing a web site where you could upload pictures of a connector and it would try to use AI to identify it, but I am not finding that site now.

A question: are you looking to add additional sensors to the same engine? Or are you looking to instrument another engine type?  Liquid cooled engines seldom need separate temp sensors for each cylinder as the liquid cooling is far more efficient than air cooling and there is seldom significant variation cylinder to cylinder as with an air cooled engine.

Hi Matt,

The owner of the aircraft has had a significant engine failure that required complete engine replacement , the fault was found to be a cylinder head losing coolant into the combustion chamber, before the engine was removed from the airframe it was test run on the ground and the particular cylinder head that failed measured significantly higher temperatures with an infrared heat gun even at idle power.Unfortunately the cylinder that failed was not the one being measured by the Rotax fitted sensor, As such the owner is keen to be able to datalog and measure all four cylinder head temps on the replacement engine.

The existing sensor obviously connects to the engine ECU and then feeds this data to a Garmin G3X with the FADEC data stream, we are sinply adding some extra sensors to the cylinder heads and will connect via a Garmin GEA24 so the G3X will display the extra cylinder coolant temps and log every second with the other G3X data.

Regards,

Byron.

Eric Page wrote:

You had it, Matt.  https://findpigtails.com/photo/

My money is on that being a Weather-Pack or Metri-Pack.

EDIT: Nope, it looks like that's a Bosch T72B2.  Here's the connector with wires installed, and here's a reasonably priced alternative.  Also available on Amazon, here, here or here.

Thanks Kindly Eric,

Have now got some photos of the connector on the actual sensor, please see attached.

The sensor looks to have three locating tabs/guides on horizontal plane and on one each end of the vertical plane.

Kind Regards,

Byron

Does each cylinder have a port into the water jacket?  I haven’t looked closely at my 915.